diff options
Diffstat (limited to 'arch/sparc64/lib/atomic.S')
| -rw-r--r-- | arch/sparc64/lib/atomic.S | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/arch/sparc64/lib/atomic.S b/arch/sparc64/lib/atomic.S index 70ac4186f62b..0268210ca168 100644 --- a/arch/sparc64/lib/atomic.S +++ b/arch/sparc64/lib/atomic.S @@ -43,29 +43,10 @@ atomic_sub: /* %o0 = decrement, %o1 = atomic_ptr */ 2: BACKOFF_SPIN(%o2, %o3, 1b) .size atomic_sub, .-atomic_sub - /* On SMP we need to use memory barriers to ensure - * correct memory operation ordering, nop these out - * for uniprocessor. - */ -#ifdef CONFIG_SMP - -#define ATOMIC_PRE_BARRIER membar #StoreLoad | #LoadLoad; -#define ATOMIC_POST_BARRIER \ - ba,pt %xcc, 80b; \ - membar #StoreLoad | #StoreStore - -80: retl - nop -#else -#define ATOMIC_PRE_BARRIER -#define ATOMIC_POST_BARRIER -#endif - .globl atomic_add_ret .type atomic_add_ret,#function atomic_add_ret: /* %o0 = increment, %o1 = atomic_ptr */ BACKOFF_SETUP(%o2) - ATOMIC_PRE_BARRIER 1: lduw [%o1], %g1 add %g1, %o0, %g7 cas [%o1], %g1, %g7 @@ -73,7 +54,6 @@ atomic_add_ret: /* %o0 = increment, %o1 = atomic_ptr */ bne,pn %icc, 2f add %g7, %o0, %g7 sra %g7, 0, %o0 - ATOMIC_POST_BARRIER retl nop 2: BACKOFF_SPIN(%o2, %o3, 1b) @@ -83,7 +63,6 @@ atomic_add_ret: /* %o0 = increment, %o1 = atomic_ptr */ .type atomic_sub_ret,#function atomic_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */ BACKOFF_SETUP(%o2) - ATOMIC_PRE_BARRIER 1: lduw [%o1], %g1 sub %g1, %o0, %g7 cas [%o1], %g1, %g7 @@ -91,7 +70,6 @@ atomic_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */ bne,pn %icc, 2f sub %g7, %o0, %g7 sra %g7, 0, %o0 - ATOMIC_POST_BARRIER retl nop 2: BACKOFF_SPIN(%o2, %o3, 1b) @@ -131,7 +109,6 @@ atomic64_sub: /* %o0 = decrement, %o1 = atomic_ptr */ .type atomic64_add_ret,#function atomic64_add_ret: /* %o0 = increment, %o1 = atomic_ptr */ BACKOFF_SETUP(%o2) - ATOMIC_PRE_BARRIER 1: ldx [%o1], %g1 add %g1, %o0, %g7 casx [%o1], %g1, %g7 @@ -139,7 +116,6 @@ atomic64_add_ret: /* %o0 = increment, %o1 = atomic_ptr */ bne,pn %xcc, 2f add %g7, %o0, %g7 mov %g7, %o0 - ATOMIC_POST_BARRIER retl nop 2: BACKOFF_SPIN(%o2, %o3, 1b) @@ -149,7 +125,6 @@ atomic64_add_ret: /* %o0 = increment, %o1 = atomic_ptr */ .type atomic64_sub_ret,#function atomic64_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */ BACKOFF_SETUP(%o2) - ATOMIC_PRE_BARRIER 1: ldx [%o1], %g1 sub %g1, %o0, %g7 casx [%o1], %g1, %g7 @@ -157,7 +132,6 @@ atomic64_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */ bne,pn %xcc, 2f sub %g7, %o0, %g7 mov %g7, %o0 - ATOMIC_POST_BARRIER retl nop 2: BACKOFF_SPIN(%o2, %o3, 1b) |