diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index c29f39c01a9a..021e83fe831f 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -19,6 +19,9 @@
#include <linux/kmemleak.h>
#include "internal.h"
+#define list_for_each_table_entry(entry, table) \
+ for ((entry) = (table); (entry)->procname; (entry)++)
+
static const struct dentry_operations proc_sys_dentry_operations;
static const struct file_operations proc_sys_file_operations;
static const struct inode_operations proc_sys_inode_operations;
@@ -215,15 +218,19 @@ static void init_header(struct ctl_table_header *head,
INIT_HLIST_HEAD(&head->inodes);
if (node) {
struct ctl_table *entry;
- for (entry = table; entry->procname; entry++, node++)
+
+ list_for_each_table_entry(entry, table) {
node->header = head;
+ node++;
+ }
}
}
static void erase_header(struct ctl_table_header *head)
{
struct ctl_table *entry;
- for (entry = head->ctl_table; entry->procname; entry++)
+
+ list_for_each_table_entry(entry, head->ctl_table)
erase_entry(head, entry);
}
@@ -248,7 +255,7 @@ static int insert_header(struct ctl_dir *dir, struct ctl_table_header *header)
err = insert_links(header);
if (err)
goto fail_links;
- for (entry = header->ctl_table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, header->ctl_table) {
err = insert_entry(header, entry);
if (err)
goto fail;
@@ -978,7 +985,6 @@ static struct ctl_dir *new_dir(struct ctl_table_set *set,
table = (struct ctl_table *)(node + 1);
new_name = (char *)(table + 2);
memcpy(new_name, name, namelen);
- new_name[namelen] = '\0';
table[0].procname = new_name;
table[0].mode = S_IFDIR|S_IRUGO|S_IXUGO;
init_header(&new->header, set->dir.header.root, set, node, table);
@@ -1130,35 +1136,36 @@ static int sysctl_check_table_array(const char *path, struct ctl_table *table)
static int sysctl_check_table(const char *path, struct ctl_table *table)
{
+ struct ctl_table *entry;
int err = 0;
- for (; table->procname; table++) {
- if (table->child)
- err |= sysctl_err(path, table, "Not a file");
+ list_for_each_table_entry(entry, table) {
+ if (entry->child)
+ err |= sysctl_err(path, entry, "Not a file");
- if ((table->proc_handler == proc_dostring) ||
- (table->proc_handler == proc_dointvec) ||
- (table->proc_handler == proc_douintvec) ||
- (table->proc_handler == proc_douintvec_minmax) ||
- (table->proc_handler == proc_dointvec_minmax) ||
- (table->proc_handler == proc_dou8vec_minmax) ||
- (table->proc_handler == proc_dointvec_jiffies) ||
- (table->proc_handler == proc_dointvec_userhz_jiffies) ||
- (table->proc_handler == proc_dointvec_ms_jiffies) ||
- (table->proc_handler == proc_doulongvec_minmax) ||
- (table->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
- if (!table->data)
- err |= sysctl_err(path, table, "No data");
- if (!table->maxlen)
- err |= sysctl_err(path, table, "No maxlen");
+ if ((entry->proc_handler == proc_dostring) ||
+ (entry->proc_handler == proc_dointvec) ||
+ (entry->proc_handler == proc_douintvec) ||
+ (entry->proc_handler == proc_douintvec_minmax) ||
+ (entry->proc_handler == proc_dointvec_minmax) ||
+ (entry->proc_handler == proc_dou8vec_minmax) ||
+ (entry->proc_handler == proc_dointvec_jiffies) ||
+ (entry->proc_handler == proc_dointvec_userhz_jiffies) ||
+ (entry->proc_handler == proc_dointvec_ms_jiffies) ||
+ (entry->proc_handler == proc_doulongvec_minmax) ||
+ (entry->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
+ if (!entry->data)
+ err |= sysctl_err(path, entry, "No data");
+ if (!entry->maxlen)
+ err |= sysctl_err(path, entry, "No maxlen");
else
- err |= sysctl_check_table_array(path, table);
+ err |= sysctl_check_table_array(path, entry);
}
- if (!table->proc_handler)
- err |= sysctl_err(path, table, "No proc_handler");
+ if (!entry->proc_handler)
+ err |= sysctl_err(path, entry, "No proc_handler");
- if ((table->mode & (S_IRUGO|S_IWUGO)) != table->mode)
- err |= sysctl_err(path, table, "bogus .mode 0%o",
- table->mode);
+ if ((entry->mode & (S_IRUGO|S_IWUGO)) != entry->mode)
+ err |= sysctl_err(path, entry, "bogus .mode 0%o",
+ entry->mode);
}
return err;
}
@@ -1174,7 +1181,7 @@ static struct ctl_table_header *new_links(struct ctl_dir *dir, struct ctl_table
name_bytes = 0;
nr_entries = 0;
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
nr_entries++;
name_bytes += strlen(entry->procname) + 1;
}
@@ -1191,14 +1198,16 @@ static struct ctl_table_header *new_links(struct ctl_dir *dir, struct ctl_table
node = (struct ctl_node *)(links + 1);
link_table = (struct ctl_table *)(node + nr_entries);
link_name = (char *)&link_table[nr_entries + 1];
+ link = link_table;
- for (link = link_table, entry = table; entry->procname; link++, entry++) {
+ list_for_each_table_entry(entry, table) {
int len = strlen(entry->procname) + 1;
memcpy(link_name, entry->procname, len);
link->procname = link_name;
link->mode = S_IFLNK|S_IRWXUGO;
link->data = link_root;
link_name += len;
+ link++;
}
init_header(links, dir->header.root, dir->header.set, node, link_table);
links->nreg = nr_entries;
@@ -1213,7 +1222,7 @@ static bool get_links(struct ctl_dir *dir,
struct ctl_table *entry, *link;
/* Are there links available for every entry in table? */
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
const char *procname = entry->procname;
link = find_entry(&head, dir, procname, strlen(procname));
if (!link)
@@ -1226,7 +1235,7 @@ static bool get_links(struct ctl_dir *dir,
}
/* The checks passed. Increase the registration count on the links */
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
const char *procname = entry->procname;
link = find_entry(&head, dir, procname, strlen(procname));
head->nreg++;
@@ -1329,7 +1338,7 @@ struct ctl_table_header *__register_sysctl_table(
struct ctl_node *node;
int nr_entries = 0;
- for (entry = table; entry->procname; entry++)
+ list_for_each_table_entry(entry, table)
nr_entries++;
header = kzalloc(sizeof(struct ctl_table_header) +
@@ -1456,7 +1465,7 @@ static int count_subheaders(struct ctl_table *table)
if (!table || !table->procname)
return 1;
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
if (entry->child)
nr_subheaders += count_subheaders(entry->child);
else
@@ -1475,7 +1484,7 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
int nr_dirs = 0;
int err = -ENOMEM;
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
if (entry->child)
nr_dirs++;
else
@@ -1492,7 +1501,9 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
goto out;
ctl_table_arg = files;
- for (new = files, entry = table; entry->procname; entry++) {
+ new = files;
+
+ list_for_each_table_entry(entry, table) {
if (entry->child)
continue;
*new = *entry;
@@ -1516,7 +1527,7 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
}
/* Recurse into the subdirectories. */
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
char *child_pos;
if (!entry->child)
@@ -1670,7 +1681,7 @@ static void put_links(struct ctl_table_header *header)
if (IS_ERR(core_parent))
return;
- for (entry = header->ctl_table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, header->ctl_table) {
struct ctl_table_header *link_head;
struct ctl_table *link;
const char *name = entry->procname;
diff --git a/include/linux/acct.h b/include/linux/acct.h
index bc70e81895c0..2718c4854815 100644
--- a/include/linux/acct.h
+++ b/include/linux/acct.h
@@ -21,7 +21,6 @@
#ifdef CONFIG_BSD_PROCESS_ACCT
struct pid_namespace;
-extern int acct_parm[]; /* for sysctl */
extern void acct_collect(long exitcode, int group_dead);
extern void acct_process(void);
extern void acct_exit_ns(struct pid_namespace *);
diff --git a/include/linux/delayacct.h b/include/linux/delayacct.h
index 3e03d010bd2e..6b16a6930a19 100644
--- a/include/linux/delayacct.h
+++ b/include/linux/delayacct.h
@@ -61,9 +61,6 @@ extern int delayacct_on; /* Delay accounting turned on/off */
extern struct kmem_cache *delayacct_cache;
extern void delayacct_init(void);
-extern int sysctl_delayacct(struct ctl_table *table, int write, void *buffer,
- size_t *lenp, loff_t *ppos);
-
extern void __delayacct_tsk_init(struct task_struct *);
