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fsnotify: Add missing annotation for fsnotify_finish_user_wait() and for fsnotify_prepare_user_wait()

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Sparse reports warnings at fsnotify_prepare_user_wait()
	and at fsnotify_finish_user_wait()

warning: context imbalance in fsnotify_finish_user_wait()
	- wrong count at exit
warning: context imbalance in fsnotify_prepare_user_wait()
	- unexpected unlock

The root cause is the missing annotation at fsnotify_finish_user_wait()
	and at fsnotify_prepare_user_wait()
fsnotify_prepare_user_wait() has an extra annotation __release()
 that only tell Sparse and not GCC to shutdown the warning

Add the missing  __acquires(&fsnotify_mark_srcu) annotation
Add the missing __releases(&fsnotify_mark_srcu) annotation
Add the __release(&fsnotify_mark_srcu) annotation.

Link: https://lore.kernel.org/r/20200413214240.15245-1-jbi.octave@gmail.com
Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jules Irenge 2020-04-13 22:42:40 +01:00 committed by Jan Kara
parent 8632e9b564
commit 00e0afb658
1 changed files with 5 additions and 1 deletions
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6
fs/notify/mark.c
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@ -325,13 +325,16 @@ static void fsnotify_put_mark_wake(struct fsnotify_mark *mark)
}
bool fsnotify_prepare_user_wait(struct fsnotify_iter_info *iter_info)
__releases(&fsnotify_mark_srcu)
{
int type;
fsnotify_foreach_obj_type(type) {
/* This can fail if mark is being removed */
if (!fsnotify_get_mark_safe(iter_info->marks[type]))
if (!fsnotify_get_mark_safe(iter_info->marks[type])) {
__release(&fsnotify_mark_srcu);
goto fail;
}
}
/*
@ -350,6 +353,7 @@ fail:
}
void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info)
__acquires(&fsnotify_mark_srcu)
{
int type;