sched: numa: Fix build error if CONFIG_NUMA_BALANCING && !CONFIG_TRANSPARENT_HUGEPAGE
authorMel Gorman <mgorman@suse.de>
Mon, 17 Dec 2012 14:05:53 +0000 (14:05 +0000)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 17 Dec 2012 16:25:50 +0000 (08:25 -0800)
commit221392c3ad0432e39fd74a349364f66cb0ed78f6
treecc47a75ade22ee1e32da36c67f3dea2bb9a42393
parenta4f1de176614f634c367e5994a7bcc428c940df0
sched: numa: Fix build error if CONFIG_NUMA_BALANCING && !CONFIG_TRANSPARENT_HUGEPAGE

Michal Hocko reported that the following build error occurs if
CONFIG_NUMA_BALANCING is set without THP support

  kernel/sched/fair.c: In function ‘task_numa_work’:
  kernel/sched/fair.c:932:55: error: call to ‘__build_bug_failed’ declared with attribute error: BUILD_BUG failed

The problem is that HPAGE_PMD_SHIFT triggers a BUILD_BUG() on
!CONFIG_TRANSPARENT_HUGEPAGE. This patch addresses the problem.

Reported-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/sched/fair.c