btrfs: use btrfs_csum_data() instead of directly calling crc32c

btrfsic_test_for_metadata() directly calls the crc32c() library function
for calculating the CRC32C checksum, but then uses btrfs_csum_final() to
invert the result.

To ease further refactoring and development around checksumming in BTRFS
convert to calling btrfs_csum_data(), which is a wrapper around
crc32c().

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index b0c8094528d14d7de00b9942ae787be0f477580e..85774e2fa3e53a17f130c9d30445836cde91c3ef 100644 (file)
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -1728,7 +1728,7 @@ static int btrfsic_test_for_metadata(struct btrfsic_state *state,
                size_t sublen = i ? PAGE_SIZE :
                                    (PAGE_SIZE - BTRFS_CSUM_SIZE);
 
-               crc = crc32c(crc, data, sublen);
+               crc = btrfs_csum_data(data, crc, sublen);
        }
        btrfs_csum_final(crc, csum);
        if (memcmp(csum, h->csum, state->csum_size))