Merge branch 'akpm' (patches from Andrew Morton)

Merge first patch-bomb from Andrew Morton:
 "Quite a lot of other stuff is banked up awaiting further
  next->mainline merging, but this batch contains:

   - Lots of random misc patches
   - OCFS2
   - Most of MM
   - backlight updates
   - lib/ updates
   - printk updates
   - checkpatch updates
   - epoll tweaking
   - rtc updates
   - hfs
   - hfsplus
   - documentation
   - procfs
   - update gcov to gcc-4.7 format
   - IPC"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (269 commits)
  ipc, msg: fix message length check for negative values
  ipc/util.c: remove unnecessary work pending test
  devpts: plug the memory leak in kill_sb
  ./Makefile: export initial ramdisk compression config option
  init/Kconfig: add option to disable kernel compression
  drivers: w1: make w1_slave::flags long to avoid memory corruption
  drivers/w1/masters/ds1wm.cuse dev_get_platdata()
  drivers/memstick/core/ms_block.c: fix unreachable state in h_msb_read_page()
  drivers/memstick/core/mspro_block.c: fix attributes array allocation
  drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr
  kernel/panic.c: reduce 1 byte usage for print tainted buffer
  gcov: reuse kbasename helper
  kernel/gcov/fs.c: use pr_warn()
  kernel/module.c: use pr_foo()
  gcov: compile specific gcov implementation based on gcc version
  gcov: add support for gcc 4.7 gcov format
  gcov: move gcov structs definitions to a gcc version specific file
  kernel/taskstats.c: return -ENOMEM when alloc memory fails in add_del_listener()
  kernel/taskstats.c: add nla_nest_cancel() for failure processing between nla_nest_start() and nla_nest_end()
  kernel/sysctl_binary.c: use scnprintf() instead of snprintf()
  ...

kernel/cpu.c

@@ -437,11 +437,6 @@ int cpu_up(unsigned int cpu)
 {
 	int err = 0;
 
-#ifdef	CONFIG_MEMORY_HOTPLUG
-	int nid;
-	pg_data_t	*pgdat;
-#endif
-
 	if (!cpu_possible(cpu)) {
 		printk(KERN_ERR "can't online cpu %d because it is not "
 			"configured as may-hotadd at boot time\n", cpu);
@@ -452,27 +447,9 @@ int cpu_up(unsigned int cpu)
 		return -EINVAL;
 	}
 
-#ifdef	CONFIG_MEMORY_HOTPLUG
-	nid = cpu_to_node(cpu);
-	if (!node_online(nid)) {
-		err = mem_online_node(nid);
-		if (err)
-			return err;
-	}
-
-	pgdat = NODE_DATA(nid);
-	if (!pgdat) {
-		printk(KERN_ERR
-			"Can't online cpu %d due to NULL pgdat\n", cpu);
-		return -ENOMEM;
-	}
-
-	if (pgdat->node_zonelists->_zonerefs->zone == NULL) {
-		mutex_lock(&zonelists_mutex);
-		build_all_zonelists(NULL, NULL);
-		mutex_unlock(&zonelists_mutex);
-	}
-#endif
+	err = try_online_node(cpu_to_node(cpu));
+	if (err)
+		return err;
 
 	cpu_maps_update_begin();
 

kernel/delayacct.c

@@ -108,12 +108,6 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk)
 	struct timespec ts;
 	cputime_t utime, stime, stimescaled, utimescaled;
 
-	/* Though tsk->delays accessed later, early exit avoids
-	 * unnecessary returning of other data
-	 */
-	if (!tsk->delays)
-		goto done;
-
 	tmp = (s64)d->cpu_run_real_total;
 	task_cputime(tsk, &utime, &stime);
 	cputime_to_timespec(utime + stime, &ts);
@@ -158,7 +152,6 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk)
 	d->freepages_count += tsk->delays->freepages_count;
 	spin_unlock_irqrestore(&tsk->delays->lock, flags);
 
-done:
 	return 0;
 }
 

kernel/events/core.c

@@ -2234,9 +2234,6 @@ static void __perf_event_sync_stat(struct perf_event *event,
 	perf_event_update_userpage(next_event);
 }
 
-#define list_next_entry(pos, member) \
-	list_entry(pos->member.next, typeof(*pos), member)
-
 static void perf_event_sync_stat(struct perf_event_context *ctx,
 				   struct perf_event_context *next_ctx)
 {

kernel/gcov/Kconfig

@@ -46,4 +46,34 @@ config GCOV_PROFILE_ALL
 	larger and run slower. Also be sure to exclude files from profiling
 	which are not linked to the kernel image to prevent linker errors.
 
+choice
+	prompt "Specify GCOV format"
+	depends on GCOV_KERNEL
+	default GCOV_FORMAT_AUTODETECT
+	---help---
+	The gcov format is usually determined by the GCC version, but there are
+	exceptions where format changes are integrated in lower-version GCCs.
+	In such a case use this option to adjust the format used in the kernel
+	accordingly.
+
+	If unsure, choose "Autodetect".
+
+config GCOV_FORMAT_AUTODETECT
+	bool "Autodetect"
+	---help---
+	Select this option to use the format that corresponds to your GCC
+	version.
+
+config GCOV_FORMAT_3_4
+	bool "GCC 3.4 format"
+	---help---
+	Select this option to use the format defined by GCC 3.4.
+
+config GCOV_FORMAT_4_7
+	bool "GCC 4.7 format"
+	---help---
+	Select this option to use the format defined by GCC 4.7.
+
+endchoice
+
 endmenu

kernel/gcov/Makefile

@@ -1,3 +1,33 @@
 ccflags-y := -DSRCTREE='"$(srctree)"' -DOBJTREE='"$(objtree)"'
 
-obj-$(CONFIG_GCOV_KERNEL) := base.o fs.o gcc_3_4.o
+# if-lt
+# Usage VAR := $(call if-lt, $(a), $(b))
+# Returns 1 if (a < b)
+if-lt = $(shell [ $(1) -lt $(2) ] && echo 1)
+
+ifeq ($(CONFIG_GCOV_FORMAT_3_4),y)
+  cc-ver := 0304
+else ifeq ($(CONFIG_GCOV_FORMAT_4_7),y)
+  cc-ver := 0407
+else
+# Use cc-version if available, otherwise set 0
+#
+# scripts/Kbuild.include, which contains cc-version function, is not included
+# during make clean "make -f scripts/Makefile.clean obj=kernel/gcov"
+# Meaning cc-ver is empty causing if-lt test to fail with
+# "/bin/sh: line 0: [: -lt: unary operator expected" error mesage.
+# This has no affect on the clean phase, but the error message could be
+# confusing/annoying. So this dummy workaround sets cc-ver to zero if cc-version
+# is not available. We can probably move if-lt to Kbuild.include, so it's also
+# not defined during clean or to include Kbuild.include in
+# scripts/Makefile.clean. But the following workaround seems least invasive.
+  cc-ver := $(if $(call cc-version),$(call cc-version),0)
+endif
+
+obj-$(CONFIG_GCOV_KERNEL) := base.o fs.o
+
+ifeq ($(call if-lt, $(cc-ver), 0407),1)
+  obj-$(CONFIG_GCOV_KERNEL) += gcc_3_4.o
+else
+  obj-$(CONFIG_GCOV_KERNEL) += gcc_4_7.o
+endif

kernel/gcov/base.c

@@ -20,7 +20,6 @@
 #include <linux/mutex.h>
 #include "gcov.h"
 
-static struct gcov_info *gcov_info_head;
 static int gcov_events_enabled;
 static DEFINE_MUTEX(gcov_lock);
 
@@ -34,7 +33,7 @@ void __gcov_init(struct gcov_info *info)
 
 	mutex_lock(&gcov_lock);
 	if (gcov_version == 0) {
-		gcov_version = info->version;
+		gcov_version = gcov_info_version(info);
 		/*
 		 * Printing gcc's version magic may prove useful for debugging
 		 * incompatibility reports.
@@ -45,8 +44,7 @@ void __gcov_init(struct gcov_info *info)
 	 * Add new profiling data structure to list and inform event
 	 * listener.
 	 */
-	info->next = gcov_info_head;
-	gcov_info_head = info;
+	gcov_info_link(info);
 	if (gcov_events_enabled)
 		gcov_event(GCOV_ADD, info);
 	mutex_unlock(&gcov_lock);
@@ -81,6 +79,12 @@ void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters)
 }
 EXPORT_SYMBOL(__gcov_merge_delta);
 