extern void __delayacct_tsk_exit(struct task_struct *);
extern void __delayacct_blkio_start(void);
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 820500430eae..3eb03d88320d 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -101,9 +101,6 @@ static inline int ftrace_mod_get_kallsym(unsigned int symnum, unsigned long *val
#ifdef CONFIG_FUNCTION_TRACER
extern int ftrace_enabled;
-extern int
-ftrace_enable_sysctl(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
diff --git a/include/linux/initrd.h b/include/linux/initrd.h
index 1bbe9af48dc3..f1a1f4c92ded 100644
--- a/include/linux/initrd.h
+++ b/include/linux/initrd.h
@@ -29,8 +29,6 @@ static inline void wait_for_initramfs(void) {}
extern phys_addr_t phys_initrd_start;
extern unsigned long phys_initrd_size;
-extern unsigned int real_root_dev;
-
extern char __initramfs_start[];
extern unsigned long __initramfs_size;
diff --git a/include/linux/latencytop.h b/include/linux/latencytop.h
index abe3d95f795b..84f1053cf2a8 100644
--- a/include/linux/latencytop.h
+++ b/include/linux/latencytop.h
@@ -38,9 +38,6 @@ account_scheduler_latency(struct task_struct *task, int usecs, int inter)
void clear_tsk_latency_tracing(struct task_struct *p);
-int sysctl_latencytop(struct ctl_table *table, int write, void *buffer,
- size_t *lenp, loff_t *ppos);
-
#else
static inline void
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 467b94257105..37951c17908e 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -16,10 +16,6 @@
struct task_struct;
-/* for sysctl */
-extern int prove_locking;
-extern int lock_stat;
-
#ifdef CONFIG_LOCKDEP
#include <linux/linkage.h>
diff --git a/include/linux/oom.h b/include/linux/oom.h
index 2db9a1432511..02d1e7bbd8cd 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -123,8 +123,4 @@ extern void oom_killer_enable(void);
extern struct task_struct *find_lock_task_mm(struct task_struct *p);
-/* sysctls */
-extern int sysctl_oom_dump_tasks;
-extern int sysctl_oom_kill_allocating_task;
-extern int sysctl_panic_on_oom;
#endif /* _INCLUDE_LINUX_OOM_H */
diff --git a/include/linux/panic.h b/include/linux/panic.h
index f5844908a089..e71161da69c4 100644
--- a/include/linux/panic.h
+++ b/include/linux/panic.h
@@ -15,12 +15,6 @@ extern void oops_enter(void);
extern void oops_exit(void);
extern bool oops_may_print(void);
-#ifdef CONFIG_SMP
-extern unsigned int sysctl_oops_all_cpu_backtrace;
-#else
-#define sysctl_oops_all_cpu_backtrace 0
-#endif /* CONFIG_SMP */
-
extern int panic_timeout;
extern unsigned long panic_print;
extern int panic_on_oops;
diff --git a/include/linux/reboot.h b/include/linux/reboot.h
index af907a3d68d1..a2429648d831 100644
--- a/include/linux/reboot.h
+++ b/include/linux/reboot.h
@@ -71,12 +71,8 @@ extern void kernel_restart(char *cmd);
extern void kernel_halt(void);
extern void kernel_power_off(void);
-extern int C_A_D; /* for sysctl */
void ctrl_alt_del(void);
-#define POWEROFF_CMD_PATH_LEN 256
-extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN];
-
extern void orderly_poweroff(bool force);
extern void orderly_reboot(void);
void hw_protection_shutdown(const char *reason, int ms_until_forced);
diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h
index c1076b5e17fb..e650946816d0 100644
--- a/include/linux/sched/sysctl.h
+++ b/include/linux/sched/sysctl.h
@@ -14,8 +14,6 @@ extern unsigned long sysctl_hung_task_timeout_secs;
enum { sysctl_hung_task_timeout_secs = 0 };
#endif
-extern unsigned int sysctl_sched_child_runs_first;
-
enum sched_tunable_scaling {
SCHED_TUNABLESCALING_NONE,
SCHED_TUNABLESCALING_LOG,
@@ -33,46 +31,7 @@ extern int sysctl_numa_balancing_mode;
#define sysctl_numa_balancing_mode 0
#endif
-/*
- * control realtime throttling:
- *
- * /proc/sys/kernel/sched_rt_period_us
- * /proc/sys/kernel/sched_rt_runtime_us
- */
-extern unsigned int sysctl_sched_rt_period;
-extern int sysctl_sched_rt_runtime;
-
-extern unsigned int sysctl_sched_dl_period_max;
-extern unsigned int sysctl_sched_dl_period_min;
-
-#ifdef CONFIG_UCLAMP_TASK
-extern unsigned int sysctl_sched_uclamp_util_min;
-extern unsigned int sysctl_sched_uclamp_util_max;
-extern unsigned int sysctl_sched_uclamp_util_min_rt_default;
-#endif
-
-#ifdef CONFIG_CFS_BANDWIDTH
-extern unsigned int sysctl_sched_cfs_bandwidth_slice;
-#endif
-
-extern int sysctl_sched_rr_timeslice;
-extern int sched_rr_timeslice;
-
-int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
- size_t *lenp, loff_t *ppos);
-int sched_rt_handler(struct ctl_table *table, int write, void *buffer,
- size_t *lenp, loff_t *ppos);
-int sysctl_sched_uclamp_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
int sysctl_numa_balancing(struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos);
-int sysctl_schedstats(struct ctl_table *table, int write, void *buffer,
- size_t *lenp, loff_t *ppos);
-
-#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
-extern unsigned int sysctl_sched_energy_aware;
-int sched_energy_aware_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
-#endif
#endif /* _LINUX_SCHED_SYSCTL_H */
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 32b35f21cb97..da21d63f70e2 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -352,28 +352,13 @@ void wb_domain_exit(struct wb_domain *dom);
extern struct wb_domain global_wb_domain;
/* These are exported to sysctl. */
-extern int dirty_background_ratio;
-extern unsigned long dirty_background_bytes;
-extern int vm_dirty_ratio;
-extern unsigned long vm_dirty_bytes;
extern unsigned int dirty_writeback_interval;
extern unsigned int dirty_expire_interval;
extern unsigned int dirtytime_expire_interval;
-extern int vm_highmem_is_dirtyable;
extern int laptop_mode;
-int dirty_background_ratio_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
-int dirty_background_bytes_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
-int dirty_ratio_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
-int dirty_bytes_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
int dirtytime_interval_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos);
-int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty);
unsigned long wb_calc_thresh(struct bdi_writeback *wb, unsigned long thresh);
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 533d81ed74d4..327962ea354c 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -14,12 +14,32 @@
unsigned long initrd_start, initrd_end;
int initrd_below_start_ok;
-unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
+static unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
static int __initdata mount_initrd = 1;
phys_addr_t phys_initrd_start __initdata;
unsigned long phys_initrd_size __initdata;
+#ifdef CONFIG_SYSCTL
+static struct ctl_table kern_do_mounts_initrd_table[] = {
+ {
+ .procname = "real-root-dev",
+ .data = &real_root_dev,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ { }
+};
+
+static __init int kernel_do_mounts_initrd_sysctls_init(void)
+{
+ register_sysctl_init("kernel", kern_do_mounts_initrd_table);
+ return 0;
+}
+late_initcall(kernel_do_mounts_initrd_sysctls_init);
+#endif /* CONFIG_SYSCTL */
+
static int __init no_initrd(char *str)
{
mount_initrd = 0;
diff --git a/kernel/acct.c b/kernel/acct.c
index 3df53cf1dcd5..13706356ec54 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -70,11 +70,31 @@
* Turned into sysctl-controllable parameters. AV, 12/11/98
*/
-int acct_parm[3] = {4, 2, 30};
+static int acct_parm[3] = {4, 2, 30};
#define RESUME (acct_parm[0]) /* >foo% free space - resume */
#define SUSPEND (acct_parm[1]) /* <foo% free space - suspend */
#define ACCT_TIMEOUT (acct_parm[2]) /* foo second timeout between checks */
+#ifdef CONFIG_SYSCTL
+static struct ctl_table kern_acct_table[] = {
+ {
+ .procname = "acct",
+ .data = &acct_parm,
+ .maxlen = 3*sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ { }
+};
+
+static __init int kernel_acct_sysctls_init(void)
+{
+ register_sysctl_init("kernel", kern_acct_table);
+ return 0;
+}
+late_initcall(kernel_acct_sysctls_init);
+#endif /* CONFIG_SYSCTL */
+
/*
* External references and all of the globals.
