From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de ([195.135.220.15]:46152 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756365AbeAHJpP (ORCPT ); Mon, 8 Jan 2018 04:45:15 -0500 From: Nikolay Borisov To: linux-btrfs@vger.kernel.org Cc: linux-kernel@vger.kernel.org, herbert@gondor.apana.org.au, Nikolay Borisov Subject: [PATCH 1/2] libcrc32c: Add crc32c_impl function Date: Mon, 8 Jan 2018 11:45:04 +0200 Message-Id: <1515404705-490-2-git-send-email-nborisov@suse.com> In-Reply-To: <1515404705-490-1-git-send-email-nborisov@suse.com> References: <1515404705-490-1-git-send-email-nborisov@suse.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: 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 --- 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 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); + module_init(libcrc32c_mod_init); module_exit(libcrc32c_mod_fini); -- 2.7.4