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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-05-14 14:40:43 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-05-16 16:42:45 +0400 |
| commit | c6f48b0bbeba86f12847b16b1d4631363037f7f3 (patch) | |
| tree | 75dfcb152550743df4913fc18caa10d5e63cb33b /arch/s390 | |
| parent | 521674e4ffad2b2fc8c56cd79e4b2c07c074e9cb (diff) | |
| download | linux-c6f48b0bbeba86f12847b16b1d4631363037f7f3.tar.xz | |
s390/barrier: cleanup barrier functions
s390 really has no eieio instruction, so get rid of the implied ppc
semantics and in addition change mb() into a function.
Also remove SYNC_OTHER_CORES() since it is unused.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/barrier.h | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/arch/s390/include/asm/barrier.h b/arch/s390/include/asm/barrier.h index 451273ad4d34..6993b20d64fb 100644 --- a/arch/s390/include/asm/barrier.h +++ b/arch/s390/include/asm/barrier.h @@ -11,25 +11,23 @@ * Force strict CPU ordering. * And yes, this is required on UP too when we're talking * to devices. - * - * This is very similar to the ppc eieio/sync instruction in that is - * does a checkpoint syncronisation & makes sure that - * all memory ops have completed wrt other CPU's ( see 7-15 POP DJB ). */ -#define eieio() asm volatile("bcr 15,0" : : : "memory") -#define SYNC_OTHER_CORES(x) eieio() -#define mb() eieio() -#define rmb() eieio() -#define wmb() eieio() -#define read_barrier_depends() do { } while(0) -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() -#define smp_read_barrier_depends() read_barrier_depends() -#define smp_mb__before_clear_bit() smp_mb() -#define smp_mb__after_clear_bit() smp_mb() +static inline void mb(void) +{ + asm volatile("bcr 15,0" : : : "memory"); +} + +#define rmb() mb() +#define wmb() mb() +#define read_barrier_depends() do { } while(0) +#define smp_mb() mb() +#define smp_rmb() rmb() +#define smp_wmb() wmb() +#define smp_read_barrier_depends() read_barrier_depends() +#define smp_mb__before_clear_bit() smp_mb() +#define smp_mb__after_clear_bit() smp_mb() -#define set_mb(var, value) do { var = value; mb(); } while (0) +#define set_mb(var, value) do { var = value; mb(); } while (0) #endif /* __ASM_BARRIER_H */ |