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authorKeith Owens <kaos@ocs.com.au>2006-08-30 19:37:19 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-30 16:05:16 -0700
commit01ebb77b31149d847726a8847ad0d37631d7f049 (patch)
treea91d01f8c17d24041a4f2015e093ddfbd9defa1e /arch/x86_64/kernel/init_task.c
parent386dcafaacd212ef4a8aeed67a7db3ffbb44c7b2 (diff)
downloadlinux-2.6.34-ux500-01ebb77b31149d847726a8847ad0d37631d7f049.tar.gz
[PATCH] x86_64: Save original IST values for checking stack addresses
The values in init_tss.ist[] can change when an IST event occurs. Save the original IST values for checking stack addresses when debugging or doing stack traces. Signed-off-by: Keith Owens <kaos@ocs.com.au> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/init_task.c')
-rw-r--r--arch/x86_64/kernel/init_task.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/init_task.c b/arch/x86_64/kernel/init_task.c
index ce31d904d60..3dc5854ba21 100644
--- a/arch/x86_64/kernel/init_task.c
+++ b/arch/x86_64/kernel/init_task.c
@@ -46,4 +46,9 @@ EXPORT_SYMBOL(init_task);
*/
DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS;
+/* Copies of the original ist values from the tss are only accessed during
+ * debugging, no special alignment required.
+ */
+DEFINE_PER_CPU(struct orig_ist, orig_ist);
+
#define ALIGN_TO_4K __attribute__((section(".data.init_task")))