*/
diff --git a/kernel/delayacct.c b/kernel/delayacct.c
index c5e8cea9e05f..2c1e18f7c5cf 100644
--- a/kernel/delayacct.c
+++ b/kernel/delayacct.c
@@ -44,7 +44,7 @@ void delayacct_init(void)
}
#ifdef CONFIG_PROC_SYSCTL
-int sysctl_delayacct(struct ctl_table *table, int write, void *buffer,
+static int sysctl_delayacct(struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
int state = delayacct_on;
@@ -63,6 +63,26 @@ int sysctl_delayacct(struct ctl_table *table, int write, void *buffer,
set_delayacct(state);
return err;
}
+
+static struct ctl_table kern_delayacct_table[] = {
+ {
+ .procname = "task_delayacct",
+ .data = NULL,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_delayacct,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ { }
+};
+
+static __init int kernel_delayacct_sysctls_init(void)
+{
+ register_sysctl_init("kernel", kern_delayacct_table);
+ return 0;
+}
+late_initcall(kernel_delayacct_sysctls_init);
#endif
void __delayacct_tsk_init(struct task_struct *tsk)
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index be4b54c2c615..8b3e9a2014cf 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -936,6 +936,28 @@ int kimage_load_segment(struct kimage *image,
struct kimage *kexec_image;
struct kimage *kexec_crash_image;
int kexec_load_disabled;
+#ifdef CONFIG_SYSCTL
+static struct ctl_table kexec_core_sysctls[] = {
+ {
+ .procname = "kexec_load_disabled",
+ .data = &kexec_load_disabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ /* only handle a transition from default "0" to "1" */
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ .extra2 = SYSCTL_ONE,
+ },
+ { }
+};
+
+static int __init kexec_core_sysctl_init(void)
+{
+ register_sysctl_init("kernel", kexec_core_sysctls);
+ return 0;
+}
+late_initcall(kexec_core_sysctl_init);
+#endif
/*
* No panic_cpu check version of crash_kexec(). This function is called
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index 166d7bf49666..76166df011a4 100644
--- a/kernel/latencytop.c
+++ b/kernel/latencytop.c
@@ -55,6 +55,7 @@
#include <linux/sched/stat.h>
#include <linux/list.h>
#include <linux/stacktrace.h>
+#include <linux/sysctl.h>
static DEFINE_RAW_SPINLOCK(latency_lock);
@@ -63,6 +64,31 @@ static struct latency_record latency_record[MAXLR];
int latencytop_enabled;
+#ifdef CONFIG_SYSCTL
+static int sysctl_latencytop(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ int err;
+
+ err = proc_dointvec(table, write, buffer, lenp, ppos);
+ if (latencytop_enabled)
+ force_schedstat_enabled();
+
+ return err;
+}
+
+static struct ctl_table latencytop_sysctl[] = {
+ {
+ .procname = "latencytop",
+ .data = &latencytop_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = sysctl_latencytop,
+ },
+ {}
+};
+#endif
+
void clear_tsk_latency_tracing(struct task_struct *p)
{
unsigned long flags;
@@ -266,18 +292,9 @@ static const struct proc_ops lstats_proc_ops = {
static int __init init_lstats_procfs(void)
{
proc_create("latency_stats", 0644, NULL, &lstats_proc_ops);
+#ifdef CONFIG_SYSCTL
+ register_sysctl_init("kernel", latencytop_sysctl);
+#endif
return 0;
}
-
-int sysctl_latencytop(struct ctl_table *table, int write, void *buffer,
- size_t *lenp, loff_t *ppos)
-{
- int err;
-
- err = proc_dointvec(table, write, buffer, lenp, ppos);
- if (latencytop_enabled)
- force_schedstat_enabled();
-
- return err;
-}
device_initcall(init_lstats_procfs);
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index a6e671b8608d..81e87280513e 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -63,19 +63,50 @@
#include <trace/events/lock.h>
#ifdef CONFIG_PROVE_LOCKING
-int prove_locking = 1;
+static int prove_locking = 1;
module_param(prove_locking, int, 0644);
#else
#define prove_locking 0
#endif
#ifdef CONFIG_LOCK_STAT
-int lock_stat = 1;
+static int lock_stat = 1;
module_param(lock_stat, int, 0644);
#else
#define lock_stat 0
#endif
+#ifdef CONFIG_SYSCTL
+static struct ctl_table kern_lockdep_table[] = {
+#ifdef CONFIG_PROVE_LOCKING
+ {
+ .procname = "prove_locking",
+ .data = &prove_locking,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif /* CONFIG_PROVE_LOCKING */
+#ifdef CONFIG_LOCK_STAT
+ {
+ .procname = "lock_stat",
+ .data = &lock_stat,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif /* CONFIG_LOCK_STAT */
+ { }
+};
+
+static __init int kernel_lockdep_sysctls_init(void)
+{
+ register_sysctl_init("kernel", kern_lockdep_table);
+ return 0;
+}
+late_initcall(kernel_lockdep_sysctls_init);
+#endif /* CONFIG_SYSCTL */
+
DEFINE_PER_CPU(unsigned int, lockdep_recursion);
EXPORT_PER_CPU_SYMBOL_GPL(lockdep_recursion);
diff --git a/kernel/panic.c b/kernel/panic.c
index 6737b2332275..a3c758dba15a 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -43,7 +43,9 @@
* Should we dump all CPUs backtraces in an oops event?
* Defaults to 0, can be changed via sysctl.
*/
-unsigned int __read_mostly sysctl_oops_all_cpu_backtrace;
+static unsigned int __read_mostly sysctl_oops_all_cpu_backtrace;
+#else
+#define sysctl_oops_all_cpu_backtrace 0
#endif /* CONFIG_SMP */
int panic_on_oops = CONFIG_PANIC_ON_OOPS_VALUE;
@@ -73,6 +75,28 @@ ATOMIC_NOTIFIER_HEAD(panic_notifier_list);
EXPORT_SYMBOL(panic_notifier_list);
+#if defined(CONFIG_SMP) && defined(CONFIG_SYSCTL)
+static struct ctl_table kern_panic_table[] = {
+ {
+ .procname = "oops_all_cpu_backtrace",
+ .data = &sysctl_oops_all_cpu_backtrace,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ { }
+};
+
+static __init int kernel_panic_sysctls_init(void)
+{
+ register_sysctl_init("kernel", kern_panic_table);
+ return 0;
+}
+late_initcall(kernel_panic_sysctls_init);
+#endif
+
static long no_blink(int state)
{
return 0;
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index 152492d52715..4916077119f3 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -23,6 +23,8 @@
#define RCU_SEQ_CTR_SHIFT 2
#define RCU_SEQ_STATE_MASK ((1 << RCU_SEQ_CTR_SHIFT) - 1)
+extern int sysctl_sched_rt_runtime;
+
/*
* Return the counter portion of a sequence number previously returned
* by rcu_seq_snap() or rcu_seq_current().
