lockdep: Remove the ULONG_MAX stack trace hackery (2dfed456) · Commits · 戴 / test

No architecture terminates the stack trace with ULONG_MAX anymore. Remove the cruft. Signed-off-by:

Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Alexander Potapenko <glider@google.com> Cc: Will Deacon <will.deacon@arm.com> Link: https://lkml.kernel.org/r/20190410103644.485737321@linutronix.de

kernel/locking/lockdep.c

+0 −11

Original line number	Diff line number	Diff line
		@@ -444,17 +444,6 @@ 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->nr_entries != 0 &&
		trace->entries[trace->nr_entries-1] == ULONG_MAX)
		trace->nr_entries--;

		trace->max_entries = trace->nr_entries;

		nr_stack_trace_entries += trace->nr_entries;