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s390 updates for 5.3-rc2

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- Add ABI to kernel image file which allows e.g. the file utility to figure
    out the kernel version.
 
  - Wire up clone3 system call.
 
  - Add support for kasan bitops instrumentation.
 
  - uapi header cleanup: use __u{16,32,64} instead of uint{16,32,64}_t.
 
  - Provide proper ARCH_ZONE_DMA_BITS so the s390 DMA zone is correctly defined
    with 2 GB instead of the default value of 1 MB.
 
  - Farhan Ali leaves the group of vfio-ccw maintainers.
 
  - Various small vfio-ccw fixes.
 
  - Add missing locking for airq_areas array in virtio code.
 
  - Minor qdio improvements.
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Merge tag 's390-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:

 - Add ABI to kernel image file which allows e.g. the file utility to
   figure out the kernel version.

 - Wire up clone3 system call.

 - Add support for kasan bitops instrumentation.

 - uapi header cleanup: use __u{16,32,64} instead of uint{16,32,64}_t.

 - Provide proper ARCH_ZONE_DMA_BITS so the s390 DMA zone is correctly
   defined with 2 GB instead of the default value of 1 MB.

 - Farhan Ali leaves the group of vfio-ccw maintainers.

 - Various small vfio-ccw fixes.

 - Add missing locking for airq_areas array in virtio code.

 - Minor qdio improvements.

* tag 's390-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  MAINTAINERS: vfio-ccw: Remove myself as the maintainer
  s390/mm: use shared variables for sysctl range check
  virtio/s390: fix race on airq_areas[]
  s390/dma: provide proper ARCH_ZONE_DMA_BITS value
  s390/kasan: add bitops instrumentation
  s390/bitops: make test functions return bool
  s390: wire up clone3 system call
  kbuild: enable arch/s390/include/uapi/asm/zcrypt.h for uapi header test
  s390: use __u{16,32,64} instead of uint{16,32,64}_t in uapi header
  s390/hypfs: fix a typo in the name of a function
  s390/qdio: restrict QAOB usage to IQD unicast queues
  s390/qdio: add sanity checks to the fast-requeue path
  s390: enable detection of kernel version from bzImage
  Documentation: fix vfio-ccw doc
  vfio-ccw: Update documentation for csch/hsch
  vfio-ccw: Don't call cp_free if we are processing a channel program
  vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn
  vfio-ccw: Fix memory leak and don't call cp_free in cp_init
  vfio-ccw: Fix misleading comment when setting orb.cmd.c64
This commit is contained in:
Linus Torvalds 2019-07-27 08:58:04 -07:00
commit 43e317c1bb
19 changed files with 140 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
Documentation/s390/vfio-ccw.rst
View File

@ -180,6 +180,13 @@ The process of how these work together.
add it to an iommu_group and a vfio_group. Then we could pass through
the mdev to a guest.
VFIO-CCW Regions
----------------
The vfio-ccw driver exposes MMIO regions to accept requests from and return
results to userspace.
vfio-ccw I/O region
-------------------
@ -205,6 +212,25 @@ irb_area stores the I/O result.
ret_code stores a return code for each access of the region.
This region is always available.
vfio-ccw cmd region
-------------------
The vfio-ccw cmd region is used to accept asynchronous instructions
from userspace::
#define VFIO_CCW_ASYNC_CMD_HSCH (1 << 0)
#define VFIO_CCW_ASYNC_CMD_CSCH (1 << 1)
struct ccw_cmd_region {
__u32 command;
__u32 ret_code;
} __packed;
This region is exposed via region type VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD.
Currently, CLEAR SUBCHANNEL and HALT SUBCHANNEL use this region.
vfio-ccw operation details
--------------------------
@ -306,9 +332,8 @@ Together with the corresponding work in QEMU, we can bring the passed
through DASD/ECKD device online in a guest now and use it as a block
device.
While the current code allows the guest to start channel programs via
START SUBCHANNEL, support for HALT SUBCHANNEL or CLEAR SUBCHANNEL is
not yet implemented.
The current code allows the guest to start channel programs via
START SUBCHANNEL, and to issue HALT SUBCHANNEL and CLEAR SUBCHANNEL.
vfio-ccw supports classic (command mode) channel I/O only. Transport
mode (HPF) is not supported.

