diff options
Diffstat (limited to 'include/asm-powerpc/synch.h')
-rw-r--r-- | include/asm-powerpc/synch.h | 23 |
1 files changed, 4 insertions, 19 deletions
diff --git a/include/asm-powerpc/synch.h b/include/asm-powerpc/synch.h index 794870ab8fd3..c90d9d9aae72 100644 --- a/include/asm-powerpc/synch.h +++ b/include/asm-powerpc/synch.h | |||
@@ -2,6 +2,8 @@ | |||
2 | #define _ASM_POWERPC_SYNCH_H | 2 | #define _ASM_POWERPC_SYNCH_H |
3 | #ifdef __KERNEL__ | 3 | #ifdef __KERNEL__ |
4 | 4 | ||
5 | #include <linux/stringify.h> | ||
6 | |||
5 | #ifdef __powerpc64__ | 7 | #ifdef __powerpc64__ |
6 | #define __SUBARCH_HAS_LWSYNC | 8 | #define __SUBARCH_HAS_LWSYNC |
7 | #endif | 9 | #endif |
@@ -12,20 +14,12 @@ | |||
12 | # define LWSYNC sync | 14 | # define LWSYNC sync |
13 | #endif | 15 | #endif |
14 | 16 | ||
15 | |||
16 | /* | ||
17 | * Arguably the bitops and *xchg operations don't imply any memory barrier | ||
18 | * or SMP ordering, but in fact a lot of drivers expect them to imply | ||
19 | * both, since they do on x86 cpus. | ||
20 | */ | ||
21 | #ifdef CONFIG_SMP | 17 | #ifdef CONFIG_SMP |
22 | #define EIEIO_ON_SMP "eieio\n" | ||
23 | #define ISYNC_ON_SMP "\n\tisync" | 18 | #define ISYNC_ON_SMP "\n\tisync" |
24 | #define SYNC_ON_SMP __stringify(LWSYNC) "\n" | 19 | #define LWSYNC_ON_SMP __stringify(LWSYNC) "\n" |
25 | #else | 20 | #else |
26 | #define EIEIO_ON_SMP | ||
27 | #define ISYNC_ON_SMP | 21 | #define ISYNC_ON_SMP |
28 | #define SYNC_ON_SMP | 22 | #define LWSYNC_ON_SMP |
29 | #endif | 23 | #endif |
30 | 24 | ||
31 | static inline void eieio(void) | 25 | static inline void eieio(void) |
@@ -38,14 +32,5 @@ static inline void isync(void) | |||
38 | __asm__ __volatile__ ("isync" : : : "memory"); | 32 | __asm__ __volatile__ ("isync" : : : "memory"); |
39 | } | 33 | } |
40 | 34 | ||
41 | #ifdef CONFIG_SMP | ||
42 | #define eieio_on_smp() eieio() | ||
43 | #define isync_on_smp() isync() | ||
44 | #else | ||
45 | #define eieio_on_smp() __asm__ __volatile__("": : :"memory") | ||
46 | #define isync_on_smp() __asm__ __volatile__("": : :"memory") | ||
47 | #endif | ||
48 | |||
49 | #endif /* __KERNEL__ */ | 35 | #endif /* __KERNEL__ */ |
50 | #endif /* _ASM_POWERPC_SYNCH_H */ | 36 | #endif /* _ASM_POWERPC_SYNCH_H */ |
51 | |||