| Message ID | 55F96FFD.5040501@suse.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
--- a/fs/btrfs/hash.c +++ b/fs/btrfs/hash.c @@ -20,8 +20,12 @@ static struct crypto_shash *tfm; int __init btrfs_hash_init(void) { tfm = crypto_alloc_shash("crc32c", 0, 0); + if (IS_ERR(tfm)) + return PTR_ERR(tfm); - return PTR_ERR_OR_ZERO(tfm); + printk("BTRFS: using %s for crc32c\n", + crypto_tfm_alg_driver_name(crypto_shash_tfm(tfm))); + return 0; } void btrfs_hash_exit(void)
Since several architectures support hardware-accelerated crc32c calculation, it would be nice to confirm that btrfs is actually using it. We can see an elevated use count for the module, but it doesn't actually show who the users are. This patch simply prints the name of the driver after successfully initializing the shash. Signed-off-by: Jeff Mahoney <jeffm@suse.com> --- fs/btrfs/hash.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)