kexec: crash: don't save swapper_pg_dir for !CONFIG_MMU configurations
authorWill Deacon <will.deacon@arm.com>
Wed, 28 Mar 2012 21:42:47 +0000 (14:42 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 29 Mar 2012 00:14:36 +0000 (17:14 -0700)
commitd034cfab4f7b9e768c5c1caaa56c5bd4805d2b92
treedd696a4873b3c6207d5818c91bbc92771f0e5d4d
parent7d7f98488b203cbf78538698cf5d937f670d96d3
kexec: crash: don't save swapper_pg_dir for !CONFIG_MMU configurations

nommu platforms don't have very interesting swapper_pg_dir pointers and
usually just #define them to NULL, meaning that we can't include them in
the vmcoreinfo on the kexec crash path.

This patch only saves the swapper_pg_dir if we have an MMU.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Simon Horman <horms@verge.net.au>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/kexec.c