]> git.baikalelectronics.ru Git - kernel.git/commit
rwsem: simplify rwsem_down_read_failed
authorMichel Lespinasse <walken@google.com>
Tue, 7 May 2013 13:45:52 +0000 (06:45 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 7 May 2013 14:20:16 +0000 (07:20 -0700)
commit943ed7fe7172fdf5fc1c0639922ea01e7ee522f8
tree8765a482ab31db66f3cc9cab83bf67eaafe88f75
parent426b104358bdbaf4271e303e1cd8004e99053e40
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>
lib/rwsem.c