diff options
Diffstat (limited to 'arch/parisc/kernel/syscall.S')
| -rw-r--r-- | arch/parisc/kernel/syscall.S | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S index 4f77bd9be66b..97ac707c6bff 100644 --- a/arch/parisc/kernel/syscall.S +++ b/arch/parisc/kernel/syscall.S @@ -48,7 +48,7 @@ registers). */ #define KILL_INSN break 0,0 - .level LEVEL + .level PA_ASM_LEVEL .text @@ -640,7 +640,10 @@ cas_action: sub,<> %r28, %r25, %r0 2: stw %r24, 0(%r26) /* Free lock */ - sync +#ifdef CONFIG_SMP +98: LDCW 0(%sr2,%r20), %r1 /* Barrier */ +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) +#endif stw %r20, 0(%sr2,%r20) #if ENABLE_LWS_DEBUG /* Clear thread register indicator */ @@ -655,7 +658,10 @@ cas_action: 3: /* Error occurred on load or store */ /* Free lock */ - sync +#ifdef CONFIG_SMP +98: LDCW 0(%sr2,%r20), %r1 /* Barrier */ +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) +#endif stw %r20, 0(%sr2,%r20) #if ENABLE_LWS_DEBUG stw %r0, 4(%sr2,%r20) @@ -857,7 +863,10 @@ cas2_action: cas2_end: /* Free lock */ - sync +#ifdef CONFIG_SMP +98: LDCW 0(%sr2,%r20), %r1 /* Barrier */ +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) +#endif stw %r20, 0(%sr2,%r20) /* Enable interrupts */ ssm PSW_SM_I, %r0 @@ -868,7 +877,10 @@ cas2_end: 22: /* Error occurred on load or store */ /* Free lock */ - sync +#ifdef CONFIG_SMP +98: LDCW 0(%sr2,%r20), %r1 /* Barrier */ +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) +#endif stw %r20, 0(%sr2,%r20) ssm PSW_SM_I, %r0 ldo 1(%r0),%r28 |