tree 8765a482ab31db66f3cc9cab83bf67eaafe88f75
parent 1e78277ccbbb48af32a618d1ef0e8534e0b648d7
author Michel Lespinasse <walken@google.com> 1367934352 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1367936416 -0700

rwsem: simplify rwsem_down_read_failed

When trying to acquire a read lock, the RWSEM_ACTIVE_READ_BIAS
adjustment doesn't cause other readers to block, so we never have to
worry about waking them back after canceling this adjustment in
rwsem_down_read_failed().

We also never want to steal the lock in rwsem_down_read_failed(), so we
don't have to grab the wait_lock either.

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>