diff options
Diffstat (limited to 'include/asm-generic/system.h')
-rw-r--r-- | include/asm-generic/system.h | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/include/asm-generic/system.h b/include/asm-generic/system.h index efa403b5e121..4b0b9cbbfae5 100644 --- a/include/asm-generic/system.h +++ b/include/asm-generic/system.h | |||
@@ -21,6 +21,7 @@ | |||
21 | #include <linux/irqflags.h> | 21 | #include <linux/irqflags.h> |
22 | 22 | ||
23 | #include <asm/cmpxchg-local.h> | 23 | #include <asm/cmpxchg-local.h> |
24 | #include <asm/cmpxchg.h> | ||
24 | 25 | ||
25 | struct task_struct; | 26 | struct task_struct; |
26 | 27 | ||
@@ -136,25 +137,6 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size) | |||
136 | #define xchg(ptr, x) \ | 137 | #define xchg(ptr, x) \ |
137 | ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) | 138 | ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) |
138 | 139 | ||
139 | static inline unsigned long __cmpxchg(volatile unsigned long *m, | ||
140 | unsigned long old, unsigned long new) | ||
141 | { | ||
142 | unsigned long retval; | ||
143 | unsigned long flags; | ||
144 | |||
145 | local_irq_save(flags); | ||
146 | retval = *m; | ||
147 | if (retval == old) | ||
148 | *m = new; | ||
149 | local_irq_restore(flags); | ||
150 | return retval; | ||
151 | } | ||
152 | |||
153 | #define cmpxchg(ptr, o, n) \ | ||
154 | ((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \ | ||
155 | (unsigned long)(o), \ | ||
156 | (unsigned long)(n))) | ||
157 | |||
158 | #endif /* !__ASSEMBLY__ */ | 140 | #endif /* !__ASSEMBLY__ */ |
159 | 141 | ||
160 | #endif /* __KERNEL__ */ | 142 | #endif /* __KERNEL__ */ |