lockdep: Remove the ULONG_MAX stack trace hackery

No architecture terminates the stack trace with ULONG_MAX anymore. Remove
the cruft.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-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

1 files changed, 0 insertions, 11 deletions

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index e16766ff184b..2edf9501d906 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -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;