diff options
| author | Davide Libenzi <davidel@xmailserver.org> | 2008-10-15 22:01:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 11:21:32 -0700 |
| commit | f337b9c58332bdecde965b436e47ea4c94d30da0 (patch) | |
| tree | 0b630e4cd2cc19f29d56716162defa301f82bf65 /fs | |
| parent | 8b6e47ad062e6ac993fb80256344fc499c1e827b (diff) | |
| download | lwn-f337b9c58332bdecde965b436e47ea4c94d30da0.tar.gz lwn-f337b9c58332bdecde965b436e47ea4c94d30da0.zip | |
epoll: drop unnecessary test
Thomas found that there is an unnecessary (always true) test in
ep_send_events(). The callback never inserts into ->rdllink while the
send loop is performed, and also does the ~EP_PRIVATE_BITS test. Given
we're holding the mutex during this time, the conditions tested inside the
loop are always true. This patch drops the test done inside the
re-insertion loop.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/eventpoll.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 7cc0eb756b55..99368bda0261 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -927,14 +927,11 @@ errxit: /* * During the time we spent in the loop above, some other events * might have been queued by the poll callback. We re-insert them - * here (in case they are not already queued, or they're one-shot). + * inside the main ready-list here. */ for (nepi = ep->ovflist; (epi = nepi) != NULL; - nepi = epi->next, epi->next = EP_UNACTIVE_PTR) { - if (!ep_is_linked(&epi->rdllink) && - (epi->event.events & ~EP_PRIVATE_BITS)) - list_add_tail(&epi->rdllink, &ep->rdllist); - } + nepi = epi->next, epi->next = EP_UNACTIVE_PTR) + list_add_tail(&epi->rdllink, &ep->rdllist); /* * We need to set back ep->ovflist to EP_UNACTIVE_PTR, so that after * releasing the lock, events will be queued in the normal way inside |