+void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
+{
+	/* Unused. */
+}
+EXPORT_SYMBOL(__gcov_merge_ior);
+
 /**
  * gcov_enable_events - enable event reporting through gcov_event()
  *
@@ -91,13 +95,15 @@ EXPORT_SYMBOL(__gcov_merge_delta);
  */
 void gcov_enable_events(void)
 {
-	struct gcov_info *info;
+	struct gcov_info *info = NULL;
 
 	mutex_lock(&gcov_lock);
 	gcov_events_enabled = 1;
+
 	/* Perform event callback for previously registered entries. */
-	for (info = gcov_info_head; info; info = info->next)
+	while ((info = gcov_info_next(info)))
 		gcov_event(GCOV_ADD, info);
+
 	mutex_unlock(&gcov_lock);
 }
 
@@ -112,25 +118,23 @@ static int gcov_module_notifier(struct notifier_block *nb, unsigned long event,
 				void *data)
 {
 	struct module *mod = data;
-	struct gcov_info *info;
-	struct gcov_info *prev;
+	struct gcov_info *info = NULL;
+	struct gcov_info *prev = NULL;
 
 	if (event != MODULE_STATE_GOING)
 		return NOTIFY_OK;
 	mutex_lock(&gcov_lock);
-	prev = NULL;
+
 	/* Remove entries located in module from linked list. */
-	for (info = gcov_info_head; info; info = info->next) {
+	while ((info = gcov_info_next(info))) {
 		if (within(info, mod->module_core, mod->core_size)) {
-			if (prev)
-				prev->next = info->next;
-			else
-				gcov_info_head = info->next;
+			gcov_info_unlink(prev, info);
 			if (gcov_events_enabled)
 				gcov_event(GCOV_REMOVE, info);
 		} else
 			prev = info;
 	}
+
 	mutex_unlock(&gcov_lock);
 
 	return NOTIFY_OK;

kernel/gcov/fs.c

@@ -75,7 +75,7 @@ static int __init gcov_persist_setup(char *str)
 	unsigned long val;
 
 	if (kstrtoul(str, 0, &val)) {
-		pr_warning("invalid gcov_persist parameter '%s'\n", str);
+		pr_warn("invalid gcov_persist parameter '%s'\n", str);
 		return 0;
 	}
 	gcov_persist = val;
@@ -242,7 +242,7 @@ static struct gcov_node *get_node_by_name(const char *name)
 
 	list_for_each_entry(node, &all_head, all) {
 		info = get_node_info(node);
-		if (info && (strcmp(info->filename, name) == 0))
+		if (info && (strcmp(gcov_info_filename(info), name) == 0))
 			return node;
 	}
 
@@ -279,7 +279,7 @@ static ssize_t gcov_seq_write(struct file *file, const char __user *addr,
 	seq = file->private_data;
 	info = gcov_iter_get_info(seq->private);
 	mutex_lock(&node_lock);
-	node = get_node_by_name(info->filename);
+	node = get_node_by_name(gcov_info_filename(info));
 	if (node) {
 		/* Reset counts or remove node for unloaded modules. */
 		if (node->num_loaded == 0)
@@ -365,7 +365,7 @@ static const char *deskew(const char *basename)
  */
 static void add_links(struct gcov_node *node, struct dentry *parent)
 {
-	char *basename;
+	const char *basename;
 	char *target;
 	int num;
 	int i;
@@ -376,14 +376,14 @@ static void add_links(struct gcov_node *node, struct dentry *parent)
 	if (!node->links)
 		return;
 	for (i = 0; i < num; i++) {
-		target = get_link_target(get_node_info(node)->filename,
-					 &gcov_link[i]);
+		target = get_link_target(
+				gcov_info_filename(get_node_info(node)),
+				&gcov_link[i]);
 		if (!target)
 			goto out_err;
-		basename = strrchr(target, '/');
-		if (!basename)
+		basename = kbasename(target);
+		if (basename == target)
 			goto out_err;
-		basename++;
 		node->links[i] = debugfs_create_symlink(deskew(basename),
 							parent,	target);
 		if (!node->links[i])
@@ -450,7 +450,7 @@ static struct gcov_node *new_node(struct gcov_node *parent,
 	} else
 		node->dentry = debugfs_create_dir(node->name, parent->dentry);
 	if (!node->dentry) {
-		pr_warning("could not create file\n");
+		pr_warn("could not create file\n");
 		kfree(node);
 		return NULL;
 	}
@@ -463,7 +463,7 @@ static struct gcov_node *new_node(struct gcov_node *parent,
 
 err_nomem:
 	kfree(node);
-	pr_warning("out of memory\n");
+	pr_warn("out of memory\n");
 	return NULL;
 }
 
@@ -576,7 +576,7 @@ static void add_node(struct gcov_info *info)
 	struct gcov_node *parent;
 	struct gcov_node *node;
 
-	filename = kstrdup(info->filename, GFP_KERNEL);
+	filename = kstrdup(gcov_info_filename(info), GFP_KERNEL);
 	if (!filename)
 		return;
 	parent = &root_node;
@@ -630,8 +630,8 @@ static void add_info(struct gcov_node *node, struct gcov_info *info)
 	 */
 	loaded_info = kcalloc(num + 1, sizeof(struct gcov_info *), GFP_KERNEL);
 	if (!loaded_info) {
-		pr_warning("could not add '%s' (out of memory)\n",
-			   info->filename);
+		pr_warn("could not add '%s' (out of memory)\n",
+			gcov_info_filename(info));
 		return;
 	}
 	memcpy(loaded_info, node->loaded_info,
@@ -644,8 +644,9 @@ static void add_info(struct gcov_node *node, struct gcov_info *info)
 		 * data set replaces the copy of the last one.
 		 */
 		if (!gcov_info_is_compatible(node->unloaded_info, info)) {
-			pr_warning("discarding saved data for %s "
-				   "(incompatible version)\n", info->filename);
+			pr_warn("discarding saved data for %s "
+				"(incompatible version)\n",
+				gcov_info_filename(info));
 			gcov_info_free(node->unloaded_info);
 			node->unloaded_info = NULL;
 		}
@@ -655,8 +656,8 @@ static void add_info(struct gcov_node *node, struct gcov_info *info)
 		 * The initial one takes precedence.
 		 */
 		if (!gcov_info_is_compatible(node->loaded_info[0], info)) {
-			pr_warning("could not add '%s' (incompatible "
-				   "version)\n", info->filename);
+			pr_warn("could not add '%s' (incompatible "
+				"version)\n", gcov_info_filename(info));
 			kfree(loaded_info);
 			return;
 		}
@@ -691,8 +692,9 @@ static void save_info(struct gcov_node *node, struct gcov_info *info)
 	else {
 		node->unloaded_info = gcov_info_dup(info);
 		if (!node->unloaded_info) {
-			pr_warning("could not save data for '%s' "
-				   "(out of memory)\n", info->filename);
+			pr_warn("could not save data for '%s' "
+				"(out of memory)\n",
+				gcov_info_filename(info));
 		}
 	}
 }
@@ -707,8 +709,8 @@ static void remove_info(struct gcov_node *node, struct gcov_info *info)
 
 	i = get_info_index(node, info);
 	if (i < 0) {
-		pr_warning("could not remove '%s' (not found)\n",
-			   info->filename);
+		pr_warn("could not remove '%s' (not found)\n",
+			gcov_info_filename(info));
 		return;
 	}
 	if (gcov_persist)
@@ -735,7 +737,7 @@ void gcov_event(enum gcov_action action, struct gcov_info *info)
 	struct gcov_node *node;
 
 	mutex_lock(&node_lock);
-	node = get_node_by_name(info->filename);
+	node = get_node_by_name(gcov_info_filename(info));
 	switch (action) {
 	case GCOV_ADD:
 		if (node)
@@ -747,8 +749,8 @@ void gcov_event(enum gcov_action action, struct gcov_info *info)
 		if (node)
 			remove_info(node, info);
 		else {
-			pr_warning("could not remove '%s' (not found)\n",
-				   info->filename);
+			pr_warn("could not remove '%s' (not found)\n",
+				gcov_info_filename(info));
 		}
 		break;
 	}

kernel/gcov/gcc_3_4.c

@@ -21,6 +21,121 @@
 #include <linux/vmalloc.h>
 #include "gcov.h"
 
