dm: prefer kmap_local_page() instead of deprecated kmap_atomic()

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>

drivers/md/dm-crypt.c

@@ -532,9 +532,9 @@ static int crypt_iv_lmk_gen(struct crypt_config *cc, u8 *iv,
 
 	if (bio_data_dir(dmreq->ctx->bio_in) == WRITE) {
 		sg = crypt_get_sg_data(cc, dmreq->sg_in);
-		src = kmap_atomic(sg_page(sg));
+		src = kmap_local_page(sg_page(sg));
 		r = crypt_iv_lmk_one(cc, iv, dmreq, src + sg->offset);
-		kunmap_atomic(src);
+		kunmap_local(src);
 	} else
 		memset(iv, 0, cc->iv_size);
 
@@ -552,14 +552,14 @@ static int crypt_iv_lmk_post(struct crypt_config *cc, u8 *iv,
 		return 0;
 
 	sg = crypt_get_sg_data(cc, dmreq->sg_out);
-	dst = kmap_atomic(sg_page(sg));
+	dst = kmap_local_page(sg_page(sg));
 	r = crypt_iv_lmk_one(cc, iv, dmreq, dst + sg->offset);
 
 	/* Tweak the first block of plaintext sector */
 	if (!r)
 		crypto_xor(dst + sg->offset, iv, cc->iv_size);
 
-	kunmap_atomic(dst);
+	kunmap_local(dst);
 	return r;
 }
 
@@ -682,9 +682,9 @@ static int crypt_iv_tcw_gen(struct crypt_config *cc, u8 *iv,
 	/* Remove whitening from ciphertext */
 	if (bio_data_dir(dmreq->ctx->bio_in) != WRITE) {
 		sg = crypt_get_sg_data(cc, dmreq->sg_in);
-		src = kmap_atomic(sg_page(sg));
+		src = kmap_local_page(sg_page(sg));
 		r = crypt_iv_tcw_whitening(cc, dmreq, src + sg->offset);
-		kunmap_atomic(src);
+		kunmap_local(src);
 	}
 
 	/* Calculate IV */
@@ -708,9 +708,9 @@ static int crypt_iv_tcw_post(struct crypt_config *cc, u8 *iv,
 
 	/* Apply whitening on ciphertext */
 	sg = crypt_get_sg_data(cc, dmreq->sg_out);
-	dst = kmap_atomic(sg_page(sg));
+	dst = kmap_local_page(sg_page(sg));
 	r = crypt_iv_tcw_whitening(cc, dmreq, dst + sg->offset);
-	kunmap_atomic(dst);
+	kunmap_local(dst);
 
 	return r;
 }
@@ -975,15 +975,15 @@ static int crypt_iv_elephant(struct crypt_config *cc, struct dm_crypt_request *d
 		goto out;
 
 	sg = crypt_get_sg_data(cc, dmreq->sg_out);
-	data = kmap_atomic(sg_page(sg));
+	data = kmap_local_page(sg_page(sg));
 	data_offset = data + sg->offset;
 
 	/* Cannot modify original bio, copy to sg_out and apply Elephant to it */
 	if (bio_data_dir(dmreq->ctx->bio_in) == WRITE) {
 		sg2 = crypt_get_sg_data(cc, dmreq->sg_in);
-		data2 = kmap_atomic(sg_page(sg2));
+		data2 = kmap_local_page(sg_page(sg2));
 		memcpy(data_offset, data2 + sg2->offset, cc->sector_size);
-		kunmap_atomic(data2);
+		kunmap_local(data2);
 	}
 
 	if (bio_data_dir(dmreq->ctx->bio_in) != WRITE) {
@@ -1003,7 +1003,7 @@ static int crypt_iv_elephant(struct crypt_config *cc, struct dm_crypt_request *d
 		diffuser_cpu_to_disk((__le32*)data_offset, cc->sector_size / sizeof(u32));
 	}
 
-	kunmap_atomic(data);
+	kunmap_local(data);
 out:
 	kfree_sensitive(ks);
 	kfree_sensitive(es);

drivers/md/dm-log-writes.c

@@ -232,13 +232,13 @@ static int write_metadata(struct log_writes_c *lc, void *entry,
 		goto error;
 	}
 
-	ptr = kmap_atomic(page);
+	ptr = kmap_local_page(page);
 	memcpy(ptr, entry, entrylen);
 	if (datalen)
 		memcpy(ptr + entrylen, data, datalen);
 	memset(ptr + entrylen + datalen, 0,
 	       lc->sectorsize - entrylen - datalen);
-	kunmap_atomic(ptr);
+	kunmap_local(ptr);
 
 	ret = bio_add_page(bio, page, lc->sectorsize, 0);
 	if (ret != lc->sectorsize) {
@@ -287,11 +287,11 @@ static int write_inline_data(struct log_writes_c *lc, void *entry,
 				goto error_bio;
 			}
 
-			ptr = kmap_atomic(page);
+			ptr = kmap_local_page(page);
 			memcpy(ptr, data, pg_datalen);
 			if (pg_sectorlen > pg_datalen)
 				memset(ptr + pg_datalen, 0, pg_sectorlen - pg_datalen);
-			kunmap_atomic(ptr);
+			kunmap_local(ptr);
 
 			ret = bio_add_page(bio, page, pg_sectorlen, 0);
 			if (ret != pg_sectorlen) {
@@ -743,9 +743,9 @@ static int log_writes_map(struct dm_target *ti, struct bio *bio)
 			return DM_MAPIO_KILL;
 		}
 
-		dst = kmap_atomic(page);
+		dst = kmap_local_page(page);
 		memcpy_from_bvec(dst, &bv);
-		kunmap_atomic(dst);
+		kunmap_local(dst);
 		block->vecs[i].bv_page = page;
 		block->vecs[i].bv_len = bv.bv_len;
 		block->vec_cnt++;