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powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER

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For performance reasons we are about to change ISYNC_ON_SMP to sometimes be
lwsync. Now that the macro name doesn't make sense, change it and LWSYNC_ON_SMP
to better explain what the barriers are doing.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2010-02-10 01:04:06 +00:00 • committed by Benjamin Herrenschmidt
parent 66d99b8834
commit f10e2e5b4b
7 changed files with 65 additions and 60 deletions
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16
arch/powerpc/include/asm/bitops.h
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@ -78,7 +78,7 @@ static __inline__ void fn(unsigned long mask, \
DEFINE_BITOP(set_bits, or, "", "")
DEFINE_BITOP(clear_bits, andc, "", "")
DEFINE_BITOP(clear_bits_unlock, andc, LWSYNC_ON_SMP, "")
DEFINE_BITOP(clear_bits_unlock, andc, PPC_RELEASE_BARRIER, "")
DEFINE_BITOP(change_bits, xor, "", "")
static __inline__ void set_bit(int nr, volatile unsigned long *addr)
@ -124,10 +124,14 @@ static __inline__ unsigned long fn( \
return (old & mask); \
}
DEFINE_TESTOP(test_and_set_bits, or, LWSYNC_ON_SMP, ISYNC_ON_SMP, 0)
DEFINE_TESTOP(test_and_set_bits_lock, or, "", ISYNC_ON_SMP, 1)
DEFINE_TESTOP(test_and_clear_bits, andc, LWSYNC_ON_SMP, ISYNC_ON_SMP, 0)
DEFINE_TESTOP(test_and_change_bits, xor, LWSYNC_ON_SMP, ISYNC_ON_SMP, 0)
DEFINE_TESTOP(test_and_set_bits, or, PPC_RELEASE_BARRIER,
PPC_ACQUIRE_BARRIER, 0)
DEFINE_TESTOP(test_and_set_bits_lock, or, "",
PPC_ACQUIRE_BARRIER, 1)
DEFINE_TESTOP(test_and_clear_bits, andc, PPC_RELEASE_BARRIER,
PPC_ACQUIRE_BARRIER, 0)
DEFINE_TESTOP(test_and_change_bits, xor, PPC_RELEASE_BARRIER,
PPC_ACQUIRE_BARRIER, 0)
static __inline__ int test_and_set_bit(unsigned long nr,
volatile unsigned long *addr)
@ -158,7 +162,7 @@ static __inline__ int test_and_change_bit(unsigned long nr,
static __inline__ void __clear_bit_unlock(int nr, volatile unsigned long *addr)
{
__asm__ __volatile__(LWSYNC_ON_SMP "" ::: "memory");
__asm__ __volatile__(PPC_RELEASE_BARRIER "" ::: "memory");
__clear_bit(nr, addr);
}