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authorJeremy Fitzhardinge <jeremy@goop.org>2010-10-06 15:52:29 -0700
committerH. Peter Anvin <hpa@linux.intel.com>2010-10-11 15:59:01 -0700
commit236260b90dd94516982ad67aa6f5449c4c37db7b (patch)
tree45fc2bc1053e41630f88a1a4c4757bba817f34e8 /mm/memblock.c
parent153db80f8cf74e8700cac96305b6c0b92918f17c (diff)
downloadlinux-236260b90dd94516982ad67aa6f5449c4c37db7b.tar.bz2
memblock: Allow memblock_init to be called early
The Xen setup code needs to call memblock_x86_reserve_range() very early, so allow it to initialize the memblock subsystem before doing so. The second memblock_init() is ignored. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> LKML-Reference: <4CACFDAD.3090900@goop.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index 9ad39690a2bd..ae8b06c828c7 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -752,6 +752,12 @@ void __init memblock_analyze(void)
void __init memblock_init(void)
{
+ static int init_done __initdata = 0;
+
+ if (init_done)
+ return;
+ init_done = 1;
+
/* Hookup the initial arrays */
memblock.memory.regions = memblock_memory_init_regions;
memblock.memory.max = INIT_MEMBLOCK_REGIONS;