On Fri, Feb 02, 2018 at 06:29:42PM +0100, David Sterba wrote: > Adding linux-crypto@xxxxxxxxxxxxxxx to CC > > Link to the 2/2 patch https://patchwork.kernel.org/patch/10149203/ > > On Mon, Jan 08, 2018 at 11:45:04AM +0200, Nikolay Borisov wrote: > > 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@xxxxxxxx> > > --- > > include/linux/crc32c.h | 1 + > > lib/libcrc32c.c | 6 ++++++ > > 2 files changed, 7 insertions(+) > > > > 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..eaf71e0e04be 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_tfm_alg_driver_name(crypto_shash_tfm(tfm)); > > +} > > +EXPORT_SYMBOL(crc32c_impl); You could just use crypto_shash_driver_name. > Crypto maintainers, would it be still possible to squeeze this patch to > 4.16? It's quite trivial, but as it is not in a code I maintain I'm not > comfortable to add it to my tree (unless I get an ACK). > > The linked patch depends on that change and would let us get rid of some > custom crypto wrappers around crc32c. I'm fine with the patch otherwise. Acked-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