+#define GCOV_COUNTERS		5
+
+static struct gcov_info *gcov_info_head;
+
+/**
+ * struct gcov_fn_info - profiling meta data per function
+ * @ident: object file-unique function identifier
+ * @checksum: function checksum
+ * @n_ctrs: number of values per counter type belonging to this function
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time.
+ */
+struct gcov_fn_info {
+	unsigned int ident;
+	unsigned int checksum;
+	unsigned int n_ctrs[0];
+};
+
+/**
+ * struct gcov_ctr_info - profiling data per counter type
+ * @num: number of counter values for this type
+ * @values: array of counter values for this type
+ * @merge: merge function for counter values of this type (unused)
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time with the exception of the values array.
+ */
+struct gcov_ctr_info {
+	unsigned int	num;
+	gcov_type	*values;
+	void		(*merge)(gcov_type *, unsigned int);
+};
+
+/**
+ * struct gcov_info - profiling data per object file
+ * @version: gcov version magic indicating the gcc version used for compilation
+ * @next: list head for a singly-linked list
+ * @stamp: time stamp
+ * @filename: name of the associated gcov data file
+ * @n_functions: number of instrumented functions
+ * @functions: function data
+ * @ctr_mask: mask specifying which counter types are active
+ * @counts: counter data per counter type
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time with the exception of the next pointer.
+ */
+struct gcov_info {
+	unsigned int			version;
+	struct gcov_info		*next;
+	unsigned int			stamp;
+	const char			*filename;
+	unsigned int			n_functions;
+	const struct gcov_fn_info	*functions;
+	unsigned int			ctr_mask;
+	struct gcov_ctr_info		counts[0];
+};
+
+/**
+ * gcov_info_filename - return info filename
+ * @info: profiling data set
+ */
+const char *gcov_info_filename(struct gcov_info *info)
+{
+	return info->filename;
+}
+
+/**
+ * gcov_info_version - return info version
+ * @info: profiling data set
+ */
+unsigned int gcov_info_version(struct gcov_info *info)
+{
+	return info->version;
+}
+
+/**
+ * gcov_info_next - return next profiling data set
+ * @info: profiling data set
+ *
+ * Returns next gcov_info following @info or first gcov_info in the chain if
+ * @info is %NULL.
+ */
+struct gcov_info *gcov_info_next(struct gcov_info *info)
+{
+	if (!info)
+		return gcov_info_head;
+
+	return info->next;
+}
+
+/**
+ * gcov_info_link - link/add profiling data set to the list
+ * @info: profiling data set
+ */
+void gcov_info_link(struct gcov_info *info)
+{
+	info->next = gcov_info_head;
+	gcov_info_head = info;
+}
+
+/**
+ * gcov_info_unlink - unlink/remove profiling data set from the list
+ * @prev: previous profiling data set
+ * @info: profiling data set
+ */
+void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
+{
+	if (prev)
+		prev->next = info->next;
+	else
+		gcov_info_head = info->next;
+}
+
 /* Symbolic links to be created for each profiling data file. */
 const struct gcov_link gcov_link[] = {
 	{ OBJ_TREE, "gcno" },	/* Link to .gcno file in $(objtree). */

