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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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4
fs/btrfs/compression.c
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@@ -194,11 +194,9 @@ static int check_compressed_csum(struct btrfs_inode *inode,
for (i = 0; i < cb->nr_pages; i++) {
page = cb->compressed_pages[i];
crypto_shash_init(shash);
kaddr = kmap_atomic(page);
crypto_shash_update(shash, kaddr, PAGE_SIZE);
crypto_shash_digest(shash, kaddr, PAGE_SIZE, csum);
kunmap_atomic(kaddr);
crypto_shash_final(shash, (u8 *)&csum);
if (memcmp(&csum, cb_sum, csum_size)) {
btrfs_print_data_csum_error(inode, disk_start,