1
MAINTAINERS
View File

@ -13948,7 +13948,6 @@ F: drivers/pci/hotplug/s390_pci_hpc.c
S390 VFIO-CCW DRIVER
M: Cornelia Huck <cohuck@redhat.com>
M: Farhan Ali <alifm@linux.ibm.com>
M: Eric Farman <farman@linux.ibm.com>
R: Halil Pasic <pasic@linux.ibm.com>
L: linux-s390@vger.kernel.org

2
arch/s390/boot/Makefile
View File

@ -36,7 +36,7 @@ CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
obj-y := head.o als.o startup.o mem_detect.o ipl_parm.o ipl_report.o
obj-y += string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
obj-y += ctype.o text_dma.o
obj-y += version.o ctype.o text_dma.o
obj-$(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) += uv.o
obj-$(CONFIG_RELOCATABLE) += machine_kexec_reloc.o
obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o

1
arch/s390/boot/boot.h
View File

@ -12,6 +12,7 @@ void print_missing_facilities(void);
unsigned long get_random_base(unsigned long safe_addr);
extern int kaslr_enabled;
extern const char kernel_version[];
unsigned long read_ipl_report(unsigned long safe_offset);

1
arch/s390/boot/head.S
View File

@ -361,6 +361,7 @@ ENTRY(startup_kdump)
.quad 0 # INITRD_SIZE
.quad 0 # OLDMEM_BASE
.quad 0 # OLDMEM_SIZE
.quad kernel_version # points to kernel version string
.org COMMAND_LINE
.byte "root=/dev/ram0 ro"

7
arch/s390/boot/version.c Normal file
View File

@ -0,0 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <generated/utsrelease.h>
#include <generated/compile.h>
#include "boot.h"
const char kernel_version[] = UTS_RELEASE
" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ") " UTS_VERSION;

4
arch/s390/hypfs/hypfs_vm.c
View File

@ -118,7 +118,7 @@ do { \
return PTR_ERR(rc); \
} while(0)
static int hpyfs_vm_create_guest(struct dentry *systems_dir,
static int hypfs_vm_create_guest(struct dentry *systems_dir,
struct diag2fc_data *data)
{
char guest_name[NAME_LEN + 1] = {};
@ -219,7 +219,7 @@ int hypfs_vm_create_files(struct dentry *root)
}
for (i = 0; i < count; i++) {
rc = hpyfs_vm_create_guest(dir, &(data[i]));
rc = hypfs_vm_create_guest(dir, &(data[i]));
if (rc)
goto failed;
}

