From: Paul Mundt Date: Fri, 14 Aug 2009 16:11:37 +0000 (+0900) Subject: sh: stacktrace: Properly terminate the trace entry buffer. X-Git-Tag: firefly_0821_release~12920^2~44^2~13 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=606b4c992f3b28f906100f1b6eb49059909d8da7;p=firefly-linux-kernel-4.4.55.git 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 --- diff --git a/arch/sh/kernel/stacktrace.c b/arch/sh/kernel/stacktrace.c index a0f497bcbb4f..c2e45c48409c 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);