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[SPARC64]: Fix atomic backoff limit.

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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>
This commit is contained in:
David S. Miller 2008-03-19 01:04:48 -07:00
parent f0e98c387e
commit 4cfea5a7df
1 changed files with 2 additions and 1 deletions
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3
include/asm-sparc64/backoff.h
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@ -12,7 +12,8 @@
mov reg, tmp; \ mov reg, tmp; \
88: brnz,pt tmp, 88b; \ 88: brnz,pt tmp, 88b; \
sub tmp, 1, tmp; \ sub tmp, 1, tmp; \
cmp reg, BACKOFF_LIMIT; \ set BACKOFF_LIMIT, tmp; \
cmp reg, tmp; \
bg,pn %xcc, label; \ bg,pn %xcc, label; \
nop; \ nop; \
ba,pt %xcc, label; \ ba,pt %xcc, label; \