block: use bvec_kmap_local in t10_pi_type1_{prepare,complete}
Using local kmaps slightly reduces the chances to stray writes, and the bvec interface cleans up the code a little bit. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20210727055646.118787-15-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -147,11 +147,10 @@ static void t10_pi_type1_prepare(struct request *rq)
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break;
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bip_for_each_vec(iv, bip, iter) {
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void *p, *pmap;
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unsigned int j;
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void *p;
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pmap = kmap_atomic(iv.bv_page);
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p = pmap + iv.bv_offset;
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p = bvec_kmap_local(&iv);
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for (j = 0; j < iv.bv_len; j += tuple_sz) {
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struct t10_pi_tuple *pi = p;
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@ -161,8 +160,7 @@ static void t10_pi_type1_prepare(struct request *rq)
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ref_tag++;
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p += tuple_sz;
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}
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kunmap_atomic(pmap);
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kunmap_local(p);
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}
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bip->bip_flags |= BIP_MAPPED_INTEGRITY;
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@ -195,11 +193,10 @@ static void t10_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
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struct bvec_iter iter;
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bip_for_each_vec(iv, bip, iter) {
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void *p, *pmap;
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unsigned int j;
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void *p;
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pmap = kmap_atomic(iv.bv_page);
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p = pmap + iv.bv_offset;
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p = bvec_kmap_local(&iv);
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for (j = 0; j < iv.bv_len && intervals; j += tuple_sz) {
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struct t10_pi_tuple *pi = p;
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@ -210,8 +207,7 @@ static void t10_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
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intervals--;
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p += tuple_sz;
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}
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kunmap_atomic(pmap);
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kunmap_local(p);
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}
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}
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}
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