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ia64: define __smp_xxx

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This defines __smp_xxx barriers for ia64,
for use by virtualization.

smp_xxx barriers are removed as they are
defined correctly by asm-generic/barriers.h

This reduces the amount of arch-specific boiler-plate code.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Michael S. Tsirkin 2015-12-27 15:04:42 +02:00
parent 27f6cabc0e
commit eebd1b9278
1 changed files with 5 additions and 9 deletions
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14
arch/ia64/include/asm/barrier.h
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@ -42,28 +42,24 @@
#define dma_rmb() mb()
#define dma_wmb() mb()
#ifdef CONFIG_SMP
# define smp_mb() mb()
#else
# define smp_mb() barrier()
#endif
# define __smp_mb() mb()
#define smp_mb__before_atomic() barrier()
#define smp_mb__after_atomic() barrier()
#define __smp_mb__before_atomic() barrier()
#define __smp_mb__after_atomic() barrier()
/*
* IA64 GCC turns volatile stores into st.rel and volatile loads into ld.acq no
* need for asm trickery!
*/
#define smp_store_release(p, v) \
#define __smp_store_release(p, v) \
do { \
compiletime_assert_atomic_type(*p); \
barrier(); \
WRITE_ONCE(*p, v); \
} while (0)
#define smp_load_acquire(p) \
#define __smp_load_acquire(p) \
({ \
typeof(*p) ___p1 = READ_ONCE(*p); \
compiletime_assert_atomic_type(*p); \