diff --git a/kernel/reboot.c b/kernel/reboot.c
index 4177645e74d6..44228a93742b 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -23,7 +23,7 @@
* this indicates whether you can reboot with ctrl-alt-del: the default is yes
*/
-int C_A_D = 1;
+static int C_A_D = 1;
struct pid *cad_pid;
EXPORT_SYMBOL(cad_pid);
@@ -417,7 +417,8 @@ void ctrl_alt_del(void)
kill_cad_pid(SIGINT, 1);
}
-char poweroff_cmd[POWEROFF_CMD_PATH_LEN] = "/sbin/poweroff";
+#define POWEROFF_CMD_PATH_LEN 256
+static char poweroff_cmd[POWEROFF_CMD_PATH_LEN] = "/sbin/poweroff";
static const char reboot_cmd[] = "/sbin/reboot";
static int run_cmd(const char *cmd)
@@ -879,6 +880,33 @@ static struct attribute *reboot_attrs[] = {
NULL,
};
+#ifdef CONFIG_SYSCTL
+static struct ctl_table kern_reboot_table[] = {
+ {
+ .procname = "poweroff_cmd",
+ .data = &poweroff_cmd,
+ .maxlen = POWEROFF_CMD_PATH_LEN,
+ .mode = 0644,
+ .proc_handler = proc_dostring,
+ },
+ {
+ .procname = "ctrl-alt-del",
+ .data = &C_A_D,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ { }
+};
+
+static void __init kernel_reboot_sysctls_init(void)
+{
+ register_sysctl_init("kernel", kern_reboot_table);
+}
+#else
+#define kernel_reboot_sysctls_init() do { } while (0)
+#endif /* CONFIG_SYSCTL */
+
static const struct attribute_group reboot_attr_group = {
.attrs = reboot_attrs,
};
@@ -898,6 +926,8 @@ static int __init reboot_ksysfs_init(void)
return ret;
}
+ kernel_reboot_sysctls_init();
+
return 0;
}
late_initcall(reboot_ksysfs_init);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a247f8d9d417..696c6490bd5b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -148,12 +148,6 @@ const_debug unsigned int sysctl_sched_nr_migrate = 8;
const_debug unsigned int sysctl_sched_nr_migrate = 32;
#endif
-/*
- * period over which we measure -rt task CPU usage in us.
- * default: 1s
- */
-unsigned int sysctl_sched_rt_period = 1000000;
-
__read_mostly int scheduler_running;
#ifdef CONFIG_SCHED_CORE
@@ -447,13 +441,6 @@ sched_core_dequeue(struct rq *rq, struct task_struct *p, int flags) { }
#endif /* CONFIG_SCHED_CORE */
-/*
- * part of the period that we allow rt tasks to run in us.
- * default: 0.95s
- */
-int sysctl_sched_rt_runtime = 950000;
-
-
/*
* Serialization rules:
*
@@ -1322,10 +1309,10 @@ static void set_load_weight(struct task_struct *p, bool update_load)
static DEFINE_MUTEX(uclamp_mutex);
/* Max allowed minimum utilization */
-unsigned int sysctl_sched_uclamp_util_min = SCHED_CAPACITY_SCALE;
+static unsigned int __maybe_unused sysctl_sched_uclamp_util_min = SCHED_CAPACITY_SCALE;
/* Max allowed maximum utilization */
-unsigned int sysctl_sched_uclamp_util_max = SCHED_CAPACITY_SCALE;
+static unsigned int __maybe_unused sysctl_sched_uclamp_util_max = SCHED_CAPACITY_SCALE;
/*
* By default RT tasks run at the maximum performance point/capacity of the
@@ -1342,7 +1329,7 @@ unsigned int sysctl_sched_uclamp_util_max = SCHED_CAPACITY_SCALE;
* This knob will not override the system default sched_util_clamp_min defined
* above.
*/
-unsigned int sysctl_sched_uclamp_util_min_rt_default = SCHED_CAPACITY_SCALE;
+static unsigned int sysctl_sched_uclamp_util_min_rt_default = SCHED_CAPACITY_SCALE;
/* All clamps are required to be less or equal than these values */
static struct uclamp_se uclamp_default[UCLAMP_CNT];
@@ -1472,33 +1459,6 @@ static void uclamp_update_util_min_rt_default(struct task_struct *p)
task_rq_unlock(rq, p, &rf);
}
-static void uclamp_sync_util_min_rt_default(void)
-{
- struct task_struct *g, *p;
-
- /*
- * copy_process() sysctl_uclamp
- * uclamp_min_rt = X;
- * write_lock(&tasklist_lock) read_lock(&tasklist_lock)
- * // link thread smp_mb__after_spinlock()
- * write_unlock(&tasklist_lock) read_unlock(&tasklist_lock);
- * sched_post_fork() for_each_process_thread()
- * __uclamp_sync_rt() __uclamp_sync_rt()
- *
- * Ensures that either sched_post_fork() will observe the new
- * uclamp_min_rt or for_each_process_thread() will observe the new
- * task.
- */
- read_lock(&tasklist_lock);
- smp_mb__after_spinlock();
- read_unlock(&tasklist_lock);
-
- rcu_read_lock();
- for_each_process_thread(g, p)
- uclamp_update_util_min_rt_default(p);
- rcu_read_unlock();
-}
-
static inline struct uclamp_se
uclamp_tg_restrict(struct task_struct *p, enum uclamp_id clamp_id)
{
@@ -1778,6 +1738,11 @@ uclamp_update_active_tasks(struct cgroup_subsys_state *css)
}
static void cpu_util_update_eff(struct cgroup_subsys_state *css);
+#endif
+
+#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_UCLAMP_TASK
+#ifdef CONFIG_UCLAMP_TASK_GROUP
static void uclamp_update_root_tg(void)
{
struct task_group *tg = &root_task_group;
@@ -1795,7 +1760,34 @@ static void uclamp_update_root_tg(void)
static void uclamp_update_root_tg(void) { }
#endif
-int sysctl_sched_uclamp_handler(struct ctl_table *table, int write,
+static void uclamp_sync_util_min_rt_default(void)
+{
+ struct task_struct *g, *p;
+
+ /*
+ * copy_process() sysctl_uclamp
+ * uclamp_min_rt = X;
+ * write_lock(&tasklist_lock) read_lock(&tasklist_lock)
+ * // link thread smp_mb__after_spinlock()
+ * write_unlock(&tasklist_lock) read_unlock(&tasklist_lock);
+ * sched_post_fork() for_each_process_thread()
+ * __uclamp_sync_rt() __uclamp_sync_rt()
+ *
+ * Ensures that either sched_post_fork() will observe the new
+ * uclamp_min_rt or for_each_process_thread() will observe the new
+ * task.
+ */
+ read_lock(&tasklist_lock);
+ smp_mb__after_spinlock();
+ read_unlock(&tasklist_lock);
+
+ rcu_read_lock();
+ for_each_process_thread(g, p)
+ uclamp_update_util_min_rt_default(p);
+ rcu_read_unlock();
+}
+
+static int sysctl_sched_uclamp_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
bool update_root_tg = false;
@@ -1859,6 +1851,8 @@ done:
return result;
}
+#endif
+#endif
static int uclamp_validate(struct task_struct *p,
const struct sched_attr *attr)
@@ -4433,7 +4427,7 @@ out:
__setup("schedstats=", setup_schedstats);
#ifdef CONFIG_PROC_SYSCTL
-int sysctl_schedstats(struct ctl_table *table, int write, void *buffer,
+static int sysctl_schedstats(struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
struct ctl_table t;
@@ -4455,6 +4449,52 @@ int sysctl_schedstats(struct ctl_table *table, int write, void *buffer,
#endif /* CONFIG_PROC_SYSCTL */
#endif /* CONFIG_SCHEDSTATS */
+#ifdef CONFIG_SYSCTL
+static struct ctl_table sched_core_sysctls[] = {
+#ifdef CONFIG_SCHEDSTATS
+ {
+ .procname = "sched_schedstats",
+ .data = NULL,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_schedstats,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif /* CONFIG_SCHEDSTATS */
+#ifdef CONFIG_UCLAMP_TASK
+ {
+ .procname = "sched_util_clamp_min",
+ .data = &sysctl_sched_uclamp_util_min,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_sched_uclamp_handler,
+ },
+ {
+ .procname = "sched_util_clamp_max",
+ .data = &sysctl_sched_uclamp_util_max,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_sched_uclamp_handler,
+ },
+ {
+ .procname = "sched_util_clamp_min_rt_default",
+ .data = &sysctl_sched_uclamp_util_min_rt_default,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_sched_uclamp_handler,
+ },
+#endif /* CONFIG_UCLAMP_TASK */
+ {}
+};
+static int __init sched_core_sysctl_init(void)
+{
+ register_sysctl_init("kernel", sched_core_sysctls);
+ return 0;
+}
+late_initcall(sched_core_sysctl_init);
+#endif /* CONFIG_SYSCTL */
+
/*
* fork()/clone()-time setup:
*/
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 936817ae142f..b5152961b743 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -16,6 +16,40 @@
* Fabio Checconi <fchecconi@gmail.com>
*/
+/*
+ * Default limits for DL period; on the top end we guard against small util
+ * tasks still getting ridiculously long effective runtimes, on the bottom end we
+ * guard against timer DoS.
