[4.2.y-ckt stable] Patch "lib: sw842: select crc32" has been added to the 4.2.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    lib: sw842: select crc32

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt3.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 8e322fbefb6aefbda4bcebbe0c68083e6dfb1822 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd at arndb.de>
Date: Wed, 13 Jan 2016 23:24:02 +0100
Subject: lib: sw842: select crc32

commit 5b57167749274961baf15ed1f05a4996b3ab0487 upstream.

The sw842 library code was merged in linux-4.1 and causes a very rare randconfig
failure when CONFIG_CRC32 is not set:

    lib/built-in.o: In function `sw842_compress':
    oid_registry.c:(.text+0x12ddc): undefined reference to `crc32_be'
    lib/built-in.o: In function `sw842_decompress':
    oid_registry.c:(.text+0x137e4): undefined reference to `crc32_be'

This adds an explict 'select CRC32' statement, similar to what the other users
of the crc32 code have. In practice, CRC32 is always enabled anyway because
over 100 other symbols select it.

Signed-off-by: Arnd Bergmann <arnd at arndb.de>
Fixes: 2da572c959dd ("lib: add software 842 compression/decompression")
Acked-by: Dan Streetman <ddstreet at ieee.org>
Signed-off-by: Herbert Xu <herbert at gondor.apana.org.au>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 lib/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Kconfig b/lib/Kconfig
index 3a2ef67..7ceb4ca 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -213,9 +213,11 @@ config RANDOM32_SELFTEST
 # compression support is select'ed if needed
 #
 config 842_COMPRESS
+	select CRC32
 	tristate

 config 842_DECOMPRESS
+	select CRC32
 	tristate

 config ZLIB_INFLATE
--
1.9.1