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authorAaron Durbin <adurbin@google.com>2007-05-17 01:11:06 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-17 08:23:04 -0400
commitf363d16fbb9374c0bd7f2757d412c287169094c9 (patch)
treefc706493c5cca046934de190056756f7ce02422f /include/acpi/acpi_numa.h
parent0aa817f078b655d0ae36669169d73a5c8a388016 (diff)
acpi: fix potential call to a freed memory section.
Strip __cpuinit[data] from Node <-> PXM routines and supporting data structures. Also make pxm_to_node_map and node_to_pxm_map local to the numa acpi module. This fixes a bug triggered by the following conditions: - boot on a machine with a SLIT table defined - kernel is configured w/ CONFIG_HOTPLUG_CPU=n - cat /sys/devices/system/node/node*/distance This will cause an oops by calling into a freed memory section. In particular, on x86_64, __node_distance calls node_to_pxm(). Signed-off-by: Aaron Durbin <adurbin@google.com> Cc: Len Brown <lenb@kernel.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/acpi/acpi_numa.h')
-rw-r--r--include/acpi/acpi_numa.h7
1 files changed, 2 insertions, 5 deletions
diff --git a/include/acpi/acpi_numa.h b/include/acpi/acpi_numa.h
index f9d2bde9a7bb..b62cd36ff324 100644
--- a/include/acpi/acpi_numa.h
+++ b/include/acpi/acpi_numa.h
@@ -11,11 +11,8 @@
11#define MAX_PXM_DOMAINS (256) /* Old pxm spec is defined 8 bit */ 11#define MAX_PXM_DOMAINS (256) /* Old pxm spec is defined 8 bit */
12#endif 12#endif
13 13
14extern int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS]; 14extern int pxm_to_node(int);
15extern int __cpuinitdata node_to_pxm_map[MAX_NUMNODES]; 15extern int node_to_pxm(int);
16
17extern int __cpuinit pxm_to_node(int);
18extern int __cpuinit node_to_pxm(int);
19extern int __cpuinit acpi_map_pxm_to_node(int); 16extern int __cpuinit acpi_map_pxm_to_node(int);
20extern void __cpuinit acpi_unmap_pxm_to_node(int); 17extern void __cpuinit acpi_unmap_pxm_to_node(int);
21 18