+ */
+static unsigned int sysctl_sched_dl_period_max = 1 << 22; /* ~4 seconds */
+static unsigned int sysctl_sched_dl_period_min = 100; /* 100 us */
+#ifdef CONFIG_SYSCTL
+static struct ctl_table sched_dl_sysctls[] = {
+ {
+ .procname = "sched_deadline_period_max_us",
+ .data = &sysctl_sched_dl_period_max,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "sched_deadline_period_min_us",
+ .data = &sysctl_sched_dl_period_min,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {}
+};
+
+static int __init sched_dl_sysctl_init(void)
+{
+ register_sysctl_init("kernel", sched_dl_sysctls);
+ return 0;
+}
+late_initcall(sched_dl_sysctl_init);
+#endif
+
static inline struct task_struct *dl_task_of(struct sched_dl_entity *dl_se)
{
return container_of(dl_se, struct task_struct, dl);
@@ -2872,14 +2906,6 @@ void __getparam_dl(struct task_struct *p, struct sched_attr *attr)
attr->sched_flags |= dl_se->flags;
}
-/*
- * Default limits for DL period; on the top end we guard against small util
- * tasks still getting ridiculously long effective runtimes, on the bottom end we
- * guard against timer DoS.
- */
-unsigned int sysctl_sched_dl_period_max = 1 << 22; /* ~4 seconds */
-unsigned int sysctl_sched_dl_period_min = 100; /* 100 us */
-
/*
* This function validates the new parameters of a -deadline task.
* We ask for the deadline not being zero, and greater or equal
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 906b2c7c48d1..8c5b74f66bd3 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -174,7 +174,37 @@ int __weak arch_asym_cpu_priority(int cpu)
*
* (default: 5 msec, units: microseconds)
*/
-unsigned int sysctl_sched_cfs_bandwidth_slice = 5000UL;
+static unsigned int sysctl_sched_cfs_bandwidth_slice = 5000UL;
+#endif
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table sched_fair_sysctls[] = {
+ {
+ .procname = "sched_child_runs_first",
+ .data = &sysctl_sched_child_runs_first,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#ifdef CONFIG_CFS_BANDWIDTH
+ {
+ .procname = "sched_cfs_bandwidth_slice_us",
+ .data = &sysctl_sched_cfs_bandwidth_slice,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ },
+#endif
+ {}
+};
+
+static int __init sched_fair_sysctl_init(void)
+{
+ register_sysctl_init("kernel", sched_fair_sysctls);
+ return 0;
+}
+late_initcall(sched_fair_sysctl_init);
#endif
static inline void update_load_add(struct load_weight *lw, unsigned long inc)
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 7891c0f0e1ff..8c9ed9664840 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -5,7 +5,6 @@
*/
int sched_rr_timeslice = RR_TIMESLICE;
-int sysctl_sched_rr_timeslice = (MSEC_PER_SEC / HZ) * RR_TIMESLICE;
/* More than 4 hours if BW_SHIFT equals 20. */
static const u64 max_rt_runtime = MAX_BW;
@@ -13,6 +12,57 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun);
struct rt_bandwidth def_rt_bandwidth;
+/*
+ * period over which we measure -rt task CPU usage in us.
+ * default: 1s
+ */
+unsigned int sysctl_sched_rt_period = 1000000;
+
+/*
+ * part of the period that we allow rt tasks to run in us.
+ * default: 0.95s
+ */
+int sysctl_sched_rt_runtime = 950000;
+
+#ifdef CONFIG_SYSCTL
+static int sysctl_sched_rr_timeslice = (MSEC_PER_SEC / HZ) * RR_TIMESLICE;
+static int sched_rt_handler(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos);
+static int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos);
+static struct ctl_table sched_rt_sysctls[] = {
+ {
+ .procname = "sched_rt_period_us",
+ .data = &sysctl_sched_rt_period,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sched_rt_handler,
+ },
+ {
+ .procname = "sched_rt_runtime_us",
+ .data = &sysctl_sched_rt_runtime,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = sched_rt_handler,
+ },
+ {
+ .procname = "sched_rr_timeslice_ms",
+ .data = &sysctl_sched_rr_timeslice,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = sched_rr_handler,
+ },
+ {}
+};
+
+static int __init sched_rt_sysctl_init(void)
+{
+ register_sysctl_init("kernel", sched_rt_sysctls);
+ return 0;
+}
+late_initcall(sched_rt_sysctl_init);
+#endif
+
static enum hrtimer_restart sched_rt_period_timer(struct hrtimer *timer)
{
struct rt_bandwidth *rt_b =
@@ -2862,6 +2912,7 @@ long sched_group_rt_period(struct task_group *tg)
return rt_period_us;
}
+#ifdef CONFIG_SYSCTL
static int sched_rt_global_constraints(void)
{
int ret = 0;
@@ -2872,6 +2923,7 @@ static int sched_rt_global_constraints(void)
return ret;
}
+#endif /* CONFIG_SYSCTL */
int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk)
{
@@ -2883,6 +2935,8 @@ int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk)
}
#else /* !CONFIG_RT_GROUP_SCHED */
+
+#ifdef CONFIG_SYSCTL
static int sched_rt_global_constraints(void)
{
unsigned long flags;
@@ -2900,8 +2954,10 @@ static int sched_rt_global_constraints(void)
return 0;
}
+#endif /* CONFIG_SYSCTL */
#endif /* CONFIG_RT_GROUP_SCHED */
+#ifdef CONFIG_SYSCTL
static int sched_rt_global_validate(void)
{
if (sysctl_sched_rt_period <= 0)
@@ -2926,7 +2982,7 @@ static void sched_rt_do_global(void)
raw_spin_unlock_irqrestore(&def_rt_bandwidth.rt_runtime_lock, flags);
}
-int sched_rt_handler(struct ctl_table *table, int write, void *buffer,
+static int sched_rt_handler(struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
int old_period, old_runtime;
@@ -2965,7 +3021,7 @@ undo:
return ret;
}
-int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
+static int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
int ret;
@@ -2986,6 +3042,7 @@ int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
return ret;
}
+#endif /* CONFIG_SYSCTL */
#ifdef CONFIG_SCHED_DEBUG
void print_rt_stats(struct seq_file *m, int cpu)
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 2ce18584dca3..01259611beb9 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -108,10 +108,17 @@ extern __read_mostly int scheduler_running;
extern unsigned long calc_load_update;
extern atomic_long_t calc_load_tasks;
+extern unsigned int sysctl_sched_child_runs_first;
+
extern void calc_global_load_tick(struct rq *this_rq);
extern long calc_load_fold_active(struct rq *this_rq, long adjust);
extern void call_trace_sched_update_nr_running(struct rq *rq, int count);
+
+extern unsigned int sysctl_sched_rt_period;
+extern int sysctl_sched_rt_runtime;
+extern int sched_rr_timeslice;
+
/*
* Helpers for converting nanosecond timing to jiffy resolution
*/
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 810750e62118..05b6c2ad90b9 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -206,7 +206,7 @@ sd_parent_degenerate(struct sched_domain *sd, struct sched_domain *parent)
#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
DEFINE_STATIC_KEY_FALSE(sched_energy_present);
-unsigned int sysctl_sched_energy_aware = 1;
+static unsigned int sysctl_sched_energy_aware = 1;
DEFINE_MUTEX(sched_energy_mutex);
bool sched_energy_update;
@@ -220,7 +220,7 @@ void rebuild_sched_domains_energy(void)
}
#ifdef CONFIG_PROC_SYSCTL
-int sched_energy_aware_handler(struct ctl_table *table, int write,
+static int sched_energy_aware_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret, state;
@@ -237,6 +237,27 @@ int sched_energy_aware_handler(struct ctl_table *table, int write,
return ret;
}
+
+static struct ctl_table sched_energy_aware_sysctls[] = {
+ {
