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| author | Nikolay Borisov <nborisov@suse.com> | 2018-01-08 11:45:04 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-03-26 15:09:38 +0200 |
| commit | df91f56adce1fc131e05368a0ad0ea72afd9a79a (patch) | |
| tree | 2406ccfaa0fb50877c45d2cdca364a1f3c2f48c0 | |
| parent | 3e72ee8874f42ddbe72a090044f7c03740158183 (diff) | |
| download | linux-df91f56adce1fc131e05368a0ad0ea72afd9a79a.tar.gz linux-df91f56adce1fc131e05368a0ad0ea72afd9a79a.tar.bz2 linux-df91f56adce1fc131e05368a0ad0ea72afd9a79a.zip | |
libcrc32c: Add crc32c_impl function
This function returns a string with the currently in-use implementation
of the crc32c algorithm, i.e crc32c-generic (for unoptimised, generic
implementation) or crc32c-intel for the sse optimised version. This
will be used by btrfs.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
[ use crypto_shash_driver_name as suggested by Herbert ]
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | include/linux/crc32c.h | 1 | ||||
| -rw-r--r-- | lib/libcrc32c.c | 6 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/crc32c.h b/include/linux/crc32c.h index 357ae4611a45..bd21af828ff6 100644 --- a/include/linux/crc32c.h +++ b/include/linux/crc32c.h @@ -5,6 +5,7 @@ #include <linux/types.h> extern u32 crc32c(u32 crc, const void *address, unsigned int length); +extern const char *crc32c_impl(void); /* This macro exists for backwards-compatibility. */ #define crc32c_le crc32c diff --git a/lib/libcrc32c.c b/lib/libcrc32c.c index 9f79547d1b97..f0a2934605bf 100644 --- a/lib/libcrc32c.c +++ b/lib/libcrc32c.c @@ -71,6 +71,12 @@ static void __exit libcrc32c_mod_fini(void) crypto_free_shash(tfm); } +const char *crc32c_impl(void) +{ + return crypto_shash_driver_name(tfm); +} +EXPORT_SYMBOL(crc32c_impl); + module_init(libcrc32c_mod_init); module_exit(libcrc32c_mod_fini); |