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[SPARC64]: Fix atomic backoff limit.
author
David S. Miller
<davem@davemloft.net>
Wed, 19 Mar 2008 08:04:48 +0000
(
01:04
-0700)
committer
David S. Miller
<davem@davemloft.net>
Wed, 19 Mar 2008 08:04:48 +0000
(
01:04
-0700)
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 <davem@davemloft.net>
include/asm-sparc64/backoff.h
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diff --git
a/include/asm-sparc64/backoff.h
b/include/asm-sparc64/backoff.h
index dadd6c385c6c0f31bb6c40f0b27af1e478e90d2a..fa1fdf67e350e07d950107289f25bdf3c41a73b3 100644
(file)
--- 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; \