fs/epoll: deal with wait_queue only once
There is no reason why we rearm the waitiqueue upon every fetch_events retry (for when events are found yet send_events() fails). If nothing else, this saves four lock operations per retry, and furthermore reduces the scope of the lock even further. [akpm@linux-foundation.org: restore code to original position, fix and reflow comment] Link: http://lkml.kernel.org/r/20181114182532.27981-2-dave@stgolabs.netSigned-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Jason Baron <jbaron@akamai.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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