73
arch/s390/include/asm/bitops.h
View File

@ -35,6 +35,7 @@
#include <linux/typecheck.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/atomic_ops.h>
#include <asm/barrier.h>
@ -55,7 +56,7 @@ __bitops_byte(unsigned long nr, volatile unsigned long *ptr)
return ((unsigned char *)ptr) + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
}
static inline void set_bit(unsigned long nr, volatile unsigned long *ptr)
static inline void arch_set_bit(unsigned long nr, volatile unsigned long *ptr)
{
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long mask;
@ -76,7 +77,7 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *ptr)
__atomic64_or(mask, (long *)addr);
}
static inline void clear_bit(unsigned long nr, volatile unsigned long *ptr)
static inline void arch_clear_bit(unsigned long nr, volatile unsigned long *ptr)
{
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long mask;
@ -97,7 +98,8 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *ptr)
__atomic64_and(mask, (long *)addr);
}
static inline void change_bit(unsigned long nr, volatile unsigned long *ptr)
static inline void arch_change_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long mask;
@ -118,8 +120,8 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *ptr)
__atomic64_xor(mask, (long *)addr);
}
static inline int
test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
static inline bool arch_test_and_set_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long old, mask;
@ -129,8 +131,8 @@ test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
return (old & mask) != 0;
}
static inline int
test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
static inline bool arch_test_and_clear_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long old, mask;
@ -140,8 +142,8 @@ test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
return (old & ~mask) != 0;
}
static inline int
test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
static inline bool arch_test_and_change_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long old, mask;
@ -151,30 +153,31 @@ test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
return (old & mask) != 0;
}
static inline void __set_bit(unsigned long nr, volatile unsigned long *ptr)
static inline void arch___set_bit(unsigned long nr, volatile unsigned long *ptr)
{
unsigned char *addr = __bitops_byte(nr, ptr);
*addr |= 1 << (nr & 7);
}
static inline void
__clear_bit(unsigned long nr, volatile unsigned long *ptr)
static inline void arch___clear_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned char *addr = __bitops_byte(nr, ptr);
*addr &= ~(1 << (nr & 7));
}
static inline void __change_bit(unsigned long nr, volatile unsigned long *ptr)
static inline void arch___change_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned char *addr = __bitops_byte(nr, ptr);
*addr ^= 1 << (nr & 7);
}
static inline int
__test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
static inline bool arch___test_and_set_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned char *addr = __bitops_byte(nr, ptr);
unsigned char ch;
@ -184,8 +187,8 @@ __test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
return (ch >> (nr & 7)) & 1;
}
static inline int
__test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
static inline bool arch___test_and_clear_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned char *addr = __bitops_byte(nr, ptr);
unsigned char ch;
@ -195,8 +198,8 @@ __test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
return (ch >> (nr & 7)) & 1;
}
static inline int
__test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
static inline bool arch___test_and_change_bit(unsigned long nr,
volatile unsigned long *ptr)
{
unsigned char *addr = __bitops_byte(nr, ptr);
unsigned char ch;
@ -206,7 +209,8 @@ __test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
return (ch >> (nr & 7)) & 1;
}
static inline int test_bit(unsigned long nr, const volatile unsigned long *ptr)
static inline bool arch_test_bit(unsigned long nr,
const volatile unsigned long *ptr)
{
const volatile unsigned char *addr;
@ -215,28 +219,30 @@ static inline int test_bit(unsigned long nr, const volatile unsigned long *ptr)
return (*addr >> (nr & 7)) & 1;
}
static inline int test_and_set_bit_lock(unsigned long nr,
volatile unsigned long *ptr)
static inline bool arch_test_and_set_bit_lock(unsigned long nr,
volatile unsigned long *ptr)
{
if (test_bit(nr, ptr))
if (arch_test_bit(nr, ptr))
return 1;
return test_and_set_bit(nr, ptr);
return arch_test_and_set_bit(nr, ptr);
}
static inline void clear_bit_unlock(unsigned long nr,
volatile unsigned long *ptr)
static inline void arch_clear_bit_unlock(unsigned long nr,
volatile unsigned long *ptr)
{
smp_mb__before_atomic();
clear_bit(nr, ptr);
arch_clear_bit(nr, ptr);
}
static inline void __clear_bit_unlock(unsigned long nr,
volatile unsigned long *ptr)
static inline void arch___clear_bit_unlock(unsigned long nr,
volatile unsigned long *ptr)
{
smp_mb();
__clear_bit(nr, ptr);
arch___clear_bit(nr, ptr);
}
#include <asm-generic/bitops-instrumented.h>
/*
* Functions which use MSB0 bit numbering.
* The bits are numbered:
@ -261,7 +267,8 @@ static inline void clear_bit_inv(unsigned long nr, volatile unsigned long *ptr)
return clear_bit(nr ^ (BITS_PER_LONG - 1), ptr);
}
static inline int test_and_clear_bit_inv(unsigned long nr, volatile unsigned long *ptr)
static inline bool test_and_clear_bit_inv(unsigned long nr,
volatile unsigned long *ptr)
{
return test_and_clear_bit(nr ^ (BITS_PER_LONG - 1), ptr);
}
@ -276,8 +283,8 @@ static inline void __clear_bit_inv(unsigned long nr, volatile unsigned long *ptr
return __clear_bit(nr ^ (BITS_PER_LONG - 1), ptr);
}
static inline int test_bit_inv(unsigned long nr,
const volatile unsigned long *ptr)
static inline bool test_bit_inv(unsigned long nr,
const volatile unsigned long *ptr)
{
return test_bit(nr ^ (BITS_PER_LONG - 1), ptr);
}

2
arch/s390/include/asm/page.h
View File

@ -177,6 +177,8 @@ static inline int devmem_is_allowed(unsigned long pfn)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#define ARCH_ZONE_DMA_BITS 31
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>

4
arch/s390/include/asm/setup.h
View File

@ -54,6 +54,7 @@
#define INITRD_SIZE_OFFSET 0x10410
#define OLDMEM_BASE_OFFSET 0x10418
#define OLDMEM_SIZE_OFFSET 0x10420
#define KERNEL_VERSION_OFFSET 0x10428
#define COMMAND_LINE_OFFSET 0x10480
#ifndef __ASSEMBLY__
@ -74,7 +75,8 @@ struct parmarea {
unsigned long initrd_size; /* 0x10410 */
unsigned long oldmem_base; /* 0x10418 */
unsigned long oldmem_size; /* 0x10420 */
char pad1[0x10480 - 0x10428]; /* 0x10428 - 0x10480 */
unsigned long kernel_version; /* 0x10428 */
char pad1[0x10480 - 0x10430]; /* 0x10430 - 0x10480 */
char command_line[ARCH_COMMAND_LINE_SIZE]; /* 0x10480 */
};

