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Update barriers for x86/x86-64

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Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Jens Axboe
2019-01-16 09:04:02 -07:00
parent b93edf5b9e
commit 6110279661
1 changed files with 3 additions and 6 deletions
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9
src/barrier.h
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@@ -1,12 +1,9 @@
#ifndef LIBURING_BARRIER_H
#define LIBURING_BARRIER_H
#if defined(__x86_64)
#define read_barrier() __asm__ __volatile__("lfence":::"memory")
#define write_barrier() __asm__ __volatile__("sfence":::"memory")
#elif defined(__i386__)
#define read_barrier() __asm__ __volatile__("": : :"memory")
#define write_barrier() __asm__ __volatile__("": : :"memory")
#if defined(__x86_64) || defined(__i386__)
#define read_barrier() __asm__ __volatile__("":::"memory")
#define write_barrier() __asm__ __volatile__("":::"memory")
#else
/*
* Add arch appropriate definitions. Be safe and use full barriers for