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btrfs: use crypto_shash_digest() instead of open coding

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Use crypto_shash_digest() instead of crypto_shash_init() +
crypto_shash_update() + crypto_shash_final().  This is more efficient.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Eric Biggers
2020-04-30 23:51:59 -07:00
committed by David Sterba
parent 1ed802c972
commit fd08001f17
4 changed files with 10 additions and 18 deletions
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7
fs/btrfs/file-item.c
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@@ -601,13 +601,12 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
index = 0;
}
crypto_shash_init(shash);
data = kmap_atomic(bvec.bv_page);
crypto_shash_update(shash, data + bvec.bv_offset
crypto_shash_digest(shash, data + bvec.bv_offset
+ (i * fs_info->sectorsize),
fs_info->sectorsize);
fs_info->sectorsize,
sums->sums + index);
kunmap_atomic(data);
crypto_shash_final(shash, (char *)(sums->sums + index));
index += csum_size;
offset += fs_info->sectorsize;
this_sum_bytes += fs_info->sectorsize;