From: Heiko Carstens <[email protected]>
[S390] lockdep: show held locks when showing a stackdump
Follow i386/x86_64:
lockdep can be used to print held locks when printing a
backtrace. This can be useful when debugging things like
'scheduling while atomic' asserts.
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
---
arch/s390/kernel/traps.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletion(-)
diff -urpN linux-2.6/arch/s390/kernel/traps.c linux-2.6-patched/arch/s390/kernel/traps.c
--- linux-2.6/arch/s390/kernel/traps.c 2006-12-04 14:50:55.000000000 +0100
+++ linux-2.6-patched/arch/s390/kernel/traps.c 2006-12-04 14:50:57.000000000 +0100
@@ -129,7 +129,7 @@ __show_trace(unsigned long sp, unsigned
}
}
-void show_trace(struct task_struct *task, unsigned long * stack)
+void show_trace(struct task_struct *task, unsigned long *stack)
{
register unsigned long __r15 asm ("15");
unsigned long sp;
@@ -151,6 +151,9 @@ void show_trace(struct task_struct *task
__show_trace(sp, S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
printk("\n");
+ if (!task)
+ task = current;
+ debug_show_held_locks(task);
}
void show_stack(struct task_struct *task, unsigned long *sp)
-
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