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| author | Keith Owens <kaos@ocs.com.au> | 2006-08-30 19:37:19 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-30 16:05:16 -0700 |
| commit | 01ebb77b31149d847726a8847ad0d37631d7f049 (patch) | |
| tree | a91d01f8c17d24041a4f2015e093ddfbd9defa1e /arch/x86_64/kernel/init_task.c | |
| parent | 386dcafaacd212ef4a8aeed67a7db3ffbb44c7b2 (diff) | |
| download | blackbird-op-linux-01ebb77b31149d847726a8847ad0d37631d7f049.tar.gz blackbird-op-linux-01ebb77b31149d847726a8847ad0d37631d7f049.zip | |
[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.c | 5 |
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 ce31d904d601..3dc5854ba21e 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"))) |
