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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-02-07 00:16:16 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:32 -0800
commit4b78fff6e736cae55dc3fb5570c7ef4037eca9b7 (patch)
tree1ef5848902fd8222fb2280e48d19575a19aa8809 /include/asm-ia64/intrinsics.h
parentaebb77aef4b50a157bf0185de31d1aede3ca2312 (diff)
downloadop-kernel-dev-4b78fff6e736cae55dc3fb5570c7ef4037eca9b7.zip
op-kernel-dev-4b78fff6e736cae55dc3fb5570c7ef4037eca9b7.tar.gz
Add cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64
Add the primitives cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64. They use cmpxchg_acq as underlying macro, just like the already existing ia64 cmpxchg(). Changelog: ia64 cmpxchg_local coding style fix Quoting Keith Owens: As a matter of coding style, I prefer #define cmpxchg_local cmpxchg #define cmpxchg64_local cmpxchg64 Which makes it absolutely clear that they are the same code. With your patch, humans have to do a string compare of two defines to see if they are the same. Note cmpxchg is *not* a performance win vs interrupt disable / enable on IA64. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: Christoph Lameter <clameter@sgi.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Keith Owens <kaos@ocs.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-ia64/intrinsics.h')
-rw-r--r--include/asm-ia64/intrinsics.h12
1 files changed, 9 insertions, 3 deletions
diff --git a/include/asm-ia64/intrinsics.h b/include/asm-ia64/intrinsics.h
index 3a95aa4..f1135b5 100644
--- a/include/asm-ia64/intrinsics.h
+++ b/include/asm-ia64/intrinsics.h
@@ -153,11 +153,17 @@ extern long ia64_cmpxchg_called_with_bad_pointer (void);
(__typeof__(old)) _r_; \
})
-#define cmpxchg_acq(ptr,o,n) ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr)))
-#define cmpxchg_rel(ptr,o,n) ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr)))
+#define cmpxchg_acq(ptr, o, n) \
+ ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr)))
+#define cmpxchg_rel(ptr, o, n) \
+ ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr)))
/* for compatibility with other platforms: */
-#define cmpxchg(ptr,o,n) cmpxchg_acq(ptr,o,n)
+#define cmpxchg(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
+#define cmpxchg64(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
+
+#define cmpxchg_local cmpxchg
+#define cmpxchg64_local cmpxchg64
#ifdef CONFIG_IA64_DEBUG_CMPXCHG
# define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128;
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