From fd08001f17c7f0a5b19bf4026bbaace19d8fbdb6 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Thu, 30 Apr 2020 23:51:59 -0700 Subject: btrfs: use crypto_shash_digest() instead of open coding Use crypto_shash_digest() instead of crypto_shash_init() + crypto_shash_update() + crypto_shash_final(). This is more efficient. Signed-off-by: Eric Biggers Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/disk-io.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) (limited to 'fs/btrfs/disk-io.c') diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 8ad451695d49..714b57553ed6 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -358,16 +358,14 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); shash->tfm = fs_info->csum_shash; - crypto_shash_init(shash); /* * The super_block structure does not span the whole * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space is * filled with zeros and is included in the checksum. */ - crypto_shash_update(shash, raw_disk_sb + BTRFS_CSUM_SIZE, - BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); - crypto_shash_final(shash, result); + crypto_shash_digest(shash, raw_disk_sb + BTRFS_CSUM_SIZE, + BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE, result); if (memcmp(disk_sb->csum, result, btrfs_super_csum_size(disk_sb))) return 1; @@ -3504,10 +3502,9 @@ static int write_dev_supers(struct btrfs_device *device, btrfs_set_super_bytenr(sb, bytenr); - crypto_shash_init(shash); - crypto_shash_update(shash, (const char *)sb + BTRFS_CSUM_SIZE, - BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); - crypto_shash_final(shash, sb->csum); + crypto_shash_digest(shash, (const char *)sb + BTRFS_CSUM_SIZE, + BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE, + sb->csum); page = find_or_create_page(mapping, bytenr >> PAGE_SHIFT, GFP_NOFS); -- cgit v1.2.3