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| author | Davidlohr Bueso <dave@stgolabs.net> | 2019-01-03 15:27:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-04 13:13:46 -0800 |
| commit | 21877e1a5b520132f54515f8835c963056418b4c (patch) | |
| tree | 0d2134af802d232c928ddb92fa1420316b29fa9c /fs/eventpoll.c | |
| parent | 76699a67f3041ff4c7af6d6ee9be2bfbf1ffb671 (diff) | |
| download | linux-stable-21877e1a5b520132f54515f8835c963056418b4c.tar.gz linux-stable-21877e1a5b520132f54515f8835c963056418b4c.tar.bz2 linux-stable-21877e1a5b520132f54515f8835c963056418b4c.zip | |
fs/epoll: robustify ep->mtx held checks
Insted of just commenting how important it is, lets make it more robust
and add a lockdep_assert_held() call.
Link: http://lkml.kernel.org/r/20181108051006.18751-5-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jason Baron <jbaron@akamai.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/eventpoll.c')
| -rw-r--r-- | fs/eventpoll.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index fb7f05f4099d..68e27d1cb5cd 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1637,6 +1637,8 @@ static __poll_t ep_send_events_proc(struct eventpoll *ep, struct list_head *head * Items cannot vanish during the loop because ep_scan_ready_list() is * holding "mtx" during this call. */ + lockdep_assert_held(&ep->mtx); + list_for_each_entry_safe(epi, tmp, head, rdllink) { if (esed->res >= esed->maxevents) break; |