1
arch/s390/include/asm/unistd.h
View File

@ -34,5 +34,6 @@
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_SYS_CLONE3
#endif /* _ASM_S390_UNISTD_H_ */

35
arch/s390/include/uapi/asm/zcrypt.h
View File

@ -20,6 +20,7 @@
#include <linux/ioctl.h>
#include <linux/compiler.h>
#include <linux/types.h>
/* Name of the zcrypt device driver. */
#define ZCRYPT_NAME "zcrypt"
@ -160,17 +161,17 @@ struct ica_xcRB {
* @payload_len: Payload length
*/
struct ep11_cprb {
uint16_t cprb_len;
__u16 cprb_len;
unsigned char cprb_ver_id;
unsigned char pad_000[2];
unsigned char flags;
unsigned char func_id[2];
uint32_t source_id;
uint32_t target_id;
uint32_t ret_code;
uint32_t reserved1;
uint32_t reserved2;
uint32_t payload_len;
__u32 source_id;
__u32 target_id;
__u32 ret_code;
__u32 reserved1;
__u32 reserved2;
__u32 payload_len;
} __attribute__((packed));
/**
@ -179,8 +180,8 @@ struct ep11_cprb {
* @dom_id: Usage domain id
*/
struct ep11_target_dev {
uint16_t ap_id;
uint16_t dom_id;
__u16 ap_id;
__u16 dom_id;
};
/**
@ -195,14 +196,14 @@ struct ep11_target_dev {
* @resp: Addr to response block
*/
struct ep11_urb {
uint16_t targets_num;
uint64_t targets;
uint64_t weight;
uint64_t req_no;
uint64_t req_len;
uint64_t req;
uint64_t resp_len;
uint64_t resp;
__u16 targets_num;
__u64 targets;
__u64 weight;
__u64 req_no;
__u64 req_len;
__u64 req;
__u64 resp_len;
__u64 resp;
} __attribute__((packed));
/**

2
arch/s390/kernel/syscalls/syscall.tbl
View File

@ -437,4 +437,4 @@
432 common fsmount sys_fsmount sys_fsmount
433 common fspick sys_fspick sys_fspick
434 common pidfd_open sys_pidfd_open sys_pidfd_open
# 435 reserved for clone3
435 common clone3 sys_clone3 sys_clone3

6
arch/s390/mm/pgalloc.c
View File

@ -17,8 +17,6 @@
#ifdef CONFIG_PGSTE
static int page_table_allocate_pgste_min = 0;
static int page_table_allocate_pgste_max = 1;
int page_table_allocate_pgste = 0;
EXPORT_SYMBOL(page_table_allocate_pgste);
@ -29,8 +27,8 @@ static struct ctl_table page_table_sysctl[] = {
.maxlen = sizeof(int),
.mode = S_IRUGO | S_IWUSR,
.proc_handler = proc_dointvec_minmax,
.extra1 = &page_table_allocate_pgste_min,
.extra2 = &page_table_allocate_pgste_max,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
},
{ }
};

24
drivers/s390/cio/qdio_main.c
View File

@ -319,9 +319,7 @@ static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit,
int retries = 0, cc;
unsigned long laob = 0;
WARN_ON_ONCE(aob && ((queue_type(q) != QDIO_IQDIO_QFMT) ||
!q->u.out.use_cq));
if (q->u.out.use_cq && aob != 0) {
if (aob) {
fc = QDIO_SIGA_WRITEQ;
laob = aob;
}
@ -621,9 +619,6 @@ static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q,
{
unsigned long phys_aob = 0;
if (!q->use_cq)
return 0;
if (!q->aobs[bufnr]) {
struct qaob *aob = qdio_allocate_aob();
q->aobs[bufnr] = aob;
@ -1308,6 +1303,8 @@ static void qdio_detect_hsicq(struct qdio_irq *irq_ptr)
for_each_output_queue(irq_ptr, q, i) {
if (use_cq) {
if (multicast_outbound(q))
continue;
if (qdio_enable_async_operation(&q->u.out) < 0) {
use_cq = 0;
continue;
@ -1553,18 +1550,19 @@ static int handle_outbound(struct qdio_q *q, unsigned int callflags,
/* One SIGA-W per buffer required for unicast HSI */
WARN_ON_ONCE(count > 1 && !multicast_outbound(q));
phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr);
if (q->u.out.use_cq)
phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr);
rc = qdio_kick_outbound_q(q, phys_aob);
} else if (need_siga_sync(q)) {
rc = qdio_siga_sync_q(q);
} else if (count < QDIO_MAX_BUFFERS_PER_Q &&
get_buf_state(q, prev_buf(bufnr), &state, 0) > 0 &&
state == SLSB_CU_OUTPUT_PRIMED) {
/* The previous buffer is not processed yet, tack on. */
qperf_inc(q, fast_requeue);
} else {
/* try to fast requeue buffers */
get_buf_state(q, prev_buf(bufnr), &state, 0);
if (state != SLSB_CU_OUTPUT_PRIMED)
rc = qdio_kick_outbound_q(q, 0);
else
qperf_inc(q, fast_requeue);
rc = qdio_kick_outbound_q(q, 0);
}
/* in case of SIGA errors we must process the error immediately */

