@@ -553,7 +553,6 @@ static void set_track(struct kmem_cache
if (addr) {
#ifdef CONFIG_STACKTRACE
struct stack_trace trace;
- int i;
trace.nr_entries = 0;
trace.max_entries = TRACK_ADDRS_COUNT;
@@ -563,20 +562,16 @@ static void set_track(struct kmem_cache
save_stack_trace(&trace);
metadata_access_disable();
- /* See rant in lockdep.c */
- if (trace.nr_entries != 0 &&
- trace.entries[trace.nr_entries - 1] == ULONG_MAX)
- trace.nr_entries--;
-
- for (i = trace.nr_entries; i < TRACK_ADDRS_COUNT; i++)
- p->addrs[i] = 0;
+ if (trace.nr_entries < TRACK_ADDRS_COUNT)
+ p->addrs[trace.nr_entries] = 0;
#endif
p->addr = addr;
p->cpu = smp_processor_id();
p->pid = current->pid;
p->when = jiffies;
- } else
+ } else {
memset(p, 0, sizeof(struct track));
+ }
}
static void init_tracking(struct kmem_cache *s, void *object)
No architecture terminates the stack trace with ULONG_MAX anymore. Remove the cruft. While at it remove the pointless loop of clearing the stack array completely. It's sufficient to clear the last entry as the consumers break out on the first zeroed entry anyway. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: linux-mm@kvack.org Cc: David Rientjes <rientjes@google.com> Cc: Christoph Lameter <cl@linux.com> --- mm/slub.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-)