[patch 09/23] Add cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64

Mathieu Desnoyers
2007-08-20T20:22:16Z

[-- Attachment #1: add-cmpxchg-local-to-ia64.patch --]
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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.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: clameter@sgi.com
CC: tony.luck@intel.com
CC: Keith Owens <kaos@ocs.com.au>
---
include/asm-ia64/intrinsics.h | 4 ++++
1 file changed, 4 insertions(+)

Index: linux-2.6-lttng/include/asm-ia64/intrinsics.h
===================================================================
--- linux-2.6-lttng.orig/include/asm-ia64/intrinsics.h 2007-08-12 09:33:57.000000000 -0400
+++ linux-2.6-lttng/include/asm-ia64/intrinsics.h 2007-08-12 15:09:49.000000000 -0400
@@ -158,6 +158,10 @@ extern long ia64_cmpxchg_called_with_bad

/* for compatibility with other platforms: */
#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;