s390: define __smp_xxx (82b44496) · Commits · 戴 / test

This defines __smp_xxx barriers for s390, for use by virtualization. Some smp_xxx barriers are removed as they are defined correctly by asm-generic/barriers.h Note: smp_mb, smp_rmb and smp_wmb are defined as full barriers unconditionally on this architecture. Signed-off-by:

Michael S. Tsirkin <mst@redhat.com> Acked-by:

Arnd Bergmann <arnd@arndb.de> Acked-by:

Martin Schwidefsky <schwidefsky@de.ibm.com> Acked-by:

Peter Zijlstra (Intel) <peterz@infradead.org>

arch/s390/include/asm/barrier.h

+9 −6

Original line number	Diff line number	Diff line
		@@ -26,18 +26,21 @@
		#define wmb() barrier()
		#define dma_rmb() mb()
		#define dma_wmb() mb()
		#define smp_mb() mb()
		#define smp_rmb() rmb()
		#define smp_wmb() wmb()

		#define smp_store_release(p, v) \
		#define __smp_mb() mb()
		#define __smp_rmb() rmb()
		#define __smp_wmb() wmb()
		#define smp_mb() __smp_mb()
		#define smp_rmb() __smp_rmb()
		#define smp_wmb() __smp_wmb()

		#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); \

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