kernel/gcov/gcc_4_7.c

@@ -0,0 +1,560 @@
+/*
+ *  This code provides functions to handle gcc's profiling data format
+ *  introduced with gcc 4.7.
+ *
+ *  This file is based heavily on gcc_3_4.c file.
+ *
+ *  For a better understanding, refer to gcc source:
+ *  gcc/gcov-io.h
+ *  libgcc/libgcov.c
+ *
+ *  Uses gcc-internal data definitions.
+ */
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/vmalloc.h>
+#include "gcov.h"
+
+#define GCOV_COUNTERS			8
+#define GCOV_TAG_FUNCTION_LENGTH	3
+
+static struct gcov_info *gcov_info_head;
+
+/**
+ * struct gcov_ctr_info - information about counters for a single function
+ * @num: number of counter values for this type
+ * @values: array of counter values for this type
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time with the exception of the values array.
+ */
+struct gcov_ctr_info {
+	unsigned int num;
+	gcov_type *values;
+};
+
+/**
+ * struct gcov_fn_info - profiling meta data per function
+ * @key: comdat key
+ * @ident: unique ident of function
+ * @lineno_checksum: function lineo_checksum
+ * @cfg_checksum: function cfg checksum
+ * @ctrs: instrumented counters
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time.
+ *
+ * Information about a single function.  This uses the trailing array
+ * idiom. The number of counters is determined from the merge pointer
+ * array in gcov_info.  The key is used to detect which of a set of
+ * comdat functions was selected -- it points to the gcov_info object
+ * of the object file containing the selected comdat function.
+ */
+struct gcov_fn_info {
+	const struct gcov_info *key;
+	unsigned int ident;
+	unsigned int lineno_checksum;
+	unsigned int cfg_checksum;
+	struct gcov_ctr_info ctrs[0];
+};
+
+/**
+ * struct gcov_info - profiling data per object file
+ * @version: gcov version magic indicating the gcc version used for compilation
+ * @next: list head for a singly-linked list
+ * @stamp: uniquifying time stamp
+ * @filename: name of the associated gcov data file
+ * @merge: merge functions (null for unused counter type)
+ * @n_functions: number of instrumented functions
+ * @functions: pointer to pointers to function information
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time with the exception of the next pointer.
+ */
+struct gcov_info {
+	unsigned int version;
+	struct gcov_info *next;
+	unsigned int stamp;
+	const char *filename;
+	void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int);
+	unsigned int n_functions;
+	struct gcov_fn_info **functions;
+};
+
+/**
+ * gcov_info_filename - return info filename
+ * @info: profiling data set
+ */
+const char *gcov_info_filename(struct gcov_info *info)
+{
+	return info->filename;
+}
+
+/**
+ * gcov_info_version - return info version
+ * @info: profiling data set
+ */
+unsigned int gcov_info_version(struct gcov_info *info)
+{
+	return info->version;
+}
+
+/**
+ * gcov_info_next - return next profiling data set
+ * @info: profiling data set
+ *
+ * Returns next gcov_info following @info or first gcov_info in the chain if
+ * @info is %NULL.
+ */
+struct gcov_info *gcov_info_next(struct gcov_info *info)
+{
+	if (!info)
+		return gcov_info_head;
+
+	return info->next;
+}
+
+/**
+ * gcov_info_link - link/add profiling data set to the list
+ * @info: profiling data set
+ */
+void gcov_info_link(struct gcov_info *info)
+{
+	info->next = gcov_info_head;
+	gcov_info_head = info;
+}
+
+/**
+ * gcov_info_unlink - unlink/remove profiling data set from the list
+ * @prev: previous profiling data set
+ * @info: profiling data set
+ */
+void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
+{
+	if (prev)
+		prev->next = info->next;
+	else
+		gcov_info_head = info->next;
+}
+
+/* Symbolic links to be created for each profiling data file. */
+const struct gcov_link gcov_link[] = {
+	{ OBJ_TREE, "gcno" },	/* Link to .gcno file in $(objtree). */
+	{ 0, NULL},
+};
+
+/*
+ * Determine whether a counter is active. Doesn't change at run-time.
+ */
+static int counter_active(struct gcov_info *info, unsigned int type)
+{
+	return info->merge[type] ? 1 : 0;
+}
+
+/* Determine number of active counters. Based on gcc magic. */
+static unsigned int num_counter_active(struct gcov_info *info)
+{
+	unsigned int i;
+	unsigned int result = 0;
+
+	for (i = 0; i < GCOV_COUNTERS; i++) {
+		if (counter_active(info, i))
+			result++;
+	}
+	return result;
+}
+
+/**
+ * gcov_info_reset - reset profiling data to zero
+ * @info: profiling data set
+ */
+void gcov_info_reset(struct gcov_info *info)
+{
+	struct gcov_ctr_info *ci_ptr;
+	unsigned int fi_idx;
+	unsigned int ct_idx;
+
+	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
+		ci_ptr = info->functions[fi_idx]->ctrs;
+
+		for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
+			if (!counter_active(info, ct_idx))
+				continue;
+
+			memset(ci_ptr->values, 0,
+					sizeof(gcov_type) * ci_ptr->num);
+			ci_ptr++;
+		}
+	}
+}
+
+/**
+ * gcov_info_is_compatible - check if profiling data can be added
+ * @info1: first profiling data set
+ * @info2: second profiling data set
+ *
+ * Returns non-zero if profiling data can be added, zero otherwise.
+ */
+int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2)
+{
+	return (info1->stamp == info2->stamp);
+}
+
+/**
+ * gcov_info_add - add up profiling data
+ * @dest: profiling data set to which data is added
+ * @source: profiling data set which is added
+ *
+ * Adds profiling counts of @source to @dest.
+ */
+void gcov_info_add(struct gcov_info *dst, struct gcov_info *src)
+{
+	struct gcov_ctr_info *dci_ptr;
+	struct gcov_ctr_info *sci_ptr;
+	unsigned int fi_idx;
+	unsigned int ct_idx;
+	unsigned int val_idx;
+
+	for (fi_idx = 0; fi_idx < src->n_functions; fi_idx++) {
+		dci_ptr = dst->functions[fi_idx]->ctrs;
+		sci_ptr = src->functions[fi_idx]->ctrs;
+
+		for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
+			if (!counter_active(src, ct_idx))
+				continue;
+
+			for (val_idx = 0; val_idx < sci_ptr->num; val_idx++)
+				dci_ptr->values[val_idx] +=
+					sci_ptr->values[val_idx];
+
+			dci_ptr++;
+			sci_ptr++;
+		}
+	}
+}
+
+/**
+ * gcov_info_dup - duplicate profiling data set
+ * @info: profiling data set to duplicate
+ *
+ * Return newly allocated duplicate on success, %NULL on error.
+ */
+struct gcov_info *gcov_info_dup(struct gcov_info *info)
+{
+	struct gcov_info *dup;
+	struct gcov_ctr_info *dci_ptr; /* dst counter info */
+	struct gcov_ctr_info *sci_ptr; /* src counter info */
+	unsigned int active;
+	unsigned int fi_idx; /* function info idx */
+	unsigned int ct_idx; /* counter type idx */
+	size_t fi_size; /* function info size */
+	size_t cv_size; /* counter values size */
+
+	dup = kmemdup(info, sizeof(*dup), GFP_KERNEL);
+	if (!dup)
+		return NULL;
+
+	dup->next = NULL;
+	dup->filename = NULL;
+	dup->functions = NULL;
+
+	dup->filename = kstrdup(info->filename, GFP_KERNEL);
+	if (!dup->filename)
+		goto err_free;
+
+	dup->functions = kcalloc(info->n_functions,
+				 sizeof(struct gcov_fn_info *), GFP_KERNEL);
+	if (!dup->functions)
+		goto err_free;
+
+	active = num_counter_active(info);
+	fi_size = sizeof(struct gcov_fn_info);
+	fi_size += sizeof(struct gcov_ctr_info) * active;
+
+	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
+		dup->functions[fi_idx] = kzalloc(fi_size, GFP_KERNEL);
+		if (!dup->functions[fi_idx])
+			goto err_free;
+
+		*(dup->functions[fi_idx]) = *(info->functions[fi_idx]);
+
+		sci_ptr = info->functions[fi_idx]->ctrs;
+		dci_ptr = dup->functions[fi_idx]->ctrs;
+
+		for (ct_idx = 0; ct_idx < active; ct_idx++) {
+
+			cv_size = sizeof(gcov_type) * sci_ptr->num;
+
+			dci_ptr->values = vmalloc(cv_size);
+
+			if (!dci_ptr->values)
+				goto err_free;
+
+			dci_ptr->num = sci_ptr->num;
+			memcpy(dci_ptr->values, sci_ptr->values, cv_size);
+
+			sci_ptr++;
+			dci_ptr++;
+		}
+	}
+
+	return dup;
+err_free:
+	gcov_info_free(dup);
+	return NULL;
+}
+
+/**
+ * gcov_info_free - release memory for profiling data set duplicate
+ * @info: profiling data set duplicate to free
+ */
+void gcov_info_free(struct gcov_info *info)
+{
+	unsigned int active;
+	unsigned int fi_idx;
+	unsigned int ct_idx;
+	struct gcov_ctr_info *ci_ptr;
+
+	if (!info->functions)
+		goto free_info;
+
+	active = num_counter_active(info);
+
+	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
+		if (!info->functions[fi_idx])
+			continue;
+
+		ci_ptr = info->functions[fi_idx]->ctrs;
+
+		for (ct_idx = 0; ct_idx < active; ct_idx++, ci_ptr++)
+			vfree(ci_ptr->values);
+
+		kfree(info->functions[fi_idx]);
+	}
+
+free_info:
+	kfree(info->functions);
+	kfree(info->filename);
+	kfree(info);
+}
+
+#define ITER_STRIDE	PAGE_SIZE
+
+/**
+ * struct gcov_iterator - specifies current file position in logical records
+ * @info: associated profiling data
+ * @buffer: buffer containing file data
+ * @size: size of buffer
+ * @pos: current position in file
+ */
+struct gcov_iterator {
+	struct gcov_info *info;
+	void *buffer;
+	size_t size;
+	loff_t pos;
+};
+
+/**
+ * store_gcov_u32 - store 32 bit number in gcov format to buffer
+ * @buffer: target buffer or NULL
+ * @off: offset into the buffer
+ * @v: value to be stored
+ *
+ * Number format defined by gcc: numbers are recorded in the 32 bit
+ * unsigned binary form of the endianness of the machine generating the
+ * file. Returns the number of bytes stored. If @buffer is %NULL, doesn't
+ * store anything.
+ */
+static size_t store_gcov_u32(void *buffer, size_t off, u32 v)
+{
+	u32 *data;
+
+	if (buffer) {
+		data = buffer + off;
+		*data = v;
+	}
+
+	return sizeof(*data);
+}
+
+/**
+ * store_gcov_u64 - store 64 bit number in gcov format to buffer
+ * @buffer: target buffer or NULL
+ * @off: offset into the buffer
+ * @v: value to be stored
+ *
+ * Number format defined by gcc: numbers are recorded in the 32 bit
+ * unsigned binary form of the endianness of the machine generating the
+ * file. 64 bit numbers are stored as two 32 bit numbers, the low part
+ * first. Returns the number of bytes stored. If @buffer is %NULL, doesn't store
+ * anything.
+ */
+static size_t store_gcov_u64(void *buffer, size_t off, u64 v)
+{
+	u32 *data;
+
+	if (buffer) {
+		data = buffer + off;
+
+		data[0] = (v & 0xffffffffUL);
+		data[1] = (v >> 32);
+	}
+
+	return sizeof(*data) * 2;
+}
+
+/**
+ * convert_to_gcda - convert profiling data set to gcda file format
+ * @buffer: the buffer to store file data or %NULL if no data should be stored
+ * @info: profiling data set to be converted
+ *
+ * Returns the number of bytes that were/would have been stored into the buffer.
+ */
+static size_t convert_to_gcda(char *buffer, struct gcov_info *info)
+{
+	struct gcov_fn_info *fi_ptr;
+	struct gcov_ctr_info *ci_ptr;
+	unsigned int fi_idx;
+	unsigned int ct_idx;
+	unsigned int cv_idx;
+	size_t pos = 0;
+
+	/* File header. */
+	pos += store_gcov_u32(buffer, pos, GCOV_DATA_MAGIC);
+	pos += store_gcov_u32(buffer, pos, info->version);
+	pos += store_gcov_u32(buffer, pos, info->stamp);
+
+	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
+		fi_ptr = info->functions[fi_idx];
+
+		/* Function record. */
+		pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION);
+		pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION_LENGTH);
+		pos += store_gcov_u32(buffer, pos, fi_ptr->ident);
+		pos += store_gcov_u32(buffer, pos, fi_ptr->lineno_checksum);
+		pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum);
+
+		ci_ptr = fi_ptr->ctrs;
+
+		for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
+			if (!counter_active(info, ct_idx))
+				continue;
+
+			/* Counter record. */
+			pos += store_gcov_u32(buffer, pos,
+					      GCOV_TAG_FOR_COUNTER(ct_idx));
+			pos += store_gcov_u32(buffer, pos, ci_ptr->num * 2);
+
+			for (cv_idx = 0; cv_idx < ci_ptr->num; cv_idx++) {
+				pos += store_gcov_u64(buffer, pos,
+						      ci_ptr->values[cv_idx]);
+			}
+
+			ci_ptr++;
+		}
+	}
+
+	return pos;
+}
+
+/**
+ * gcov_iter_new - allocate and initialize profiling data iterator
+ * @info: profiling data set to be iterated
+ *
+ * Return file iterator on success, %NULL otherwise.
+ */
+struct gcov_iterator *gcov_iter_new(struct gcov_info *info)
+{
+	struct gcov_iterator *iter;
+
+	iter = kzalloc(sizeof(struct gcov_iterator), GFP_KERNEL);
+	if (!iter)
+		goto err_free;
+
+	iter->info = info;
+	/* Dry-run to get the actual buffer size. */
+	iter->size = convert_to_gcda(NULL, info);
+	iter->buffer = vmalloc(iter->size);
+	if (!iter->buffer)
+		goto err_free;
+
+	convert_to_gcda(iter->buffer, info);
+
+	return iter;
+
+err_free:
+	kfree(iter);
+	return NULL;
+}
+
+
+/**
+ * gcov_iter_get_info - return profiling data set for given file iterator
+ * @iter: file iterator
+ */
+void gcov_iter_free(struct gcov_iterator *iter)
+{
+	vfree(iter->buffer);
+	kfree(iter);
+}
+
+/**
+ * gcov_iter_get_info - return profiling data set for given file iterator
+ * @iter: file iterator
+ */
+struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter)
+{
+	return iter->info;
+}
+
+/**
+ * gcov_iter_start - reset file iterator to starting position
+ * @iter: file iterator
+ */
+void gcov_iter_start(struct gcov_iterator *iter)
+{
+	iter->pos = 0;
+}
+
+/**
+ * gcov_iter_next - advance file iterator to next logical record
+ * @iter: file iterator
+ *
+ * Return zero if new position is valid, non-zero if iterator has reached end.
+ */
+int gcov_iter_next(struct gcov_iterator *iter)
+{
+	if (iter->pos < iter->size)
+		iter->pos += ITER_STRIDE;
+
+	if (iter->pos >= iter->size)
+		return -EINVAL;
+
+	return 0;
+}
+
+/**
+ * gcov_iter_write - write data for current pos to seq_file
+ * @iter: file iterator
+ * @seq: seq_file handle
+ *
+ * Return zero on success, non-zero otherwise.
+ */
+int gcov_iter_write(struct gcov_iterator *iter, struct seq_file *seq)
+{
+	size_t len;
+
+	if (iter->pos >= iter->size)
+		return -EINVAL;
+
+	len = ITER_STRIDE;
+	if (iter->pos + len > iter->size)
+		len = iter->size - iter->pos;
+
+	seq_write(seq, iter->buffer + iter->pos, len);
+
+	return 0;
+}

