diff options
| author | Jan Kara <jack@suse.com> | 2015-09-04 15:43:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-04 16:54:41 -0700 |
| commit | 4712e722f91457e60723b9cef6265a74290efba9 (patch) | |
| tree | b6b4bf48018d23c180cb7407ea1ff58402664e5c /include/linux/fsnotify_backend.h | |
| parent | 925d1132a03e33cb8f29a0057300d023b4f1be23 (diff) | |
fsnotify: get rid of fsnotify_destroy_mark_locked()
fsnotify_destroy_mark_locked() is subtle to use because it temporarily
releases group->mark_mutex. To avoid future problems with this
function, split it into two.
fsnotify_detach_mark() is the part that needs group->mark_mutex and
fsnotify_free_mark() is the part that must be called outside of
group->mark_mutex. This way it's much clearer what's going on and we
also avoid some pointless acquisitions of group->mark_mutex.
Signed-off-by: Jan Kara <jack@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/fsnotify_backend.h')
| -rw-r--r-- | include/linux/fsnotify_backend.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index f044fe30e8c3..e0727d77feaf 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -236,6 +236,7 @@ struct fsnotify_mark { #define FSNOTIFY_MARK_FLAG_OBJECT_PINNED 0x04 #define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x08 #define FSNOTIFY_MARK_FLAG_ALIVE 0x10 +#define FSNOTIFY_MARK_FLAG_ATTACHED 0x20 unsigned int flags; /* flags [mark->lock] */ void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */ }; @@ -353,8 +354,10 @@ extern int fsnotify_add_mark_locked(struct fsnotify_mark *mark, struct fsnotify_ /* given a group and a mark, flag mark to be freed when all references are dropped */ extern void fsnotify_destroy_mark(struct fsnotify_mark *mark, struct fsnotify_group *group); -extern void fsnotify_destroy_mark_locked(struct fsnotify_mark *mark, - struct fsnotify_group *group); +/* detach mark from inode / mount list, group list, drop inode reference */ +extern void fsnotify_detach_mark(struct fsnotify_mark *mark); +/* free mark */ +extern void fsnotify_free_mark(struct fsnotify_mark *mark); /* run all the marks in a group, and clear all of the vfsmount marks */ extern void fsnotify_clear_vfsmount_marks_by_group(struct fsnotify_group *group); /* run all the marks in a group, and clear all of the inode marks */ |