slub: Disable interrupts in free_debug processing
We will be calling free_debug_processing with interrupts disabled
in some case when the later patches are applied. Some of the
functions called by free_debug_processing expect interrupts to be
off.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/mm/slub.c b/mm/slub.c
index ee70c09..08c57a0 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1040,6 +1040,10 @@
static noinline int free_debug_processing(struct kmem_cache *s,
struct page *page, void *object, unsigned long addr)
{
+ unsigned long flags;
+ int rc = 0;
+
+ local_irq_save(flags);
slab_lock(page);
if (!check_slab(s, page))
@@ -1056,7 +1060,7 @@
}
if (!check_object(s, page, object, SLUB_RED_ACTIVE))
- return 0;
+ goto out;
if (unlikely(s != page->slab)) {
if (!PageSlab(page)) {
@@ -1077,13 +1081,15 @@
set_track(s, object, TRACK_FREE, addr);
trace(s, page, object, 0);
init_object(s, object, SLUB_RED_INACTIVE);
+ rc = 1;
+out:
slab_unlock(page);
- return 1;
+ local_irq_restore(flags);
+ return rc;
fail:
slab_fix(s, "Object at 0x%p not freed", object);
- slab_unlock(page);
- return 0;
+ goto out;
}
static int __init setup_slub_debug(char *str)