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sparc: reuse asm-generic/barrier.h 

On sparc 64 bit dma_rmb, dma_wmb, smp_store_mb, smp_mb, smp_rmb,
smp_wmb, read_barrier_depends and smp_read_barrier_depends match the
asm-generic variants exactly. Drop the local definitions and pull in
asm-generic/barrier.h instead.

nop uses __asm__ __volatile but is otherwise identical to
the generic version, drop that as well.

This is in preparation to refactoring this code area.

Note: nop() was in processor.h and not in barrier.h as on other
architectures. Nothing seems to depend on it being there though.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Michael S. Tsirkin 2015-12-21 09:22:18 +02:00
parent 21535aaed9
commit 519be0438e
3 changed files with 2 additions and 23 deletions
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1
arch/sparc/include/asm/barrier_32.h
View File

@ -1,7 +1,6 @@
#ifndef __SPARC_BARRIER_H
#define __SPARC_BARRIER_H
#include <asm/processor.h> /* for nop() */
#include <asm-generic/barrier.h>
#endif /* !(__SPARC_BARRIER_H) */

21
arch/sparc/include/asm/barrier_64.h
View File

@ -37,25 +37,6 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
#define rmb() __asm__ __volatile__("":::"memory")
#define wmb() __asm__ __volatile__("":::"memory")
#define dma_rmb() rmb()
#define dma_wmb() wmb()
#define smp_store_mb(__var, __value) \
do { WRITE_ONCE(__var, __value); membar_safe("#StoreLoad"); } while(0)
#ifdef CONFIG_SMP
#define smp_mb() mb()
#define smp_rmb() rmb()
#define smp_wmb() wmb()
#else
#define smp_mb() __asm__ __volatile__("":::"memory")
#define smp_rmb() __asm__ __volatile__("":::"memory")
#define smp_wmb() __asm__ __volatile__("":::"memory")
#endif
#define read_barrier_depends() do { } while (0)
#define smp_read_barrier_depends() do { } while (0)
#define smp_store_release(p, v) \
do { \
compiletime_assert_atomic_type(*p); \
@ -74,4 +55,6 @@ do { \
#define smp_mb__before_atomic() barrier()
#define smp_mb__after_atomic() barrier()
#include <asm-generic/barrier.h>
#endif /* !(__SPARC64_BARRIER_H) */

3
arch/sparc/include/asm/processor.h
View File

@ -5,7 +5,4 @@
#else
#include <asm/processor_32.h>
#endif
#define nop() __asm__ __volatile__ ("nop")
#endif