commit d08242303cea836fd2587d776e5c743b3e02ae2a
Author: David S. Miller <[EMAIL PROTECTED]>
Date: Mon Apr 7 00:25:20 2008 -0700
SPARC64: Fix atomic backoff limit.
Upstream commit: 4cfea5a7dfcc2766251e50ca30271a782d5004ad
4096 will not fit into the immediate field of a compare instruction,
in fact it will end up being -4096 causing the check to fail every
time and thus disabling backoff.
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
Signed-off-by: Chris Wright <[EMAIL PROTECTED]>
diff --git a/include/asm-sparc64/backoff.h b/include/asm-sparc64/backoff.h
index dadd6c3..fa1fdf6 100644
--- a/include/asm-sparc64/backoff.h
+++ b/include/asm-sparc64/backoff.h
@@ -12,7 +12,8 @@
mov reg, tmp; \
88: brnz,pt tmp, 88b; \
sub tmp, 1, tmp; \
- cmp reg, BACKOFF_LIMIT; \
+ set BACKOFF_LIMIT, tmp; \
+ cmp reg, tmp; \
bg,pn %xcc, label; \
nop; \
ba,pt %xcc, label; \
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