x86, rwsem: Stay on fast path when count > 0 in __up_write()

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When count > 0 there is no need to take the call_rwsem_wake path.  If
we did take that path, it would just return without doing anything due
to the active count not being zero.

Signed-off-by: Michel Lespinasse <walken@google.com>
LKML-Reference: <201007202219.o6KMJj9x021042@imap1.linux-foundation.org>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Mike Waychison <mikew@google.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

...

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Michel Lespinasse 2010-07-20 15:19:45 -07:00 • committed by H. Peter Anvin

parent e0959371b4

commit a751bd858b

1 changed files with 2 additions and 3 deletions

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arch/x86/include/asm/rwsem.h

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