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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/score/include/asm/cmpxchg.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/score/include/asm/cmpxchg.h')
-rw-r--r-- | arch/score/include/asm/cmpxchg.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/score/include/asm/cmpxchg.h b/arch/score/include/asm/cmpxchg.h new file mode 100644 index 00000000..f384839c --- /dev/null +++ b/arch/score/include/asm/cmpxchg.h @@ -0,0 +1,49 @@ +#ifndef _ASM_SCORE_CMPXCHG_H +#define _ASM_SCORE_CMPXCHG_H + +#include <linux/irqflags.h> + +struct __xchg_dummy { unsigned long a[100]; }; +#define __xg(x) ((struct __xchg_dummy *)(x)) + +static inline +unsigned long __xchg(volatile unsigned long *m, unsigned long val) +{ + unsigned long retval; + unsigned long flags; + + local_irq_save(flags); + retval = *m; + *m = val; + local_irq_restore(flags); + return retval; +} + +#define xchg(ptr, v) \ + ((__typeof__(*(ptr))) __xchg((unsigned long *)(ptr), \ + (unsigned long)(v))) + +static inline unsigned long __cmpxchg(volatile unsigned long *m, + unsigned long old, unsigned long new) +{ + unsigned long retval; + unsigned long flags; + + local_irq_save(flags); + retval = *m; + if (retval == old) + *m = new; + local_irq_restore(flags); + return retval; +} + +#define cmpxchg(ptr, o, n) \ + ((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \ + (unsigned long)(o), \ + (unsigned long)(n))) + +#define __HAVE_ARCH_CMPXCHG 1 + +#include <asm-generic/cmpxchg-local.h> + +#endif /* _ASM_SCORE_CMPXCHG_H */ |