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authorChristoph Hellwig <hch@lst.de>2021-10-12 08:31:53 +0200
committerDavid Sterba <dsterba@suse.com>2021-10-26 19:08:06 +0200
commit3dcfbcce1b8749a6e62be11c41a797c98ecc4127 (patch)
tree6f7b94f0041c191e783279beadb6ebdcca2d546f /fs/btrfs/file-item.c
parent11b66fa6eef3ecdcc7ae0e990b54b795a237a6e9 (diff)
btrfs: use bvec_kmap_local in btrfs_csum_one_bio
Using local kmaps slightly reduces the chances to stray writes, and the bvec interface cleans up the code a little bit. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/file-item.c')
-rw-r--r--fs/btrfs/file-item.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index ddb9c7ee796f..d1cbb64a78f3 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -708,12 +708,12 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
index = 0;
}
- data = kmap_atomic(bvec.bv_page);
- crypto_shash_digest(shash, data + bvec.bv_offset
- + (i * fs_info->sectorsize),
+ data = bvec_kmap_local(&bvec);
+ crypto_shash_digest(shash,
+ data + (i * fs_info->sectorsize),
fs_info->sectorsize,
sums->sums + index);
- kunmap_atomic(data);
+ kunmap_local(data);
index += fs_info->csum_size;
offset += fs_info->sectorsize;
this_sum_bytes += fs_info->sectorsize;