Commit-ID: caa17d49f9a5cc09b3bbb101dc640f914f3b4ff7
Gitweb: http://git.kernel.org/tip/caa17d49f9a5cc09b3bbb101dc640f914f3b4ff7
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Tue, 2 Sep 2014 11:40:16 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 10 Sep 2014 11:45:04 +0200
locking, sparc64: Fix atomics
The patch folding the atomic ops had a silly fail in the _return primitives.
Fixes: 4f3316c2b5fe ("locking,arch,sparc: Fold atomic_ops")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: sparclinux@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/20140902094016.GD31157@xxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/sparc/lib/atomic_64.S | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/sparc/lib/atomic_64.S b/arch/sparc/lib/atomic_64.S
index 96d70b4..05dac43 100644
--- a/arch/sparc/lib/atomic_64.S
+++ b/arch/sparc/lib/atomic_64.S
@@ -37,7 +37,7 @@ ENTRY(atomic_##op##_return) /* %o0 = increment, %o1 = atomic_ptr */ \
cas [%o1], %g1, %g7; \
cmp %g1, %g7; \
bne,pn %icc, BACKOFF_LABEL(2f, 1b); \
- add %g1, %o0, %g1; \
+ op %g1, %o0, %g1; \
retl; \
sra %g1, 0, %o0; \
2: BACKOFF_SPIN(%o2, %o3, 1b); \
@@ -76,7 +76,7 @@ ENTRY(atomic64_##op##_return) /* %o0 = increment, %o1 = atomic_ptr */ \
bne,pn %xcc, BACKOFF_LABEL(2f, 1b); \
nop; \
retl; \
- add %g1, %o0, %o0; \
+ op %g1, %o0, %o0; \
2: BACKOFF_SPIN(%o2, %o3, 1b); \
ENDPROC(atomic64_##op##_return);
--
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