+ .procname = "sched_energy_aware",
+ .data = &sysctl_sched_energy_aware,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sched_energy_aware_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {}
+};
+
+static int __init sched_energy_aware_sysctl_init(void)
+{
+ register_sysctl_init("kernel", sched_energy_aware_sysctls);
+ return 0;
+}
+
+late_initcall(sched_energy_aware_sysctl_init);
#endif
static void free_pd(struct perf_domain *pd)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 82bcf5e3009f..e52b6e372c60 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -61,12 +61,9 @@
#include <linux/capability.h>
#include <linux/binfmts.h>
#include <linux/sched/sysctl.h>
-#include <linux/kexec.h>
#include <linux/mount.h>
#include <linux/userfaultfd_k.h>
-#include <linux/latencytop.h>
#include <linux/pid.h>
-#include <linux/delayacct.h>
#include "../lib/kstrtox.h"
@@ -81,15 +78,9 @@
#ifdef CONFIG_SPARC
#include <asm/setup.h>
#endif
-#ifdef CONFIG_BSD_PROCESS_ACCT
-#include <linux/acct.h>
-#endif
#ifdef CONFIG_RT_MUTEXES
#include <linux/rtmutex.h>
#endif
-#if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT)
-#include <linux/lockdep.h>
-#endif
#if defined(CONFIG_SYSCTL)
@@ -99,8 +90,6 @@
static const int six_hundred_forty_kb = 640 * 1024;
#endif
-/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
-static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
static const int ngroups_max = NGROUPS_MAX;
static const int cap_last_cap = CAP_LAST_CAP;
@@ -1598,35 +1587,6 @@ int proc_do_static_key(struct ctl_table *table, int write,
}
static struct ctl_table kern_table[] = {
- {
- .procname = "sched_child_runs_first",
- .data = &sysctl_sched_child_runs_first,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#ifdef CONFIG_SCHEDSTATS
- {
- .procname = "sched_schedstats",
- .data = NULL,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_schedstats,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif /* CONFIG_SCHEDSTATS */
-#ifdef CONFIG_TASK_DELAY_ACCT
- {
- .procname = "task_delayacct",
- .data = NULL,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_delayacct,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif /* CONFIG_TASK_DELAY_ACCT */
#ifdef CONFIG_NUMA_BALANCING
{
.procname = "numa_balancing",
@@ -1638,103 +1598,6 @@ static struct ctl_table kern_table[] = {
.extra2 = SYSCTL_FOUR,
},
#endif /* CONFIG_NUMA_BALANCING */
- {
- .procname = "sched_rt_period_us",
- .data = &sysctl_sched_rt_period,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_rt_handler,
- },
- {
- .procname = "sched_rt_runtime_us",
- .data = &sysctl_sched_rt_runtime,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = sched_rt_handler,
- },
- {
- .procname = "sched_deadline_period_max_us",
- .data = &sysctl_sched_dl_period_max,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "sched_deadline_period_min_us",
- .data = &sysctl_sched_dl_period_min,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "sched_rr_timeslice_ms",
- .data = &sysctl_sched_rr_timeslice,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = sched_rr_handler,
- },
-#ifdef CONFIG_UCLAMP_TASK
- {
- .procname = "sched_util_clamp_min",
- .data = &sysctl_sched_uclamp_util_min,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_sched_uclamp_handler,
- },
- {
- .procname = "sched_util_clamp_max",
- .data = &sysctl_sched_uclamp_util_max,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_sched_uclamp_handler,
- },
- {
- .procname = "sched_util_clamp_min_rt_default",
- .data = &sysctl_sched_uclamp_util_min_rt_default,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_sched_uclamp_handler,
- },
-#endif
-#ifdef CONFIG_CFS_BANDWIDTH
- {
- .procname = "sched_cfs_bandwidth_slice_us",
- .data = &sysctl_sched_cfs_bandwidth_slice,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- },
-#endif
-#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
- {
- .procname = "sched_energy_aware",
- .data = &sysctl_sched_energy_aware,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_energy_aware_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_PROVE_LOCKING
- {
- .procname = "prove_locking",
- .data = &prove_locking,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_LOCK_STAT
- {
- .procname = "lock_stat",
- .data = &lock_stat,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
{
.procname = "panic",
.data = &panic_timeout,
@@ -1758,24 +1621,6 @@ static struct ctl_table kern_table[] = {
.extra1 = SYSCTL_NEG_ONE,
.extra2 = SYSCTL_ONE,
},
-#endif
-#ifdef CONFIG_LATENCYTOP
- {
- .procname = "latencytop",
- .data = &latencytop_enabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = sysctl_latencytop,
- },
-#endif
-#ifdef CONFIG_BLK_DEV_INITRD
- {
- .procname = "real-root-dev",
- .data = &real_root_dev,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
#endif
{
.procname = "print-fatal-signals",
@@ -1833,22 +1678,6 @@ static struct ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
-#endif
- {
- .procname = "ctrl-alt-del",
- .data = &C_A_D,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#ifdef CONFIG_FUNCTION_TRACER
- {
- .procname = "ftrace_enabled",
- .data = &ftrace_enabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = ftrace_enable_sysctl,
- },
#endif
#ifdef CONFIG_STACK_TRACER
{
@@ -1882,18 +1711,6 @@ static struct ctl_table kern_table[] = {
.proc_handler = tracepoint_printk_sysctl,
},
#endif
-#ifdef CONFIG_KEXEC_CORE
- {
- .procname = "kexec_load_disabled",
- .data = &kexec_load_disabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- /* only handle a transition from default "0" to "1" */
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- .extra2 = SYSCTL_ONE,
- },
-#endif
#ifdef CONFIG_MODULES
{
.procname = "modprobe",
@@ -1922,15 +1739,6 @@ static struct ctl_table kern_table[] = {
.proc_handler = proc_dostring,
},
#endif
-#ifdef CONFIG_BSD_PROCESS_ACCT
- {
- .procname = "acct",
- .data = &acct_parm,
- .maxlen = 3*sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
#ifdef CONFIG_MAGIC_SYSRQ
{
.procname = "sysrq",
@@ -1988,17 +1796,6 @@ static struct ctl_table kern_table[] = {
.proc_handler = proc_dointvec,
},
#endif
-#ifdef CONFIG_SMP
- {
- .procname = "oops_all_cpu_backtrace",
- .data = &sysctl_oops_all_cpu_backtrace,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif /* CONFIG_SMP */
{
.procname = "pid_max",
.data = &pid_max,
@@ -2147,13 +1944,6 @@ static struct ctl_table kern_table[] = {
.proc_handler = proc_dointvec,
},
#endif
- {
- .procname = "poweroff_cmd",
- .data = &poweroff_cmd,
- .maxlen = POWEROFF_CMD_PATH_LEN,
- .mode = 0644,
- .proc_handler = proc_dostring,
- },
#ifdef CONFIG_KEYS
{
.procname = "keys",
@@ -2262,29 +2052,6 @@ static struct ctl_table vm_table[] = {
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_TWO,
},
- {
- .procname = "panic_on_oom",
- .data = &sysctl_panic_on_oom,
- .maxlen = sizeof(sysctl_panic_on_oom),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_TWO,
- },
- {
- .procname = "oom_kill_allocating_task",
- .data = &sysctl_oom_kill_allocating_task,
- .maxlen = sizeof(sysctl_oom_kill_allocating_task),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "oom_dump_tasks",
- .data = &sysctl_oom_dump_tasks,
- .maxlen = sizeof(sysctl_oom_dump_tasks),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
{
