linux-kernel - [PATCH 4.3 175/200] crypto: crc32c

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Date:	Sun, 14 Feb 2016 14:23:02 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Tim Chen <tim.c.chen@...ux.intel.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jean Delvare <jdelvare@...e.de>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH 4.3 175/200] crypto: crc32c - Fix crc32c soft dependency

4.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jean Delvare <jdelvare@...e.de>

commit fd7f6727102a1ccf6b4c1dfcc631f9b546526b26 upstream.

I don't think it makes sense for a module to have a soft dependency
on itself. This seems quite cyclic by nature and I can't see what
purpose it could serve.

OTOH libcrc32c calls crypto_alloc_shash("crc32c", 0, 0) so it pretty
much assumes that some incarnation of the "crc32c" hash algorithm has
been loaded. Therefore it makes sense to have the soft dependency
there (as crc-t10dif does.)

Cc: Tim Chen <tim.c.chen@...ux.intel.com>
Cc: "David S. Miller" <davem@...emloft.net>
Signed-off-by: Jean Delvare <jdelvare@...e.de>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 crypto/crc32c_generic.c |    1 -
 lib/libcrc32c.c         |    1 +
 2 files changed, 1 insertion(+), 1 deletion(-)

--- a/crypto/crc32c_generic.c
+++ b/crypto/crc32c_generic.c
@@ -172,4 +172,3 @@ MODULE_DESCRIPTION("CRC32c (Castagnoli)
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_CRYPTO("crc32c");
 MODULE_ALIAS_CRYPTO("crc32c-generic");
-MODULE_SOFTDEP("pre: crc32c");
--- a/lib/libcrc32c.c
+++ b/lib/libcrc32c.c
@@ -74,3 +74,4 @@ module_exit(libcrc32c_mod_fini);
 MODULE_AUTHOR("Clay Haapala <chaapala@...co.com>");
 MODULE_DESCRIPTION("CRC32c (Castagnoli) calculations");
 MODULE_LICENSE("GPL");
+MODULE_SOFTDEP("pre: crc32c");