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| author | Vlastimil Babka <vbabka@suse.cz> | 2022-02-04 17:44:40 +0100 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2022-04-06 10:57:38 +0200 |
| commit | 0cd1a02901858049d14b5b9d4c5c680b012c8cc1 (patch) | |
| tree | 164f4beeb9e22b9b6126c6c36496da6e3d4c90d5 /mm/slub.c | |
| parent | a5f1783be29adae15666fd803efd7d2979130869 (diff) | |
| download | linux-0cd1a02901858049d14b5b9d4c5c680b012c8cc1.tar.bz2 | |
mm/slub: move struct track init out of set_track()
set_track() either zeroes out the struct track or fills it, depending on
the addr parameter. This is unnecessary as there's only one place that
calls it for the initialization - init_tracking(). We can simply do the
zeroing there, with a single memset() that covers both TRACK_ALLOC and
TRACK_FREE as they are adjacent.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-and-tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/mm/slub.c b/mm/slub.c index 74d92aa4a3a2..cd4fd0159911 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -729,34 +729,32 @@ static void set_track(struct kmem_cache *s, void *object, { struct track *p = get_track(s, object, alloc); - if (addr) { #ifdef CONFIG_STACKTRACE - unsigned int nr_entries; + unsigned int nr_entries; - metadata_access_enable(); - nr_entries = stack_trace_save(kasan_reset_tag(p->addrs), - TRACK_ADDRS_COUNT, 3); - metadata_access_disable(); + metadata_access_enable(); + nr_entries = stack_trace_save(kasan_reset_tag(p->addrs), + TRACK_ADDRS_COUNT, 3); + metadata_access_disable(); - if (nr_entries < TRACK_ADDRS_COUNT) - p->addrs[nr_entries] = 0; + if (nr_entries < TRACK_ADDRS_COUNT) + p->addrs[nr_entries] = 0; #endif - p->addr = addr; - p->cpu = smp_processor_id(); - p->pid = current->pid; - p->when = jiffies; - } else { - memset(p, 0, sizeof(struct track)); - } + p->addr = addr; + p->cpu = smp_processor_id(); + p->pid = current->pid; + p->when = jiffies; } static void init_tracking(struct kmem_cache *s, void *object) { + struct track *p; + if (!(s->flags & SLAB_STORE_USER)) return; - set_track(s, object, TRACK_FREE, 0UL); - set_track(s, object, TRACK_ALLOC, 0UL); + p = get_track(s, object, TRACK_ALLOC); + memset(p, 0, 2*sizeof(struct track)); } static void print_track(const char *s, struct track *t, unsigned long pr_time) |