[patch 13/23] Add cmpxchg_local to m86k

Mathieu Desnoyers
2007-08-20T20:52:01Z

[-- Attachment #1: add-cmpxchg-local-to-m68k.patch --]
[-- Type: text/plain, Size: 1870 bytes --]

Use the new generic cmpxchg_local (disables interrupt). Also use the generic
cmpxchg as fallback if SMP is not set.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: clameter@sgi.com
CC: zippel@linux-m68k.org
CC: linux-m68k@lists.linux-m68k.org
---
include/asm-m68k/system.h | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

Index: linux-2.6-lttng/include/asm-m68k/system.h
===================================================================
--- linux-2.6-lttng.orig/include/asm-m68k/system.h 2007-08-07 14:31:51.000000000 -0400
+++ linux-2.6-lttng/include/asm-m68k/system.h 2007-08-07 15:01:41.000000000 -0400
@@ -154,6 +154,10 @@ static inline unsigned long __xchg(unsig
}
#endif

+#include <asm-generic/cmpxchg-local.h>
+
+#define cmpxchg64_local(ptr,o,n) __cmpxchg64_local_generic((ptr), (o), (n))
+
/*
* Atomic compare and exchange. Compare OLD with MEM, if identical,
* store NEW in MEM. Return the initial value in MEM. Success is
@@ -188,6 +192,23 @@ static inline unsigned long __cmpxchg(vo
#define cmpxchg(ptr,o,n)\
((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
(unsigned long)(n),sizeof(*(ptr))))
+#define cmpxchg_local(ptr,o,n)\
+ ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
+ (unsigned long)(n),sizeof(*(ptr))))
+#else
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr,o,n) \
+ (__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o), \
+ (unsigned long)(n), sizeof(*(ptr)))
+
+#ifndef CONFIG_SMP
+#include <asm-generic/cmpxchg.h>
+#endif
+
#endif

#define arch_align_stack(x) (x)