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authorDavidlohr Bueso <dave@stgolabs.net>2019-01-03 23:27:12 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-04 21:13:46 (GMT)
commit21877e1a5b520132f54515f8835c963056418b4c (patch)
tree0d2134af802d232c928ddb92fa1420316b29fa9c
parent76699a67f3041ff4c7af6d6ee9be2bfbf1ffb671 (diff)
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>
-rw-r--r--fs/eventpoll.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index fb7f05f..68e27d1 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;

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