kernel/gcov/gcov.h

@@ -21,7 +21,6 @@
  * gcc and need to be kept as close to the original definition as possible to
  * remain compatible.
  */
-#define GCOV_COUNTERS		5
 #define GCOV_DATA_MAGIC		((unsigned int) 0x67636461)
 #define GCOV_TAG_FUNCTION	((unsigned int) 0x01000000)
 #define GCOV_TAG_COUNTER_BASE	((unsigned int) 0x01a10000)
@@ -34,60 +33,18 @@ typedef long gcov_type;
 typedef long long gcov_type;
 #endif
 
-/**
- * struct gcov_fn_info - profiling meta data per function
- * @ident: object file-unique function identifier
- * @checksum: function checksum
- * @n_ctrs: number of values per counter type belonging to this function
- *
- * This data is generated by gcc during compilation and doesn't change
- * at run-time.
- */
-struct gcov_fn_info {
-	unsigned int ident;
-	unsigned int checksum;
-	unsigned int n_ctrs[0];
-};
+/* Opaque gcov_info. The gcov structures can change as for example in gcc 4.7 so
+ * we cannot use full definition here and they need to be placed in gcc specific
+ * implementation of gcov. This also means no direct access to the members in
+ * generic code and usage of the interface below.*/
+struct gcov_info;
 
-/**
- * struct gcov_ctr_info - profiling data per counter type
- * @num: number of counter values for this type
- * @values: array of counter values for this type
- * @merge: merge function for counter values of this type (unused)
- *
- * This data is generated by gcc during compilation and doesn't change
- * at run-time with the exception of the values array.
- */
-struct gcov_ctr_info {
-	unsigned int	num;
-	gcov_type	*values;
-	void		(*merge)(gcov_type *, unsigned int);
-};
-
-/**
- * struct gcov_info - profiling data per object file
- * @version: gcov version magic indicating the gcc version used for compilation
- * @next: list head for a singly-linked list
- * @stamp: time stamp
- * @filename: name of the associated gcov data file
- * @n_functions: number of instrumented functions
- * @functions: function data
- * @ctr_mask: mask specifying which counter types are active
- * @counts: counter data per counter type
- *
- * This data is generated by gcc during compilation and doesn't change
- * at run-time with the exception of the next pointer.
- */
-struct gcov_info {
-	unsigned int			version;
-	struct gcov_info		*next;
-	unsigned int			stamp;
-	const char			*filename;
-	unsigned int			n_functions;
-	const struct gcov_fn_info	*functions;
-	unsigned int			ctr_mask;
-	struct gcov_ctr_info		counts[0];
-};
+/* Interface to access gcov_info data  */
+const char *gcov_info_filename(struct gcov_info *info);
+unsigned int gcov_info_version(struct gcov_info *info);
+struct gcov_info *gcov_info_next(struct gcov_info *info);
+void gcov_info_link(struct gcov_info *info);
+void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info);
 
 /* Base interface. */
 enum gcov_action {

kernel/kprobes.c

@@ -2066,7 +2066,7 @@ static int __init init_kprobes(void)
 {
 	int i, err = 0;
 	unsigned long offset = 0, size = 0;
-	char *modname, namebuf[128];
+	char *modname, namebuf[KSYM_NAME_LEN];
 	const char *symbol_name;
 	void *addr;
 	struct kprobe_blackpoint *kb;
@@ -2192,7 +2192,7 @@ static int __kprobes show_kprobe_addr(struct seq_file *pi, void *v)
 	const char *sym = NULL;
 	unsigned int i = *(loff_t *) v;
 	unsigned long offset = 0;
-	char *modname, namebuf[128];
+	char *modname, namebuf[KSYM_NAME_LEN];
 
 	head = &kprobe_table[i];
 	preempt_disable();

kernel/kthread.c

@@ -33,7 +33,7 @@ struct kthread_create_info
 
 	/* Result passed back to kthread_create() from kthreadd. */
 	struct task_struct *result;
-	struct completion done;
+	struct completion *done;
 
 	struct list_head list;
 };
@@ -178,6 +178,7 @@ static int kthread(void *_create)
 	struct kthread_create_info *create = _create;
 	int (*threadfn)(void *data) = create->threadfn;
 	void *data = create->data;
+	struct completion *done;
 	struct kthread self;
 	int ret;
 
@@ -187,10 +188,16 @@ static int kthread(void *_create)
 	init_completion(&self.parked);
 	current->vfork_done = &self.exited;
 
