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sh: stacktrace: Properly terminate the trace entry buffer.

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This inserts a ULONG_MAX entry at the end of the valid entries in the
stack trace buffer so the default code doesn't need to scan to the end of
available slots. This also makes the trace buffer termination behaviour
consistent with the other architectures.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-08-15 01:11:37 +09:00
parent f9967e23c1
commit 606b4c992f
1 changed files with 4 additions and 0 deletions
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4
arch/sh/kernel/stacktrace.c
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@ -62,6 +62,8 @@ void save_stack_trace(struct stack_trace *trace)
unsigned long *sp = (unsigned long *)current_stack_pointer; unsigned long *sp = (unsigned long *)current_stack_pointer;
unwind_stack(current, NULL, sp, &save_stack_ops, trace); unwind_stack(current, NULL, sp, &save_stack_ops, trace);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
} }
EXPORT_SYMBOL_GPL(save_stack_trace); EXPORT_SYMBOL_GPL(save_stack_trace);
@ -97,5 +99,7 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
unsigned long *sp = (unsigned long *)tsk->thread.sp; unsigned long *sp = (unsigned long *)tsk->thread.sp;
unwind_stack(current, NULL, sp, &save_stack_ops_nosched, trace); unwind_stack(current, NULL, sp, &save_stack_ops_nosched, trace);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
} }
EXPORT_SYMBOL_GPL(save_stack_trace_tsk); EXPORT_SYMBOL_GPL(save_stack_trace_tsk);