28
drivers/s390/cio/vfio_ccw_cp.c
View File

@ -72,8 +72,10 @@ static int pfn_array_alloc(struct pfn_array *pa, u64 iova, unsigned int len)
sizeof(*pa->pa_iova_pfn) +
sizeof(*pa->pa_pfn),
GFP_KERNEL);
if (unlikely(!pa->pa_iova_pfn))
if (unlikely(!pa->pa_iova_pfn)) {
pa->pa_nr = 0;
return -ENOMEM;
}
pa->pa_pfn = pa->pa_iova_pfn + pa->pa_nr;
pa->pa_iova_pfn[0] = pa->pa_iova >> PAGE_SHIFT;
@ -421,7 +423,7 @@ static int ccwchain_loop_tic(struct ccwchain *chain,
static int ccwchain_handle_ccw(u32 cda, struct channel_program *cp)
{
struct ccwchain *chain;
int len;
int len, ret;
/* Copy 2K (the most we support today) of possible CCWs */
len = copy_from_iova(cp->mdev, cp->guest_cp, cda,
@ -448,7 +450,12 @@ static int ccwchain_handle_ccw(u32 cda, struct channel_program *cp)
memcpy(chain->ch_ccw, cp->guest_cp, len * sizeof(struct ccw1));
/* Loop for tics on this new chain. */
return ccwchain_loop_tic(chain, cp);
ret = ccwchain_loop_tic(chain, cp);
if (ret)
ccwchain_free(chain);
return ret;
}
/* Loop for TICs. */
@ -642,17 +649,16 @@ int cp_init(struct channel_program *cp, struct device *mdev, union orb *orb)
/* Build a ccwchain for the first CCW segment */
ret = ccwchain_handle_ccw(orb->cmd.cpa, cp);
if (ret)
cp_free(cp);
/* It is safe to force: if not set but idals used
* ccwchain_calc_length returns an error.
*/
cp->orb.cmd.c64 = 1;
if (!ret)
if (!ret) {
cp->initialized = true;
/* It is safe to force: if it was not set but idals used
* ccwchain_calc_length would have returned an error.
*/
cp->orb.cmd.c64 = 1;
}
return ret;
}

2
drivers/s390/cio/vfio_ccw_drv.c
View File

@ -88,7 +88,7 @@ static void vfio_ccw_sch_io_todo(struct work_struct *work)
(SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT));
if (scsw_is_solicited(&irb->scsw)) {
cp_update_scsw(&private->cp, &irb->scsw);
if (is_final)
if (is_final && private->state == VFIO_CCW_STATE_CP_PENDING)
cp_free(&private->cp);
}
mutex_lock(&private->io_mutex);

4
drivers/s390/virtio/virtio_ccw.c
View File

@ -145,6 +145,8 @@ struct airq_info {
struct airq_iv *aiv;
};
static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
static DEFINE_MUTEX(airq_areas_lock);
static u8 *summary_indicators;
static inline u8 *get_summary_indicator(struct airq_info *info)
@ -265,9 +267,11 @@ static unsigned long get_airq_indicator(struct virtqueue *vqs[], int nvqs,
unsigned long bit, flags;
for (i = 0; i < MAX_AIRQ_AREAS && !indicator_addr; i++) {
mutex_lock(&airq_areas_lock);
if (!airq_areas[i])
airq_areas[i] = new_airq_info(i);
info = airq_areas[i];
mutex_unlock(&airq_areas_lock);
if (!info)
return 0;
write_lock_irqsave(&info->lock, flags);

4
usr/include/Makefile
View File

@ -101,10 +101,6 @@ ifeq ($(SRCARCH),riscv)
header-test- += linux/bpf_perf_event.h
endif
ifeq ($(SRCARCH),s390)
header-test- += asm/zcrypt.h
endif
ifeq ($(SRCARCH),sparc)
header-test- += asm/stat.h
header-test- += asm/uctx.h