diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-18 15:57:31 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-18 15:57:31 -0700 |
commit | 665ab0f3c8b8f86bb77b25285ac93870c7054d63 (patch) | |
tree | c7d12c3559982eb3fb1847438d4b45ce034851e5 /arch/alpha/include/asm/cmpxchg.h | |
parent | bf03f65b7967df5807ddef7b99f8a41d4c94fc70 (diff) | |
parent | e816b57a337ea3b755de72bec38c10c864f23015 (diff) |
Merge 3.4-rc3 into tty-next
This allows us to pick up some changes needed for other serial patches.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/alpha/include/asm/cmpxchg.h')
-rw-r--r-- | arch/alpha/include/asm/cmpxchg.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/cmpxchg.h b/arch/alpha/include/asm/cmpxchg.h new file mode 100644 index 00000000000..429e8cd0d78 --- /dev/null +++ b/arch/alpha/include/asm/cmpxchg.h @@ -0,0 +1,71 @@ +#ifndef _ALPHA_CMPXCHG_H +#define _ALPHA_CMPXCHG_H + +/* + * Atomic exchange routines. + */ + +#define __ASM__MB +#define ____xchg(type, args...) __xchg ## type ## _local(args) +#define ____cmpxchg(type, args...) __cmpxchg ## type ## _local(args) +#include <asm/xchg.h> + +#define xchg_local(ptr, x) \ +({ \ + __typeof__(*(ptr)) _x_ = (x); \ + (__typeof__(*(ptr))) __xchg_local((ptr), (unsigned long)_x_, \ + sizeof(*(ptr))); \ +}) + +#define cmpxchg_local(ptr, o, n) \ +({ \ + __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _n_ = (n); \ + (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \ + (unsigned long)_n_, \ + sizeof(*(ptr))); \ +}) + +#define cmpxchg64_local(ptr, o, n) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg_local((ptr), (o), (n)); \ +}) + +#ifdef CONFIG_SMP +#undef __ASM__MB +#define __ASM__MB "\tmb\n" +#endif +#undef ____xchg +#undef ____cmpxchg +#define ____xchg(type, args...) __xchg ##type(args) +#define ____cmpxchg(type, args...) __cmpxchg ##type(args) +#include <asm/xchg.h> + +#define xchg(ptr, x) \ +({ \ + __typeof__(*(ptr)) _x_ = (x); \ + (__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, \ + sizeof(*(ptr))); \ +}) + +#define cmpxchg(ptr, o, n) \ +({ \ + __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _n_ = (n); \ + (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ + (unsigned long)_n_, sizeof(*(ptr)));\ +}) + +#define cmpxchg64(ptr, o, n) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg((ptr), (o), (n)); \ +}) + +#undef __ASM__MB +#undef ____cmpxchg + +#define __HAVE_ARCH_CMPXCHG 1 + +#endif /* _ALPHA_CMPXCHG_H */ |