+	/* If user was SIGKILLed, I release the structure. */
+	done = xchg(&create->done, NULL);
+	if (!done) {
+		kfree(create);
+		do_exit(-EINTR);
+	}
 	/* OK, tell user we're spawned, wait for stop or wakeup */
 	__set_current_state(TASK_UNINTERRUPTIBLE);
 	create->result = current;
-	complete(&create->done);
+	complete(done);
 	schedule();
 
 	ret = -EINTR;
@@ -223,8 +230,15 @@ static void create_kthread(struct kthread_create_info *create)
 	/* We want our own signal handler (we take no signals by default). */
 	pid = kernel_thread(kthread, create, CLONE_FS | CLONE_FILES | SIGCHLD);
 	if (pid < 0) {
+		/* If user was SIGKILLed, I release the structure. */
+		struct completion *done = xchg(&create->done, NULL);
+
+		if (!done) {
+			kfree(create);
+			return;
+		}
 		create->result = ERR_PTR(pid);
-		complete(&create->done);
+		complete(done);
 	}
 }
 
@@ -255,36 +269,59 @@ struct task_struct *kthread_create_on_node(int (*threadfn)(void *data),
 					   const char namefmt[],
 					   ...)
 {
-	struct kthread_create_info create;
+	DECLARE_COMPLETION_ONSTACK(done);
+	struct task_struct *task;
+	struct kthread_create_info *create = kmalloc(sizeof(*create),
+						     GFP_KERNEL);
 
-	create.threadfn = threadfn;
-	create.data = data;
-	create.node = node;
-	init_completion(&create.done);
+	if (!create)
+		return ERR_PTR(-ENOMEM);
+	create->threadfn = threadfn;
+	create->data = data;
+	create->node = node;
+	create->done = &done;
 
 	spin_lock(&kthread_create_lock);
-	list_add_tail(&create.list, &kthread_create_list);
+	list_add_tail(&create->list, &kthread_create_list);
 	spin_unlock(&kthread_create_lock);
 
 	wake_up_process(kthreadd_task);
-	wait_for_completion(&create.done);
-
-	if (!IS_ERR(create.result)) {
+	/*
+	 * Wait for completion in killable state, for I might be chosen by
+	 * the OOM killer while kthreadd is trying to allocate memory for
+	 * new kernel thread.
+	 */
+	if (unlikely(wait_for_completion_killable(&done))) {
+		/*
+		 * If I was SIGKILLed before kthreadd (or new kernel thread)
+		 * calls complete(), leave the cleanup of this structure to
+		 * that thread.
+		 */
+		if (xchg(&create->done, NULL))
+			return ERR_PTR(-ENOMEM);
+		/*
+		 * kthreadd (or new kernel thread) will call complete()
+		 * shortly.
+		 */
+		wait_for_completion(&done);
+	}
+	task = create->result;
+	if (!IS_ERR(task)) {
 		static const struct sched_param param = { .sched_priority = 0 };
 		va_list args;
 
 		va_start(args, namefmt);
-		vsnprintf(create.result->comm, sizeof(create.result->comm),
-			  namefmt, args);
+		vsnprintf(task->comm, sizeof(task->comm), namefmt, args);
 		va_end(args);
 		/*
 		 * root may have changed our (kthreadd's) priority or CPU mask.
 		 * The kernel thread should not inherit these properties.
 		 */
-		sched_setscheduler_nocheck(create.result, SCHED_NORMAL, &param);
-		set_cpus_allowed_ptr(create.result, cpu_all_mask);
+		sched_setscheduler_nocheck(task, SCHED_NORMAL, &param);
+		set_cpus_allowed_ptr(task, cpu_all_mask);
 	}
-	return create.result;
+	kfree(create);
+	return task;
 }
 EXPORT_SYMBOL(kthread_create_on_node);
 

kernel/module.c

@@ -378,23 +378,21 @@ static bool check_symbol(const struct symsearch *syms,
 		if (syms->licence == GPL_ONLY)
 			return false;
 		if (syms->licence == WILL_BE_GPL_ONLY && fsa->warn) {
-			printk(KERN_WARNING "Symbol %s is being used "
-			       "by a non-GPL module, which will not "
-			       "be allowed in the future\n", fsa->name);
+			pr_warn("Symbol %s is being used by a non-GPL module, "
+				"which will not be allowed in the future\n",
+				fsa->name);
 		}
 	}
 
 #ifdef CONFIG_UNUSED_SYMBOLS
 	if (syms->unused && fsa->warn) {
-		printk(KERN_WARNING "Symbol %s is marked as UNUSED, "
-		       "however this module is using it.\n", fsa->name);
-		printk(KERN_WARNING
-		       "This symbol will go away in the future.\n");
-		printk(KERN_WARNING
-		       "Please evalute if this is the right api to use and if "
-		       "it really is, submit a report the linux kernel "
-		       "mailinglist together with submitting your code for "
-		       "inclusion.\n");
+		pr_warn("Symbol %s is marked as UNUSED, however this module is "
+			"using it.\n", fsa->name);
+		pr_warn("This symbol will go away in the future.\n");
+		pr_warn("Please evalute if this is the right api to use and if "
+			"it really is, submit a report the linux kernel "
+			"mailinglist together with submitting your code for "
+			"inclusion.\n");
 	}
 #endif
 
@@ -492,16 +490,15 @@ static int percpu_modalloc(struct module *mod, struct load_info *info)
 		return 0;
 
 	if (align > PAGE_SIZE) {
-		printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n",
-		       mod->name, align, PAGE_SIZE);
+		pr_warn("%s: per-cpu alignment %li > %li\n",
+			mod->name, align, PAGE_SIZE);
 		align = PAGE_SIZE;
 	}
 
 	mod->percpu = __alloc_reserved_percpu(pcpusec->sh_size, align);
 	if (!mod->percpu) {
-		printk(KERN_WARNING
-		       "%s: Could not allocate %lu bytes percpu data\n",
-		       mod->name, (unsigned long)pcpusec->sh_size);
+		pr_warn("%s: Could not allocate %lu bytes percpu data\n",
+			mod->name, (unsigned long)pcpusec->sh_size);
 		return -ENOMEM;
 	}
 	mod->percpu_size = pcpusec->sh_size;
@@ -679,7 +676,7 @@ static int add_module_usage(struct module *a, struct module *b)
 	pr_debug("Allocating new usage for %s.\n", a->name);
 	use = kmalloc(sizeof(*use), GFP_ATOMIC);
 	if (!use) {
-		printk(KERN_WARNING "%s: out of memory loading\n", a->name);
+		pr_warn("%s: out of memory loading\n", a->name);
 		return -ENOMEM;
 	}
 
@@ -1145,8 +1142,7 @@ static int try_to_force_load(struct module *mod, const char *reason)
 {
 #ifdef CONFIG_MODULE_FORCE_LOAD
 	if (!test_taint(TAINT_FORCED_MODULE))
-		printk(KERN_WARNING "%s: %s: kernel tainted.\n",
-		       mod->name, reason);
+		pr_warn("%s: %s: kernel tainted.\n", mod->name, reason);
 	add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_NOW_UNRELIABLE);
 	return 0;
 #else
@@ -1199,8 +1195,7 @@ static int check_version(Elf_Shdr *sechdrs,
 		goto bad_version;
 	}
 
