From: Liam Howlett liam.howlett@oracle.com
mainline inclusion from mainline-5.15-rc1 commit 10994316089c9682f2fbe0be0b1e82bcaf5f4e8c category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4RL0T CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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Print to the trace log before releasing the lock to avoid racing with other trace log printers of the same lock type.
Link: https://lkml.kernel.org/r/20210903022041.1843024-1-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Liam.Howlett@oracle.com Suggested-by: Steven Rostedt (VMware) rostedt@goodmis.org Reviewed-by: Matthew Wilcox (Oracle) willy@infradead.org Cc: Michel Lespinasse walken.cr@gmail.com Cc: Vlastimil Babka vbabka@suse.cz Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org (cherry picked from commit 10994316089c9682f2fbe0be0b1e82bcaf5f4e8c) Signed-off-by: Yongqiang Liu liuyongqiang13@huawei.com Reviewed-by: Kefeng Wangwangkefeng.wang@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- include/linux/mmap_lock.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h index 0540f0156f58..b179f1e3541a 100644 --- a/include/linux/mmap_lock.h +++ b/include/linux/mmap_lock.h @@ -101,14 +101,14 @@ static inline bool mmap_write_trylock(struct mm_struct *mm)
static inline void mmap_write_unlock(struct mm_struct *mm) { - up_write(&mm->mmap_lock); __mmap_lock_trace_released(mm, true); + up_write(&mm->mmap_lock); }
static inline void mmap_write_downgrade(struct mm_struct *mm) { - downgrade_write(&mm->mmap_lock); __mmap_lock_trace_acquire_returned(mm, false, true); + downgrade_write(&mm->mmap_lock); }
static inline void mmap_read_lock(struct mm_struct *mm) @@ -140,8 +140,8 @@ static inline bool mmap_read_trylock(struct mm_struct *mm)
static inline void mmap_read_unlock(struct mm_struct *mm) { - up_read(&mm->mmap_lock); __mmap_lock_trace_released(mm, false); + up_read(&mm->mmap_lock); }
static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm) @@ -155,8 +155,8 @@ static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
static inline void mmap_read_unlock_non_owner(struct mm_struct *mm) { - up_read_non_owner(&mm->mmap_lock); __mmap_lock_trace_released(mm, false); + up_read_non_owner(&mm->mmap_lock); }
static inline void mmap_assert_locked(struct mm_struct *mm)