FreeBSD compat layer: fixed bus_space_barrier for x86_64
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@ -231,7 +231,11 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t handle,
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bus_size_t offset, bus_size_t len, int flags)
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bus_size_t offset, bus_size_t len, int flags)
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{
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{
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if (flags & BUS_SPACE_BARRIER_READ)
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if (flags & BUS_SPACE_BARRIER_READ)
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#ifdef __x86_64__
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__asm__ __volatile__ ("lock; addl $0,0(%%rsp)" : : : "memory");
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#else
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__asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory");
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__asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory");
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#endif
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else
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else
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__asm__ __volatile__ ("" : : : "memory");
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__asm__ __volatile__ ("" : : : "memory");
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}
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}
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