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| author | Rusty Russell <rusty@rustcorp.com.au> | 2013-03-18 06:52:19 +0400 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2013-03-20 07:30:42 +0400 |
| commit | 61d0b5a4b2777dcf5daef245e212b3c1fa8091ca (patch) | |
| tree | 647f8fd729d5400341e5701d0d1eb668aad97f89 /tools/virtio/asm/barrier.h | |
| parent | a9a0fef779074838230e04a322fd2bdc921f4f4f (diff) | |
| download | linux-61d0b5a4b2777dcf5daef245e212b3c1fa8091ca.tar.xz | |
tools/virtio: separate headers more.
This makes them a bit more like the kernel headers, so we can include more
real kernel headers in our tests.
In addition this means that we don't break tools/virtio with the next
patch.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'tools/virtio/asm/barrier.h')
| -rw-r--r-- | tools/virtio/asm/barrier.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/virtio/asm/barrier.h b/tools/virtio/asm/barrier.h new file mode 100644 index 000000000000..aff61e13306c --- /dev/null +++ b/tools/virtio/asm/barrier.h @@ -0,0 +1,14 @@ +#if defined(__i386__) || defined(__x86_64__) +#define barrier() asm volatile("" ::: "memory") +#define mb() __sync_synchronize() + +#define smp_mb() mb() +# define smp_rmb() barrier() +# define smp_wmb() barrier() +/* Weak barriers should be used. If not - it's a bug */ +# define rmb() abort() +# define wmb() abort() +#else +#error Please fill in barrier macros +#endif + |