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authorKeith Owens <kaos@ocs.com.au>2006-08-30 13:37:19 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-30 19:05:16 -0400
commit01ebb77b31149d847726a8847ad0d37631d7f049 (patch)
treea91d01f8c17d24041a4f2015e093ddfbd9defa1e /arch/x86_64/kernel/setup64.c
parent386dcafaacd212ef4a8aeed67a7db3ffbb44c7b2 (diff)
[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/setup64.c')
-rw-r--r--arch/x86_64/kernel/setup64.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c
index 6fe58a634b5f..417de564456e 100644
--- a/arch/x86_64/kernel/setup64.c
+++ b/arch/x86_64/kernel/setup64.c
@@ -189,6 +189,7 @@ void __cpuinit cpu_init (void)
189{ 189{
190 int cpu = stack_smp_processor_id(); 190 int cpu = stack_smp_processor_id();
191 struct tss_struct *t = &per_cpu(init_tss, cpu); 191 struct tss_struct *t = &per_cpu(init_tss, cpu);
192 struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
192 unsigned long v; 193 unsigned long v;
193 char *estacks = NULL; 194 char *estacks = NULL;
194 struct task_struct *me; 195 struct task_struct *me;
@@ -256,7 +257,7 @@ void __cpuinit cpu_init (void)
256 estacks += EXCEPTION_STKSZ; 257 estacks += EXCEPTION_STKSZ;
257 break; 258 break;
258 } 259 }
259 t->ist[v] = (unsigned long)estacks; 260 orig_ist->ist[v] = t->ist[v] = (unsigned long)estacks;
260 } 261 }
261 262
262 t->io_bitmap_base = offsetof(struct tss_struct, io_bitmap); 263 t->io_bitmap_base = offsetof(struct tss_struct, io_bitmap);