powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER

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>

1 files changed, 10 insertions, 6 deletions

diff --git a/arch/powerpc/include/asm/bitops.h b/arch/powerpc/include/asm/bitops.h
index 3c7c37bd92e..30964ae2d09 100644
--- a/arch/powerpc/include/asm/bitops.h
+++ b/arch/powerpc/include/asm/bitops.h
@@ -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);
 }