c/r: prctl: fix build error for no-MMU case
authorMark Salter <msalter@redhat.com>
Tue, 25 Sep 2012 00:17:38 +0000 (17:17 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 25 Sep 2012 15:59:21 +0000 (08:59 -0700)
commitbe8cfc4af15cf611dfeb66a1fb5df43d5f1e280a
treeb84efb3a6189633a5e3f1a210971f28a0d68dac4
parentb5bd6a0e5fa8c0376d9746c566fe3daaa51ec825
c/r: prctl: fix build error for no-MMU case

Commit 1ad75b9e1628 ("c/r: prctl: add minimal address test to
PR_SET_MM") added some address checking to prctl_set_mm() used by
checkpoint-restore.  This causes a build error for no-MMU systems:

   kernel/sys.c: In function 'prctl_set_mm':
   kernel/sys.c:1868:34: error: 'mmap_min_addr' undeclared (first use in this function)

The test for mmap_min_addr doesn't make a lot of sense for no-MMU code
as noted in commit 6e1415467614 ("NOMMU: Optimise away the
{dac_,}mmap_min_addr tests").

This patch defines mmap_min_addr as 0UL in the no-MMU case so that the
compiler will optimize away tests for "addr < mmap_min_addr".

Signed-off-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: <stable@vger.kernel.org> [3.6.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/security.h