.procname = "overcommit_ratio",
.data = &sysctl_overcommit_ratio,
@@ -2307,55 +2074,6 @@ static struct ctl_table vm_table[] = {
.proc_handler = proc_dointvec_minmax,
.extra1 = SYSCTL_ZERO,
},
- {
- .procname = "dirty_background_ratio",
- .data = &dirty_background_ratio,
- .maxlen = sizeof(dirty_background_ratio),
- .mode = 0644,
- .proc_handler = dirty_background_ratio_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE_HUNDRED,
- },
- {
- .procname = "dirty_background_bytes",
- .data = &dirty_background_bytes,
- .maxlen = sizeof(dirty_background_bytes),
- .mode = 0644,
- .proc_handler = dirty_background_bytes_handler,
- .extra1 = SYSCTL_LONG_ONE,
- },
- {
- .procname = "dirty_ratio",
- .data = &vm_dirty_ratio,
- .maxlen = sizeof(vm_dirty_ratio),
- .mode = 0644,
- .proc_handler = dirty_ratio_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE_HUNDRED,
- },
- {
- .procname = "dirty_bytes",
- .data = &vm_dirty_bytes,
- .maxlen = sizeof(vm_dirty_bytes),
- .mode = 0644,
- .proc_handler = dirty_bytes_handler,
- .extra1 = (void *)&dirty_bytes_min,
- },
- {
- .procname = "dirty_writeback_centisecs",
- .data = &dirty_writeback_interval,
- .maxlen = sizeof(dirty_writeback_interval),
- .mode = 0644,
- .proc_handler = dirty_writeback_centisecs_handler,
- },
- {
- .procname = "dirty_expire_centisecs",
- .data = &dirty_expire_interval,
- .maxlen = sizeof(dirty_expire_interval),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- },
{
.procname = "dirtytime_expire_seconds",
.data = &dirtytime_expire_interval,
@@ -2527,13 +2245,6 @@ static struct ctl_table vm_table[] = {
.extra1 = SYSCTL_ZERO,
},
#endif
- {
- .procname = "laptop_mode",
- .data = &laptop_mode,
- .maxlen = sizeof(laptop_mode),
- .mode = 0644,
- .proc_handler = proc_dointvec_jiffies,
- },
{
.procname = "vfs_cache_pressure",
.data = &sysctl_vfs_cache_pressure,
@@ -2631,17 +2342,6 @@ static struct ctl_table vm_table[] = {
.extra1 = SYSCTL_ZERO,
},
#endif
-#ifdef CONFIG_HIGHMEM
- {
- .procname = "highmem_is_dirtyable",
- .data = &vm_highmem_is_dirtyable,
- .maxlen = sizeof(vm_highmem_is_dirtyable),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
#ifdef CONFIG_MEMORY_FAILURE
{
.procname = "memory_failure_early_kill",
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 674add0aafb3..f8db59c3a601 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -86,7 +86,7 @@ struct ftrace_ops ftrace_list_end __read_mostly = {
/* ftrace_enabled is a method to turn ftrace on or off */
int ftrace_enabled __read_mostly;
-static int last_ftrace_enabled;
+static int __maybe_unused last_ftrace_enabled;
/* Current function tracing op */
struct ftrace_ops *function_trace_op __read_mostly = &ftrace_list_end;
@@ -3065,40 +3065,6 @@ int ftrace_shutdown(struct ftrace_ops *ops, int command)
return 0;
}
-static void ftrace_startup_sysctl(void)
-{
- int command;
-
- if (unlikely(ftrace_disabled))
- return;
-
- /* Force update next time */
- saved_ftrace_func = NULL;
- /* ftrace_start_up is true if we want ftrace running */
- if (ftrace_start_up) {
- command = FTRACE_UPDATE_CALLS;
- if (ftrace_graph_active)
- command |= FTRACE_START_FUNC_RET;
- ftrace_startup_enable(command);
- }
-}
-
-static void ftrace_shutdown_sysctl(void)
-{
- int command;
-
- if (unlikely(ftrace_disabled))
- return;
-
- /* ftrace_start_up is true if ftrace is running */
- if (ftrace_start_up) {
- command = FTRACE_DISABLE_CALLS;
- if (ftrace_graph_active)
- command |= FTRACE_STOP_FUNC_RET;
- ftrace_run_update_code(command);
- }
-}
-
static u64 ftrace_update_time;
unsigned long ftrace_update_tot_cnt;
unsigned long ftrace_number_of_pages;
@@ -7267,9 +7233,6 @@ core_initcall(ftrace_nodyn_init);
static inline int ftrace_init_dyn_tracefs(struct dentry *d_tracer) { return 0; }
static inline void ftrace_startup_all(int command) { }
-# define ftrace_startup_sysctl() do { } while (0)
-# define ftrace_shutdown_sysctl() do { } while (0)
-
static void ftrace_update_trampoline(struct ftrace_ops *ops)
{
}
@@ -7909,62 +7872,6 @@ int unregister_ftrace_function(struct ftrace_ops *ops)
}
EXPORT_SYMBOL_GPL(unregister_ftrace_function);
-static bool is_permanent_ops_registered(void)
-{
- struct ftrace_ops *op;
-
- do_for_each_ftrace_op(op, ftrace_ops_list) {
- if (op->flags & FTRACE_OPS_FL_PERMANENT)
- return true;
- } while_for_each_ftrace_op(op);
-
- return false;
-}
-
-int
-ftrace_enable_sysctl(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos)
-{
- int ret = -ENODEV;
-
- mutex_lock(&ftrace_lock);
-
- if (unlikely(ftrace_disabled))
- goto out;
-
- ret = proc_dointvec(table, write, buffer, lenp, ppos);
-
- if (ret || !write || (last_ftrace_enabled == !!ftrace_enabled))
- goto out;
-
- if (ftrace_enabled) {
-
- /* we are starting ftrace again */
- if (rcu_dereference_protected(ftrace_ops_list,
- lockdep_is_held(&ftrace_lock)) != &ftrace_list_end)
- update_ftrace_function();
-
- ftrace_startup_sysctl();
-
- } else {
- if (is_permanent_ops_registered()) {
- ftrace_enabled = true;
- ret = -EBUSY;
- goto out;
- }
-
- /* stopping ftrace calls (just send to ftrace_stub) */
- ftrace_trace_function = ftrace_stub;
-
- ftrace_shutdown_sysctl();
- }
-
- last_ftrace_enabled = !!ftrace_enabled;
- out:
- mutex_unlock(&ftrace_lock);
- return ret;
-}
-
static int symbols_cmp(const void *a, const void *b)
{
const char **str_a = (const char **) a;
@@ -8026,3 +7933,119 @@ int ftrace_lookup_symbols(const char **sorted_syms, size_t cnt, unsigned long *a
return err;
return args.found == args.cnt ? 0 : -ESRCH;
}
+
+#ifdef CONFIG_SYSCTL
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+static void ftrace_startup_sysctl(void)
+{
+ int command;
+
+ if (unlikely(ftrace_disabled))
+ return;
+
+ /* Force update next time */
+ saved_ftrace_func = NULL;
+ /* ftrace_start_up is true if we want ftrace running */
+ if (ftrace_start_up) {
+ command = FTRACE_UPDATE_CALLS;
+ if (ftrace_graph_active)
+ command |= FTRACE_START_FUNC_RET;
+ ftrace_startup_enable(command);
+ }
+}
+
+static void ftrace_shutdown_sysctl(void)
+{
+ int command;
+
+ if (unlikely(ftrace_disabled))
+ return;
+
+ /* ftrace_start_up is true if ftrace is running */
+ if (ftrace_start_up) {
+ command = FTRACE_DISABLE_CALLS;
+ if (ftrace_graph_active)
+ command |= FTRACE_STOP_FUNC_RET;
+ ftrace_run_update_code(command);
+ }
+}
+#else
+# define ftrace_startup_sysctl() do { } while (0)
+# define ftrace_shutdown_sysctl() do { } while (0)
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
+static bool is_permanent_ops_registered(void)
+{
+ struct ftrace_ops *op;
+
+ do_for_each_ftrace_op(op, ftrace_ops_list) {
+ if (op->flags & FTRACE_OPS_FL_PERMANENT)
+ return true;
+ } while_for_each_ftrace_op(op);
+
+ return false;
+}
+
+static int
+ftrace_enable_sysctl(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ int ret = -ENODEV;
+
+ mutex_lock(&ftrace_lock);
+
+ if (unlikely(ftrace_disabled))
+ goto out;
+
+ ret = proc_dointvec(table, write, buffer, lenp, ppos);
+
+ if (ret || !write || (last_ftrace_enabled == !!ftrace_enabled))
+ goto out;
+
+ if (ftrace_enabled) {
+
+ /* we are starting ftrace again */
+ if (rcu_dereference_protected(ftrace_ops_list,
+ lockdep_is_held(&ftrace_lock)) != &ftrace_list_end)
+ update_ftrace_function();
+
+ ftrace_startup_sysctl();
+
+ } else {
+ if (is_permanent_ops_registered()) {
+ ftrace_enabled = true;
