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authorMinchan Kim <minchan@kernel.org>2012-08-01 03:43:50 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-01 05:42:45 +0400
commitee6f509c3274014d1f52e7a7a10aee9f85393c5e (patch)
treed8e5c816de0752b70b63f5de50ed52808ef3be9f /drivers
parent876aafbfd9ba5bb352f1b14622c27f3fe9a99013 (diff)
downloadlinux-ee6f509c3274014d1f52e7a7a10aee9f85393c5e.tar.xz
mm: factor out memory isolate functions
mm/page_alloc.c has some memory isolation functions but they are used only when we enable CONFIG_{CMA|MEMORY_HOTPLUG|MEMORY_FAILURE}. So let's make it configurable by new CONFIG_MEMORY_ISOLATION so that it can reduce binary size and we can check it simple by CONFIG_MEMORY_ISOLATION, not if defined CONFIG_{CMA|MEMORY_HOTPLUG|MEMORY_FAILURE}. Signed-off-by: Minchan Kim <minchan@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 9b21469482ae..08b4c5209384 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -196,6 +196,7 @@ config CMA
bool "Contiguous Memory Allocator (EXPERIMENTAL)"
depends on HAVE_DMA_CONTIGUOUS && HAVE_MEMBLOCK && EXPERIMENTAL
select MIGRATION
+ select MEMORY_ISOLATION
help
This enables the Contiguous Memory Allocator which allows drivers
to allocate big physically-contiguous blocks of memory for use with