diff options
| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2015-04-16 12:47:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-17 09:04:07 -0400 |
| commit | 90f31d0ea88880f780574f3d0bb1a227c4c66ca3 (patch) | |
| tree | 5367f83919939a2d83888b3a1c48e5ba06e0f574 /include/linux/mm_types.h | |
| parent | 0ec62afeb143a34ce78143cf442f879ef68382f7 (diff) | |
mm: rcu-protected get_mm_exe_file()
This patch removes mm->mmap_sem from mm->exe_file read side.
Also it kills dup_mm_exe_file() and moves exe_file duplication into
dup_mmap() where both mmap_sems are locked.
[akpm@linux-foundation.org: fix comment typo]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm_types.h')
| -rw-r--r-- | include/linux/mm_types.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 590630eb59ba..8d37e26a1007 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -429,7 +429,7 @@ struct mm_struct { #endif /* store ref to file /proc/<pid>/exe symlink points to */ - struct file *exe_file; + struct file __rcu *exe_file; #ifdef CONFIG_MMU_NOTIFIER struct mmu_notifier_mm *mmu_notifier_mm; #endif |