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authorPaul Mundt <lethal@linux-sh.org>2009-08-15 01:11:37 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-08-15 01:11:37 +0900
commit606b4c992f3b28f906100f1b6eb49059909d8da7 (patch)
tree921f604e14276a2b55286fcfa13797f61e6d4240
parentf9967e23c10f025d85bbf66a2a5f18f016890ccb (diff)
sh: stacktrace: Properly terminate the trace entry buffer.
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>
-rw-r--r--arch/sh/kernel/stacktrace.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/sh/kernel/stacktrace.c b/arch/sh/kernel/stacktrace.c
index a0f497bcbb4..c2e45c48409 100644
--- a/arch/sh/kernel/stacktrace.c
+++ b/arch/sh/kernel/stacktrace.c
@@ -62,6 +62,8 @@ void save_stack_trace(struct stack_trace *trace)
unsigned long *sp = (unsigned long *)current_stack_pointer;
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);
@@ -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;
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);