Commit 4f84f433 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

lockdep: Fix backtraces 



Truncate stupid -1 entries in backtraces.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1248096665.15751.8816.camel@twins>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bbfa2622

kernel/lockdep.c

+11 −1
Original line number Diff line number Diff line
@@ -367,11 +367,21 @@ static int save_trace(struct stack_trace *trace) 


	save_stack_trace(trace);



	/*

	 * Some daft arches put -1 at the end to indicate its a full trace.

	 *

	 * <rant> this is buggy anyway, since it takes a whole extra entry so a

	 * complete trace that maxes out the entries provided will be reported

	 * as incomplete, friggin useless </rant>

	 */

	if (trace->entries[trace->nr_entries-1] == ULONG_MAX)

		trace->nr_entries--;



	trace->max_entries = trace->nr_entries;



	nr_stack_trace_entries += trace->nr_entries;



	if (nr_stack_trace_entries == MAX_STACK_TRACE_ENTRIES) {

	if (nr_stack_trace_entries >= MAX_STACK_TRACE_ENTRIES-1) {

		if (!debug_locks_off_graph_unlock())

			return 0;