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| author | Ian Kent <raven@themaw.net> | 2006-03-27 01:14:59 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-27 08:44:41 -0800 |
| commit | 3e7b19198003fc25b11838e709f17d4fa173b2d7 (patch) | |
| tree | 6d78904c52b5c96c1c6f59544658235ef2a3c1ab | |
| parent | 871f94344cea36b2ce91231f442f9f9298529712 (diff) | |
| download | linux-3e7b19198003fc25b11838e709f17d4fa173b2d7.tar.gz linux-3e7b19198003fc25b11838e709f17d4fa173b2d7.tar.bz2 linux-3e7b19198003fc25b11838e709f17d4fa173b2d7.zip | |
[PATCH] autofs4: atomic var underflow
Fix accidental underflow of the atomic counter.
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | fs/autofs4/autofs_i.h | 2 | ||||
| -rw-r--r-- | fs/autofs4/waitq.c | 6 |
2 files changed, 5 insertions, 3 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index ff6239d57b4b..617fd7b37447 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -85,7 +85,7 @@ struct autofs_wait_queue { pid_t tgid; /* This is for status reporting upon return */ int status; - atomic_t notified; + atomic_t notify; atomic_t wait_ctr; }; diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c index 894d74671bd0..142ab6aa2aa1 100644 --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -263,7 +263,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, wq->tgid = current->tgid; wq->status = -EINTR; /* Status return if interrupted */ atomic_set(&wq->wait_ctr, 2); - atomic_set(&wq->notified, 1); + atomic_set(&wq->notify, 1); mutex_unlock(&sbi->wq_mutex); } else { atomic_inc(&wq->wait_ctr); @@ -273,9 +273,11 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, (unsigned long) wq->wait_queue_token, wq->len, wq->name, notify); } - if (notify != NFY_NONE && atomic_dec_and_test(&wq->notified)) { + if (notify != NFY_NONE && atomic_read(&wq->notify)) { int type; + atomic_dec(&wq->notify); + if (sbi->version < 5) { if (notify == NFY_MOUNT) type = autofs_ptype_missing; |