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vringh: use bvec_kmap_local

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Use the bvec_kmap_local helper rather than digging into the bvec
internals.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Message-Id: <20250501142244.2888227-1-hch@lst.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
This commit is contained in:
Christoph Hellwig
2025-05-01 09:22:30 -05:00
committed by Michael S. Tsirkin
parent 8b3f9967b1
commit 169294a14b
1 changed files with 6 additions and 8 deletions
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14
drivers/vhost/vringh.c
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@@ -1290,11 +1290,10 @@ static inline int getu16_iotlb(const struct vringh *vrh,
if (ret)
return ret;
} else {
void *kaddr = kmap_local_page(ivec.iov.bvec[0].bv_page);
void *from = kaddr + ivec.iov.bvec[0].bv_offset;
__virtio16 *from = bvec_kmap_local(&ivec.iov.bvec[0]);
tmp = READ_ONCE(*(__virtio16 *)from);
kunmap_local(kaddr);
tmp = READ_ONCE(*from);
kunmap_local(from);
}
*val = vringh16_to_cpu(vrh, tmp);
@@ -1329,11 +1328,10 @@ static inline int putu16_iotlb(const struct vringh *vrh,
if (ret)
return ret;
} else {
void *kaddr = kmap_local_page(ivec.iov.bvec[0].bv_page);
void *to = kaddr + ivec.iov.bvec[0].bv_offset;
__virtio16 *to = bvec_kmap_local(&ivec.iov.bvec[0]);
WRITE_ONCE(*(__virtio16 *)to, tmp);
kunmap_local(kaddr);
WRITE_ONCE(*to, tmp);
kunmap_local(to);
}
return 0;