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authorYinghai Lu <yinghai@kernel.org>2011-02-17 14:46:37 +0100
committerTejun Heo <tj@kernel.org>2011-02-17 15:03:43 +0100
commit2ca230baeb7c61864cab9b53e37a3da28a2ca7e5 (patch)
tree961a13fca73f866363f3da26506eb1c4455d9386 /arch/x86/mm/numa_64.c
parente23bba604433a202cd301a976454a90ea6b783ef (diff)
downloadlinux-2ca230baeb7c61864cab9b53e37a3da28a2ca7e5.tar.bz2
x86-64, NUMA: Don't call __pa() with invalid address in numa_reset_distance()
Do not call __pa(numa_distance) if it was not allocated before. Calling with invalid address triggers VIRTUAL_BUG_ON() in __phys_addr() if CONFIG_DEBUG_VIRTUAL. Also reported by Ingo. http://thread.gmane.org/gmane.linux.kernel/1101306/focus=1101785 - v2: Change to check existing path as tj requested. - tj: Description update. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm/numa_64.c')
-rw-r--r--arch/x86/mm/numa_64.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 8ce617735900..1bd6de4aa714 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -371,11 +371,13 @@ static void __init numa_reset_distance(void)
{
size_t size;
- size = numa_distance_cnt * sizeof(numa_distance[0]);
- memblock_x86_free_range(__pa(numa_distance),
- __pa(numa_distance) + size);
+ if (numa_distance_cnt) {
+ size = numa_distance_cnt * sizeof(numa_distance[0]);
+ memblock_x86_free_range(__pa(numa_distance),
+ __pa(numa_distance) + size);
+ numa_distance_cnt = 0;
+ }
numa_distance = NULL;
- numa_distance_cnt = 0;
}
/*