+ ret = -EBUSY;
+ goto out;
+ }
+
+ /* stopping ftrace calls (just send to ftrace_stub) */
+ ftrace_trace_function = ftrace_stub;
+
+ ftrace_shutdown_sysctl();
+ }
+
+ last_ftrace_enabled = !!ftrace_enabled;
+ out:
+ mutex_unlock(&ftrace_lock);
+ return ret;
+}
+
+static struct ctl_table ftrace_sysctls[] = {
+ {
+ .procname = "ftrace_enabled",
+ .data = &ftrace_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = ftrace_enable_sysctl,
+ },
+ {}
+};
+
+static int __init ftrace_sysctl_init(void)
+{
+ register_sysctl_init("kernel", ftrace_sysctls);
+ return 0;
+}
+late_initcall(ftrace_sysctl_init);
+#endif
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 49d7df39b02d..8a70bca67c94 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -52,9 +52,38 @@
#define CREATE_TRACE_POINTS
#include <trace/events/oom.h>
-int sysctl_panic_on_oom;
-int sysctl_oom_kill_allocating_task;
-int sysctl_oom_dump_tasks = 1;
+static int sysctl_panic_on_oom;
+static int sysctl_oom_kill_allocating_task;
+static int sysctl_oom_dump_tasks = 1;
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table vm_oom_kill_table[] = {
+ {
+ .procname = "panic_on_oom",
+ .data = &sysctl_panic_on_oom,
+ .maxlen = sizeof(sysctl_panic_on_oom),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_TWO,
+ },
+ {
+ .procname = "oom_kill_allocating_task",
+ .data = &sysctl_oom_kill_allocating_task,
+ .maxlen = sizeof(sysctl_oom_kill_allocating_task),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "oom_dump_tasks",
+ .data = &sysctl_oom_dump_tasks,
+ .maxlen = sizeof(sysctl_oom_dump_tasks),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {}
+};
+#endif
/*
* Serializes oom killer invocations (out_of_memory()) from all contexts to
@@ -703,6 +732,9 @@ static void queue_oom_reaper(struct task_struct *tsk)
static int __init oom_init(void)
{
oom_reaper_th = kthread_run(oom_reaper, NULL, "oom_reaper");
+#ifdef CONFIG_SYSCTL
+ register_sysctl_init("vm", vm_oom_kill_table);
+#endif
return 0;
}
subsys_initcall(oom_init)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 359dc1da3636..55c2776ae699 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -70,30 +70,30 @@ static long ratelimit_pages = 32;
/*
* Start background writeback (via writeback threads) at this percentage
*/
-int dirty_background_ratio = 10;
+static int dirty_background_ratio = 10;
/*
* dirty_background_bytes starts at 0 (disabled) so that it is a function of
* dirty_background_ratio * the amount of dirtyable memory
*/
-unsigned long dirty_background_bytes;
+static unsigned long dirty_background_bytes;
/*
* free highmem will not be subtracted from the total free memory
* for calculating free ratios if vm_highmem_is_dirtyable is true
*/
-int vm_highmem_is_dirtyable;
+static int vm_highmem_is_dirtyable;
/*
* The generator of dirty data starts writeback at this percentage
*/
-int vm_dirty_ratio = 20;
+static int vm_dirty_ratio = 20;
/*
* vm_dirty_bytes starts at 0 (disabled) so that it is a function of
* vm_dirty_ratio * the amount of dirtyable memory
*/
-unsigned long vm_dirty_bytes;
+static unsigned long vm_dirty_bytes;
/*
* The interval between `kupdate'-style writebacks
@@ -491,7 +491,8 @@ bool node_dirty_ok(struct pglist_data *pgdat)
return nr_pages <= limit;
}
-int dirty_background_ratio_handler(struct ctl_table *table, int write,
+#ifdef CONFIG_SYSCTL
+static int dirty_background_ratio_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret;
@@ -502,7 +503,7 @@ int dirty_background_ratio_handler(struct ctl_table *table, int write,
return ret;
}
-int dirty_background_bytes_handler(struct ctl_table *table, int write,
+static int dirty_background_bytes_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret;
@@ -513,7 +514,7 @@ int dirty_background_bytes_handler(struct ctl_table *table, int write,
return ret;
}
-int dirty_ratio_handler(struct ctl_table *table, int write, void *buffer,
+static int dirty_ratio_handler(struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
int old_ratio = vm_dirty_ratio;
@@ -527,7 +528,7 @@ int dirty_ratio_handler(struct ctl_table *table, int write, void *buffer,
return ret;
}
-int dirty_bytes_handler(struct ctl_table *table, int write,
+static int dirty_bytes_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
unsigned long old_bytes = vm_dirty_bytes;
@@ -540,6 +541,7 @@ int dirty_bytes_handler(struct ctl_table *table, int write,
}
return ret;
}
+#endif
static unsigned long wp_next_time(unsigned long cur_time)
{
@@ -1988,10 +1990,11 @@ bool wb_over_bg_thresh(struct bdi_writeback *wb)
return false;
}
+#ifdef CONFIG_SYSCTL
/*
* sysctl handler for /proc/sys/vm/dirty_writeback_centisecs
*/
-int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
+static int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
void *buffer, size_t *length, loff_t *ppos)
{
unsigned int old_interval = dirty_writeback_interval;
@@ -2012,6 +2015,7 @@ int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
return ret;
}
+#endif
void laptop_mode_timer_fn(struct timer_list *t)
{
@@ -2076,6 +2080,83 @@ static int page_writeback_cpu_online(unsigned int cpu)
return 0;
}
+#ifdef CONFIG_SYSCTL
+
+/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
+static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
+
+static struct ctl_table vm_page_writeback_sysctls[] = {
+ {
+ .procname = "dirty_background_ratio",
+ .data = &dirty_background_ratio,
+ .maxlen = sizeof(dirty_background_ratio),
+ .mode = 0644,
+ .proc_handler = dirty_background_ratio_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE_HUNDRED,
+ },
+ {
+ .procname = "dirty_background_bytes",
+ .data = &dirty_background_bytes,
+ .maxlen = sizeof(dirty_background_bytes),
+ .mode = 0644,
+ .proc_handler = dirty_background_bytes_handler,
+ .extra1 = SYSCTL_LONG_ONE,
+ },
+ {
+ .procname = "dirty_ratio",
+ .data = &vm_dirty_ratio,
+ .maxlen = sizeof(vm_dirty_ratio),
+ .mode = 0644,
+ .proc_handler = dirty_ratio_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE_HUNDRED,
+ },
+ {
+ .procname = "dirty_bytes",
+ .data = &vm_dirty_bytes,
+ .maxlen = sizeof(vm_dirty_bytes),
+ .mode = 0644,
+ .proc_handler = dirty_bytes_handler,
+ .extra1 = (void *)&dirty_bytes_min,
+ },
+ {
+ .procname = "dirty_writeback_centisecs",
+ .data = &dirty_writeback_interval,
+ .maxlen = sizeof(dirty_writeback_interval),
+ .mode = 0644,
+ .proc_handler = dirty_writeback_centisecs_handler,
+ },
+ {
+ .procname = "dirty_expire_centisecs",
+ .data = &dirty_expire_interval,
+ .maxlen = sizeof(dirty_expire_interval),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+#ifdef CONFIG_HIGHMEM
+ {
+ .procname = "highmem_is_dirtyable",
+ .data = &vm_highmem_is_dirtyable,
+ .maxlen = sizeof(vm_highmem_is_dirtyable),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+ {
+ .procname = "laptop_mode",
+ .data = &laptop_mode,
+ .maxlen = sizeof(laptop_mode),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_jiffies,
+ },
+ {}
+};
+#endif
+
/*
* Called early on to tune the page writeback dirty limits.
*
@@ -2100,6 +2181,9 @@ void __init page_writeback_init(void)
page_writeback_cpu_online, NULL);
cpuhp_setup_state(CPUHP_MM_WRITEBACK_DEAD, "mm/writeback:dead", NULL,
page_writeback_cpu_online);
+#ifdef CONFIG_SYSCTL
+ register_sysctl_init("vm", vm_page_writeback_sysctls);
+#endif
}
/**