Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=14e0cb3c60b89c4a2512852ffc18601c72314a0f
Commit: 14e0cb3c60b89c4a2512852ffc18601c72314a0f
Parent: 7732ba3abc5a53e7e1d93afd5a5a6ccf74f2ce53
Author: Mathieu Desnoyers <[EMAIL PROTECTED]>
AuthorDate: Thu Feb 7 00:16:14 2008 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Thu Feb 7 08:42:32 2008 -0800
Add cmpxchg_local to frv
Use the new generic cmpxchg_local (disables interrupt) for 8, 16 and 64 bits
arguments. Use the 32 bits cmpxchg available on the architecture for 32 bits
arguments.
Signed-off-by: Mathieu Desnoyers <[EMAIL PROTECTED]>
Cc: David Howells <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
include/asm-frv/system.h | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/include/asm-frv/system.h b/include/asm-frv/system.h
index 9f5663b..59be544 100644
--- a/include/asm-frv/system.h
+++ b/include/asm-frv/system.h
@@ -268,5 +268,29 @@ extern uint32_t __cmpxchg_32(uint32_t *v, uint32_t test,
uint32_t new);
#endif
+#include <asm-generic/cmpxchg-local.h>
+
+static inline unsigned long __cmpxchg_local(volatile void *ptr,
+ unsigned long old,
+ unsigned long new, int size)
+{
+ switch (size) {
+ case 4:
+ return cmpxchg(ptr, old, new);
+ default:
+ return __cmpxchg_local_generic(ptr, old, new, size);
+ }
+
+ return old;
+}
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n) \
+ ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \
+ (unsigned long)(n), sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
#endif /* _ASM_SYSTEM_H */
-
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