Commit 2c7528d3 authored by Eric Biggers's avatar Eric Biggers
Browse files

btrfs: stop parsing crc32c driver name 



To determine whether the crc32c implementation is "fast", use
crc32_optimizations() instead of parsing the crypto_shash driver name.
This keeps the code working as intended after the driver name is changed
by the next commit.

Acked-by: default avatarDavid Sterba <dsterba@suse.com>
Link: https://lore.kernel.org/r/20250613183753.31864-2-ebiggers@kernel.org


Signed-off-by: default avatarEric Biggers <ebiggers@kernel.org>
parent 5b019bb2

fs/btrfs/disk-io.c

+2 −6
Original line number Diff line number Diff line
@@ -2028,14 +2028,10 @@ static int btrfs_init_csum_hash(struct btrfs_fs_info *fs_info, u16 csum_type) 


	fs_info->csum_shash = csum_shash;



	/*

	 * Check if the checksum implementation is a fast accelerated one.

	 * As-is this is a bit of a hack and should be replaced once the csum

	 * implementations provide that information themselves.

	 */

	/* Check if the checksum implementation is a fast accelerated one. */

	switch (csum_type) {

	case BTRFS_CSUM_TYPE_CRC32:

		if (!strstr(crypto_shash_driver_name(csum_shash), "generic"))

		if (crc32_optimizations() & CRC32C_OPTIMIZATION)

			set_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags);

		break;

	case BTRFS_CSUM_TYPE_XXHASH: