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fanotify: don't recalculate a marks mask if only the ignored mask changed 

If removing bits from a mark's ignored mask, the concerning
inodes/vfsmounts mask is not affected.  So don't recalculate it.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lino Sanfilippo 2015-02-10 14:08:24 -08:00 committed by Linus Torvalds
parent a118449a77
commit d2c1874ce6
1 changed files with 4 additions and 3 deletions
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7
fs/notify/fanotify/fanotify_user.c
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@ -487,15 +487,16 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark,
unsigned int flags,
int *destroy)
{
__u32 oldmask;
__u32 oldmask = 0;
spin_lock(&fsn_mark->lock);
if (!(flags & FAN_MARK_IGNORED_MASK)) {
oldmask = fsn_mark->mask;
fsnotify_set_mark_mask_locked(fsn_mark, (oldmask & ~mask));
} else {
oldmask = fsn_mark->ignored_mask;
fsnotify_set_mark_ignored_mask_locked(fsn_mark, (oldmask & ~mask));
__u32 tmask = fsn_mark->ignored_mask & ~mask;
fsnotify_set_mark_ignored_mask_locked(fsn_mark, tmask);
}
*destroy = !(fsn_mark->mask | fsn_mark->ignored_mask);
spin_unlock(&fsn_mark->lock);