diff options
Diffstat (limited to 'include/asm-generic/cmpxchg.h')
| -rw-r--r-- | include/asm-generic/cmpxchg.h | 48 |
1 files changed, 27 insertions, 21 deletions
diff --git a/include/asm-generic/cmpxchg.h b/include/asm-generic/cmpxchg.h index 9a24510cd8c1..848de25fc4bf 100644 --- a/include/asm-generic/cmpxchg.h +++ b/include/asm-generic/cmpxchg.h @@ -14,16 +14,14 @@ #include <linux/types.h> #include <linux/irqflags.h> -#ifndef xchg - /* * This function doesn't exist, so you'll get a linker error if * something tries to do an invalidly-sized xchg(). */ -extern void __xchg_called_with_bad_pointer(void); +extern void __generic_xchg_called_with_bad_pointer(void); static inline -unsigned long __xchg(unsigned long x, volatile void *ptr, int size) +unsigned long __generic_xchg(unsigned long x, volatile void *ptr, int size) { unsigned long ret, flags; @@ -34,7 +32,7 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size) #else local_irq_save(flags); ret = *(volatile u8 *)ptr; - *(volatile u8 *)ptr = x; + *(volatile u8 *)ptr = (x & 0xffu); local_irq_restore(flags); return ret; #endif /* __xchg_u8 */ @@ -45,7 +43,7 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size) #else local_irq_save(flags); ret = *(volatile u16 *)ptr; - *(volatile u16 *)ptr = x; + *(volatile u16 *)ptr = (x & 0xffffu); local_irq_restore(flags); return ret; #endif /* __xchg_u16 */ @@ -56,7 +54,7 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size) #else local_irq_save(flags); ret = *(volatile u32 *)ptr; - *(volatile u32 *)ptr = x; + *(volatile u32 *)ptr = (x & 0xffffffffu); local_irq_restore(flags); return ret; #endif /* __xchg_u32 */ @@ -75,35 +73,43 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size) #endif /* CONFIG_64BIT */ default: - __xchg_called_with_bad_pointer(); + __generic_xchg_called_with_bad_pointer(); return x; } } -#define xchg(ptr, x) ({ \ - ((__typeof__(*(ptr))) \ - __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))); \ +#define generic_xchg(ptr, x) ({ \ + ((__typeof__(*(ptr))) \ + __generic_xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))); \ }) -#endif /* xchg */ - /* * Atomic compare and exchange. */ #include <asm-generic/cmpxchg-local.h> -#ifndef cmpxchg_local -#define cmpxchg_local(ptr, o, n) ({ \ - ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ - (unsigned long)(n), sizeof(*(ptr)))); \ +#define generic_cmpxchg_local(ptr, o, n) ({ \ + ((__typeof__(*(ptr)))__generic_cmpxchg_local((ptr), (unsigned long)(o), \ + (unsigned long)(n), sizeof(*(ptr)))); \ }) + +#define generic_cmpxchg64_local(ptr, o, n) \ + __generic_cmpxchg64_local((ptr), (o), (n)) + + +#ifndef arch_xchg +#define arch_xchg generic_xchg +#endif + +#ifndef arch_cmpxchg_local +#define arch_cmpxchg_local generic_cmpxchg_local #endif -#ifndef cmpxchg64_local -#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) +#ifndef arch_cmpxchg64_local +#define arch_cmpxchg64_local generic_cmpxchg64_local #endif -#define cmpxchg(ptr, o, n) cmpxchg_local((ptr), (o), (n)) -#define cmpxchg64(ptr, o, n) cmpxchg64_local((ptr), (o), (n)) +#define arch_cmpxchg arch_cmpxchg_local +#define arch_cmpxchg64 arch_cmpxchg64_local #endif /* __ASM_GENERIC_CMPXCHG_H */ |