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virtio_ring: sparse warning fixup 

virtio_store_mb was built with split ring in mind so it accepts
__virtio16 arguments. Packed ring uses __le16 values, so sparse
complains.  It's just a store with some barriers so let's convert it to
a macro, we don't loose too much type safety by doing that.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2020-07-10 06:46:04 -04:00
parent 8875bbba97
commit 5487196878
1 changed files with 9 additions and 10 deletions
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19
include/linux/virtio_ring.h
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@ -46,16 +46,15 @@ static inline void virtio_wmb(bool weak_barriers)
dma_wmb();
}
static inline void virtio_store_mb(bool weak_barriers,
__virtio16 *p, __virtio16 v)
{
if (weak_barriers) {
virt_store_mb(*p, v);
} else {
WRITE_ONCE(*p, v);
mb();
}
}
#define virtio_store_mb(weak_barriers, p, v) \
do { \
if (weak_barriers) { \
virt_store_mb(*p, v); \
} else { \
WRITE_ONCE(*p, v); \
mb(); \
} \
} while (0) \
struct virtio_device;
struct virtqueue;