Evolution-X-Devices/kernel_xiaomi_garnet
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XArray: Add calls to might_alloc()

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[ Upstream commit 1dd685c414a7b9fdb3d23aca3aedae84f0b998ae ]

Catch bogus GFP flags deterministically, instead of occasionally
when we actually have to allocate memory.

Reported-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Stable-dep-of: 99765233ab42 ("NFS: Fixup allocation flags for nfsiod's __GFP_NORETRY")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Matthew Wilcox (Oracle)
2022-07-06 14:51:00 -04:00
committed by Greg Kroah-Hartman
parent 520fe579d0
commit 1e9a17bce9
2 changed files with 17 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
include/linux/xarray.h
View File

@@ -15,6 +15,7 @@
#include <linux/kconfig.h>
#include <linux/kernel.h>
#include <linux/rcupdate.h>
#include <linux/sched/mm.h>
#include <linux/spinlock.h>
#include <linux/types.h>
@@ -583,6 +584,7 @@ static inline void *xa_store_bh(struct xarray *xa, unsigned long index,
{
void *curr;
might_alloc(gfp);
xa_lock_bh(xa);
curr = __xa_store(xa, index, entry, gfp);
xa_unlock_bh(xa);
@@ -609,6 +611,7 @@ static inline void *xa_store_irq(struct xarray *xa, unsigned long index,
{
void *curr;
might_alloc(gfp);
xa_lock_irq(xa);
curr = __xa_store(xa, index, entry, gfp);
xa_unlock_irq(xa);
@@ -684,6 +687,7 @@ static inline void *xa_cmpxchg(struct xarray *xa, unsigned long index,
{
void *curr;
might_alloc(gfp);
xa_lock(xa);
curr = __xa_cmpxchg(xa, index, old, entry, gfp);
xa_unlock(xa);
@@ -711,6 +715,7 @@ static inline void *xa_cmpxchg_bh(struct xarray *xa, unsigned long index,
{
void *curr;
might_alloc(gfp);
xa_lock_bh(xa);
curr = __xa_cmpxchg(xa, index, old, entry, gfp);
xa_unlock_bh(xa);
@@ -738,6 +743,7 @@ static inline void *xa_cmpxchg_irq(struct xarray *xa, unsigned long index,
{
void *curr;
might_alloc(gfp);
xa_lock_irq(xa);
curr = __xa_cmpxchg(xa, index, old, entry, gfp);
xa_unlock_irq(xa);
@@ -767,6 +773,7 @@ static inline int __must_check xa_insert(struct xarray *xa,
{
int err;
might_alloc(gfp);
xa_lock(xa);
err = __xa_insert(xa, index, entry, gfp);
xa_unlock(xa);
@@ -796,6 +803,7 @@ static inline int __must_check xa_insert_bh(struct xarray *xa,
{
int err;
might_alloc(gfp);
xa_lock_bh(xa);
err = __xa_insert(xa, index, entry, gfp);
xa_unlock_bh(xa);
@@ -825,6 +833,7 @@ static inline int __must_check xa_insert_irq(struct xarray *xa,
{
int err;
might_alloc(gfp);
xa_lock_irq(xa);
err = __xa_insert(xa, index, entry, gfp);
xa_unlock_irq(xa);
@@ -854,6 +863,7 @@ static inline __must_check int xa_alloc(struct xarray *xa, u32 *id,
{
int err;
might_alloc(gfp);
xa_lock(xa);
err = __xa_alloc(xa, id, entry, limit, gfp);
xa_unlock(xa);
@@ -883,6 +893,7 @@ static inline int __must_check xa_alloc_bh(struct xarray *xa, u32 *id,
{
int err;
might_alloc(gfp);
xa_lock_bh(xa);
err = __xa_alloc(xa, id, entry, limit, gfp);
xa_unlock_bh(xa);
@@ -912,6 +923,7 @@ static inline int __must_check xa_alloc_irq(struct xarray *xa, u32 *id,
{
int err;
might_alloc(gfp);
xa_lock_irq(xa);
err = __xa_alloc(xa, id, entry, limit, gfp);
xa_unlock_irq(xa);
@@ -945,6 +957,7 @@ static inline int xa_alloc_cyclic(struct xarray *xa, u32 *id, void *entry,
{
int err;
might_alloc(gfp);
xa_lock(xa);
err = __xa_alloc_cyclic(xa, id, entry, limit, next, gfp);
xa_unlock(xa);
@@ -978,6 +991,7 @@ static inline int xa_alloc_cyclic_bh(struct xarray *xa, u32 *id, void *entry,
{
int err;
might_alloc(gfp);
xa_lock_bh(xa);
err = __xa_alloc_cyclic(xa, id, entry, limit, next, gfp);
xa_unlock_bh(xa);
@@ -1011,6 +1025,7 @@ static inline int xa_alloc_cyclic_irq(struct xarray *xa, u32 *id, void *entry,
{
int err;
might_alloc(gfp);
xa_lock_irq(xa);
err = __xa_alloc_cyclic(xa, id, entry, limit, next, gfp);
xa_unlock_irq(xa);

2
tools/include/linux/sched/mm.h
View File

@@ -1,4 +1,6 @@
#ifndef _TOOLS_PERF_LINUX_SCHED_MM_H
#define _TOOLS_PERF_LINUX_SCHED_MM_H
#define might_alloc(gfp) do { } while (0)
#endif /* _TOOLS_PERF_LINUX_SCHED_MM_H */