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IA64: Slim down __clear_bit_unlock
authorChristoph Lameter <clameter@sgi.com>
Wed, 19 Dec 2007 00:22:46 +0000 (16:22 -0800)
committerTony Luck <tony.luck@intel.com>
Wed, 19 Dec 2007 00:22:46 +0000 (16:22 -0800)
commita3ebdb6c423dff420168a3faf25c76e9e5f59258
tree397317fda83da7f745d802d5ba87735f163bf1c9tree | snapshot (tar.gz zip)
parentc63a1190368771b8207d86c4217ae4afdf1cbd5ecommit | diff
IA64: Slim down __clear_bit_unlock

__clear_bit_unlock does not need to perform atomic operations on the
variable.  Avoid a cmpxchg and simply do a store with release semantics.
Add a barrier to be safe that the compiler does not do funky things.

Tony: Use intrinsic rather than inline assembler

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
include/asm-ia64/bitops.h diff | blob | blame | history
include/asm-ia64/gcc_intrin.h diff | blob | blame | history
include/asm-ia64/intel_intrin.h diff | blob | blame | history