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Subject[patch V3 07/29] mm/slub: Simplify stack trace retrieval
Replace the indirection through struct stack_trace with an invocation of
the storage array based interface.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: linux-mm@kvack.org
Cc: David Rientjes <rientjes@google.com>
---
mm/slub.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)

--- a/mm/slub.c
+++ b/mm/slub.c
@@ -552,18 +552,14 @@ static void set_track(struct kmem_cache

if (addr) {
#ifdef CONFIG_STACKTRACE
- struct stack_trace trace;
+ unsigned int nr_entries;

- trace.nr_entries = 0;
- trace.max_entries = TRACK_ADDRS_COUNT;
- trace.entries = p->addrs;
- trace.skip = 3;
metadata_access_enable();
- save_stack_trace(&trace);
+ nr_entries = stack_trace_save(p->addrs, TRACK_ADDRS_COUNT, 3);
metadata_access_disable();

- if (trace.nr_entries < TRACK_ADDRS_COUNT)
- p->addrs[trace.nr_entries] = 0;
+ if (nr_entries < TRACK_ADDRS_COUNT)
+ p->addrs[nr_entries] = 0;
#endif
p->addr = addr;
p->cpu = smp_processor_id();

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