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btrfs: stop parsing crc32c driver name

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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: David Sterba <dsterba@suse.com>
Link: https://lore.kernel.org/r/20250613183753.31864-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
This commit is contained in:
Eric Biggers
2025-06-13 11:37:52 -07:00
parent 5b019bb25f
commit 2c7528d36e
1 changed files with 2 additions and 6 deletions
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8
fs/btrfs/disk-io.c
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@@ -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: