Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4b78ff...
Commit: 4b78fff6e736cae55dc3fb5570c7ef4037eca9b7
Parent: aebb77aef4b50a157bf0185de31d1aede3ca2312
Author: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
AuthorDate: Thu Feb 7 00:16:16 2008 -0800
Committer: Linus Torvalds <torvalds@woody.linux-foundation.org>
CommitDate: Thu Feb 7 08:42:32 2008 -0800
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>
---
include/asm-ia64/intrinsics.h | 12 +++++++++---
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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