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Diffstat (limited to 'arch/sparc/include/asm/backoff.h')
-rw-r--r--arch/sparc/include/asm/backoff.h32
1 files changed, 19 insertions, 13 deletions
diff --git a/arch/sparc/include/asm/backoff.h b/arch/sparc/include/asm/backoff.h
index 64b077b3b13b..20f01df0871b 100644
--- a/arch/sparc/include/asm/backoff.h
+++ b/arch/sparc/include/asm/backoff.h
@@ -11,19 +11,25 @@
#define BACKOFF_LABEL(spin_label, continue_label) \
spin_label
-#define BACKOFF_SPIN(reg, tmp, label) \
- mov reg, tmp; \
-88: rd %ccr, %g0; \
- rd %ccr, %g0; \
- rd %ccr, %g0; \
- brnz,pt tmp, 88b; \
- sub tmp, 1, tmp; \
- set BACKOFF_LIMIT, tmp; \
- cmp reg, tmp; \
- bg,pn %xcc, label; \
- nop; \
- ba,pt %xcc, label; \
- sllx reg, 1, reg;
+#define BACKOFF_SPIN(reg, tmp, label) \
+ mov reg, tmp; \
+88: rd %ccr, %g0; \
+ rd %ccr, %g0; \
+ rd %ccr, %g0; \
+ .section .pause_patch,"ax"; \
+ .word 88b; \
+ sllx tmp, 7, tmp; \
+ wr tmp, 0, %asr27; \
+ clr tmp; \
+ .previous; \
+ brnz,pt tmp, 88b; \
+ sub tmp, 1, tmp; \
+ set BACKOFF_LIMIT, tmp; \
+ cmp reg, tmp; \
+ bg,pn %xcc, label; \
+ nop; \
+ ba,pt %xcc, label; \
+ sllx reg, 1, reg;
#else