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| Filename | /usr/src/linux-headers-3.13.0-24/arch/s390/include/asm/barrier.h |
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/*
* Copyright IBM Corp. 1999, 2009
*
* Author(s): Martin Schwidefsky <[email protected]>
*/
#ifndef __ASM_BARRIER_H
#define __ASM_BARRIER_H
/*
* Force strict CPU ordering.
* And yes, this is required on UP too when we're talking
* to devices.
*/
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
/* Fast-BCR without checkpoint synchronization */
#define mb() do { asm volatile("bcr 14,0" : : : "memory"); } while (0)
#else
#define mb() do { asm volatile("bcr 15,0" : : : "memory"); } while (0)
#endif
#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)
#endif /* __ASM_BARRIER_H */
* Copyright IBM Corp. 1999, 2009
*
* Author(s): Martin Schwidefsky <[email protected]>
*/
#ifndef __ASM_BARRIER_H
#define __ASM_BARRIER_H
/*
* Force strict CPU ordering.
* And yes, this is required on UP too when we're talking
* to devices.
*/
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
/* Fast-BCR without checkpoint synchronization */
#define mb() do { asm volatile("bcr 14,0" : : : "memory"); } while (0)
#else
#define mb() do { asm volatile("bcr 15,0" : : : "memory"); } while (0)
#endif
#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)
#endif /* __ASM_BARRIER_H */