-	printk(KERN_WARNING "%s: no symbol version for %s\n",
-	       mod->name, symname);
+	pr_warn("%s: no symbol version for %s\n", mod->name, symname);
 	return 0;
 
 bad_version:
@@ -1309,8 +1304,8 @@ resolve_symbol_wait(struct module *mod,
 			!IS_ERR(ksym = resolve_symbol(mod, info, name, owner))
 			|| PTR_ERR(ksym) != -EBUSY,
 					     30 * HZ) <= 0) {
-		printk(KERN_WARNING "%s: gave up waiting for init of module %s.\n",
-		       mod->name, owner);
+		pr_warn("%s: gave up waiting for init of module %s.\n",
+			mod->name, owner);
 	}
 	return ksym;
 }
@@ -1626,15 +1621,14 @@ static int mod_sysfs_init(struct module *mod)
 	struct kobject *kobj;
 
 	if (!module_sysfs_initialized) {
-		printk(KERN_ERR "%s: module sysfs not initialized\n",
-		       mod->name);
+		pr_err("%s: module sysfs not initialized\n", mod->name);
 		err = -EINVAL;
 		goto out;
 	}
 
 	kobj = kset_find_obj(module_kset, mod->name);
 	if (kobj) {
-		printk(KERN_ERR "%s: module is already loaded\n", mod->name);
+		pr_err("%s: module is already loaded\n", mod->name);
 		kobject_put(kobj);
 		err = -EINVAL;
 		goto out;
@@ -1961,8 +1955,7 @@ static int verify_export_symbols(struct module *mod)
 	for (i = 0; i < ARRAY_SIZE(arr); i++) {
 		for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) {
 			if (find_symbol(s->name, &owner, NULL, true, false)) {
-				printk(KERN_ERR
-				       "%s: exports duplicate symbol %s"
+				pr_err("%s: exports duplicate symbol %s"
 				       " (owned by %s)\n",
 				       mod->name, s->name, module_name(owner));
 				return -ENOEXEC;
@@ -2013,8 +2006,8 @@ static int simplify_symbols(struct module *mod, const struct load_info *info)
 			if (!ksym && ELF_ST_BIND(sym[i].st_info) == STB_WEAK)
 				break;
 
-			printk(KERN_WARNING "%s: Unknown symbol %s (err %li)\n",
-			       mod->name, name, PTR_ERR(ksym));
+			pr_warn("%s: Unknown symbol %s (err %li)\n",
+				mod->name, name, PTR_ERR(ksym));
 			ret = PTR_ERR(ksym) ?: -ENOENT;
 			break;
 
@@ -2168,8 +2161,8 @@ static void set_license(struct module *mod, const char *license)
 
 	if (!license_is_gpl_compatible(license)) {
 		if (!test_taint(TAINT_PROPRIETARY_MODULE))
-			printk(KERN_WARNING "%s: module license '%s' taints "
-				"kernel.\n", mod->name, license);
+			pr_warn("%s: module license '%s' taints kernel.\n",
+				mod->name, license);
 		add_taint_module(mod, TAINT_PROPRIETARY_MODULE,
 				 LOCKDEP_NOW_UNRELIABLE);
 	}
@@ -2405,8 +2398,8 @@ static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num)
 		return;
 #ifdef CONFIG_DYNAMIC_DEBUG
 	if (ddebug_add_module(debug, num, debug->modname))
-		printk(KERN_ERR "dynamic debug error adding module: %s\n",
-					debug->modname);
+		pr_err("dynamic debug error adding module: %s\n",
+			debug->modname);
 #endif
 }
 
@@ -2619,8 +2612,7 @@ static int rewrite_section_headers(struct load_info *info, int flags)
 		Elf_Shdr *shdr = &info->sechdrs[i];
 		if (shdr->sh_type != SHT_NOBITS
 		    && info->len < shdr->sh_offset + shdr->sh_size) {
-			printk(KERN_ERR "Module len %lu truncated\n",
-			       info->len);
+			pr_err("Module len %lu truncated\n", info->len);
 			return -ENOEXEC;
 		}
 
@@ -2682,15 +2674,14 @@ static struct module *setup_load_info(struct load_info *info, int flags)
 
 	info->index.mod = find_sec(info, ".gnu.linkonce.this_module");
 	if (!info->index.mod) {
-		printk(KERN_WARNING "No module found in object\n");
+		pr_warn("No module found in object\n");
 		return ERR_PTR(-ENOEXEC);
 	}
 	/* This is temporary: point mod into copy of data. */
 	mod = (void *)info->sechdrs[info->index.mod].sh_addr;
 
 	if (info->index.sym == 0) {
-		printk(KERN_WARNING "%s: module has no symbols (stripped?)\n",
-		       mod->name);
+		pr_warn("%s: module has no symbols (stripped?)\n", mod->name);
 		return ERR_PTR(-ENOEXEC);
 	}
 
@@ -2717,7 +2708,7 @@ static int check_modinfo(struct module *mod, struct load_info *info, int flags)
 		if (err)
 			return err;
 	} else if (!same_magic(modmagic, vermagic, info->index.vers)) {
-		printk(KERN_ERR "%s: version magic '%s' should be '%s'\n",
+		pr_err("%s: version magic '%s' should be '%s'\n",
 		       mod->name, modmagic, vermagic);
 		return -ENOEXEC;
 	}
@@ -2727,9 +2718,8 @@ static int check_modinfo(struct module *mod, struct load_info *info, int flags)
 
 	if (get_modinfo(info, "staging")) {
 		add_taint_module(mod, TAINT_CRAP, LOCKDEP_STILL_OK);
-		printk(KERN_WARNING "%s: module is from the staging directory,"
-		       " the quality is unknown, you have been warned.\n",
-		       mod->name);
+		pr_warn("%s: module is from the staging directory, the quality "
+			"is unknown, you have been warned.\n", mod->name);
 	}
 
 	/* Set up license info based on the info section */
@@ -2801,8 +2791,7 @@ static void find_module_sections(struct module *mod, struct load_info *info)
 				    sizeof(*mod->extable), &mod->num_exentries);
 
 	if (section_addr(info, "__obsparm"))
-		printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
-		       mod->name);
+		pr_warn("%s: Ignoring obsolete parameters\n", mod->name);
 
 	info->debug = section_objs(info, "__verbose",
 				   sizeof(*info->debug), &info->num_debug);
@@ -3078,11 +3067,10 @@ static int do_init_module(struct module *mod)
 		return ret;
 	}
 	if (ret > 0) {
-		printk(KERN_WARNING
-"%s: '%s'->init suspiciously returned %d, it should follow 0/-E convention\n"
-"%s: loading module anyway...\n",
-		       __func__, mod->name, ret,
-		       __func__);
+		pr_warn("%s: '%s'->init suspiciously returned %d, it should "
+			"follow 0/-E convention\n"
+			"%s: loading module anyway...\n",
+			__func__, mod->name, ret, __func__);
 		dump_stack();
 	}
 
@@ -3205,10 +3193,8 @@ static int unknown_module_param_cb(char *param, char *val, const char *modname)
 {
 	/* Check for magic 'dyndbg' arg */ 
 	int ret = ddebug_dyndbg_module_param_cb(param, val, modname);
-	if (ret != 0) {
-		printk(KERN_WARNING "%s: unknown parameter '%s' ignored\n",
-		       modname, param);
-	}
+	if (ret != 0)
+		pr_warn("%s: unknown parameter '%s' ignored\n", modname, param);
 	return 0;
 }
 
@@ -3243,10 +3229,9 @@ static int load_module(struct load_info *info, const char __user *uargs,
 #ifdef CONFIG_MODULE_SIG
 	mod->sig_ok = info->sig_ok;
 	if (!mod->sig_ok) {
-		printk_once(KERN_NOTICE
-			    "%s: module verification failed: signature and/or"
-			    " required key missing - tainting kernel\n",
-			    mod->name);
+		pr_notice_once("%s: module verification failed: signature "
+			       "and/or  required key missing - tainting "
+			       "kernel\n", mod->name);
 		add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_STILL_OK);
 	}
 #endif

kernel/panic.c

@@ -233,7 +233,7 @@ static const struct tnt tnts[] = {
  */
 const char *print_tainted(void)
 {
-	static char buf[ARRAY_SIZE(tnts) + sizeof("Tainted: ") + 1];
+	static char buf[ARRAY_SIZE(tnts) + sizeof("Tainted: ")];
 
 	if (tainted_mask) {
 		char *s;

kernel/printk/printk.c

@@ -705,9 +705,9 @@ const struct file_operations kmsg_fops = {
 
 #ifdef CONFIG_KEXEC
 /*
- * This appends the listed symbols to /proc/vmcoreinfo
+ * This appends the listed symbols to /proc/vmcore
  *
- * /proc/vmcoreinfo is used by various utiilties, like crash and makedumpfile to
+ * /proc/vmcore is used by various utilities, like crash and makedumpfile to
  * obtain access to symbols that are otherwise very difficult to locate.  These
  * symbols are specifically used so that utilities can access and extract the
  * dmesg log from a vmcore file after a crash.
@@ -791,7 +791,7 @@ static bool __read_mostly ignore_loglevel;
 static int __init ignore_loglevel_setup(char *str)
 {
 	ignore_loglevel = 1;
-	printk(KERN_INFO "debug: ignoring loglevel setting.\n");
+	pr_info("debug: ignoring loglevel setting.\n");
 
 	return 0;
 }
@@ -820,9 +820,9 @@ static int __init boot_delay_setup(char *str)
 	pr_debug("boot_delay: %u, preset_lpj: %ld, lpj: %lu, "
 		"HZ: %d, loops_per_msec: %llu\n",
 		boot_delay, preset_lpj, lpj, HZ, loops_per_msec);
-	return 1;
+	return 0;
 }
-__setup("boot_delay=", boot_delay_setup);
+early_param("boot_delay", boot_delay_setup);
 
 static void boot_delay_msec(int level)
 {
@@ -2193,7 +2193,7 @@ static int __read_mostly keep_bootcon;
 static int __init keep_bootcon_setup(char *str)
 {
 	keep_bootcon = 1;
-	printk(KERN_INFO "debug: skip boot console de-registration.\n");
+	pr_info("debug: skip boot console de-registration.\n");
 
 	return 0;
 }
@@ -2241,7 +2241,7 @@ void register_console(struct console *newcon)
 		/* find the last or real console */
 		for_each_console(bcon) {
 			if (!(bcon->flags & CON_BOOT)) {
-				printk(KERN_INFO "Too late to register bootconsole %s%d\n",
+				pr_info("Too late to register bootconsole %s%d\n",
 					newcon->name, newcon->index);
 				return;
 			}
@@ -2358,21 +2358,18 @@ void register_console(struct console *newcon)
 	 * users know there might be something in the kernel's log buffer that
 	 * went to the bootconsole (that they do not see on the real console)
 	 */
+	pr_info("%sconsole [%s%d] enabled\n",
+		(newcon->flags & CON_BOOT) ? "boot" : "" ,
+		newcon->name, newcon->index);
 	if (bcon &&
 	    ((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV) &&
 	    !keep_bootcon) {
-		/* we need to iterate through twice, to make sure we print
-		 * everything out, before we unregister the console(s)
+		/* We need to iterate through all boot consoles, to make
+		 * sure we print everything out, before we unregister them.
 		 */
-		printk(KERN_INFO "console [%s%d] enabled, bootconsole disabled\n",
-			newcon->name, newcon->index);
 		for_each_console(bcon)
 			if (bcon->flags & CON_BOOT)
 				unregister_console(bcon);
-	} else {
-		printk(KERN_INFO "%sconsole [%s%d] enabled\n",
-			(newcon->flags & CON_BOOT) ? "boot" : "" ,
-			newcon->name, newcon->index);
 	}
 }
 EXPORT_SYMBOL(register_console);
@@ -2382,6 +2379,10 @@ int unregister_console(struct console *console)
         struct console *a, *b;
 	int res;
 
+	pr_info("%sconsole [%s%d] disabled\n",
+		(console->flags & CON_BOOT) ? "boot" : "" ,
+		console->name, console->index);
+
 	res = _braille_unregister_console(console);
 	if (res)
 		return res;
@@ -2421,8 +2422,6 @@ static int __init printk_late_init(void)
 
 	for_each_console(con) {
 		if (!keep_bootcon && con->flags & CON_BOOT) {
-			printk(KERN_INFO "turn off boot console %s%d\n",
-				con->name, con->index);
 			unregister_console(con);
 		}
 	}
@@ -2449,7 +2448,7 @@ static void wake_up_klogd_work_func(struct irq_work *irq_work)
 
 	if (pending & PRINTK_PENDING_SCHED) {
 		char *buf = __get_cpu_var(printk_sched_buf);
-		printk(KERN_WARNING "[sched_delayed] %s", buf);
+		pr_warn("[sched_delayed] %s", buf);
 	}
 
 	if (pending & PRINTK_PENDING_WAKEUP)

kernel/ptrace.c

@@ -257,7 +257,8 @@ ok:
 	if (task->mm)
 		dumpable = get_dumpable(task->mm);
 	rcu_read_lock();
-	if (!dumpable && !ptrace_has_cap(__task_cred(task)->user_ns, mode)) {
+	if (dumpable != SUID_DUMP_USER &&
+	    !ptrace_has_cap(__task_cred(task)->user_ns, mode)) {
 		rcu_read_unlock();
 		return -EPERM;
 	}

kernel/sys.c

@@ -16,7 +16,6 @@
 #include <linux/perf_event.h>
 #include <linux/resource.h>
 #include <linux/kernel.h>
-#include <linux/kexec.h>
 #include <linux/workqueue.h>
 #include <linux/capability.h>
 #include <linux/device.h>

kernel/sysctl.c

@@ -2222,8 +2222,11 @@ static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int
 			*i = val;
 		} else {
 			val = convdiv * (*i) / convmul;
-			if (!first)
+			if (!first) {
 				err = proc_put_char(&buffer, &left, '\t');
+				if (err)
+					break;
+			}
 			err = proc_put_long(&buffer, &left, val, false);
 			if (err)
 				break;

kernel/sysctl_binary.c

@@ -1024,7 +1024,7 @@ static ssize_t bin_intvec(struct file *file,
 			if (get_user(value, vec + i))
 				goto out_kfree;
 
-			str += snprintf(str, end - str, "%lu\t", value);
+			str += scnprintf(str, end - str, "%lu\t", value);
 		}
 
 		result = kernel_write(file, buffer, str - buffer, 0);
@@ -1095,7 +1095,7 @@ static ssize_t bin_ulongvec(struct file *file,
 			if (get_user(value, vec + i))
 				goto out_kfree;
 
-			str += snprintf(str, end - str, "%lu\t", value);
+			str += scnprintf(str, end - str, "%lu\t", value);
 		}
 
 		result = kernel_write(file, buffer, str - buffer, 0);
@@ -1205,7 +1205,7 @@ static ssize_t bin_dn_node_address(struct file *file,
 		if (get_user(dnaddr, (__le16 __user *)newval))
 			goto out;
 
-		len = snprintf(buf, sizeof(buf), "%hu.%hu",
+		len = scnprintf(buf, sizeof(buf), "%hu.%hu",
 				le16_to_cpu(dnaddr) >> 10,
 				le16_to_cpu(dnaddr) & 0x3ff);
 

kernel/taskstats.c

@@ -290,6 +290,7 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
 	struct listener_list *listeners;
 	struct listener *s, *tmp, *s2;
 	unsigned int cpu;
+	int ret = 0;
 
 	if (!cpumask_subset(mask, cpu_possible_mask))
 		return -EINVAL;
@@ -304,9 +305,10 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
 		for_each_cpu(cpu, mask) {
 			s = kmalloc_node(sizeof(struct listener),
 					GFP_KERNEL, cpu_to_node(cpu));
-			if (!s)
+			if (!s) {
+				ret = -ENOMEM;
 				goto cleanup;
-
+			}
 			s->pid = pid;
 			s->valid = 1;
 
@@ -339,7 +341,7 @@ cleanup:
 		}
 		up_write(&listeners->sem);
 	}
-	return 0;
+	return ret;
 }
 
 static int parse(struct nlattr *na, struct cpumask *mask)
@@ -404,11 +406,15 @@ static struct taskstats *mk_reply(struct sk_buff *skb, int type, u32 pid)
 	if (!na)
 		goto err;
 
-	if (nla_put(skb, type, sizeof(pid), &pid) < 0)
+	if (nla_put(skb, type, sizeof(pid), &pid) < 0) {
+		nla_nest_cancel(skb, na);
 		goto err;
+	}
 	ret = nla_reserve(skb, TASKSTATS_TYPE_STATS, sizeof(struct taskstats));
-	if (!ret)
+	if (!ret) {
+		nla_nest_cancel(skb, na);
 		goto err;
+	}
 	nla_nest_end(skb, na);
 
 	return nla_data(ret);