mm: memcg: Correct unregistring of events attached to the same eventfd

[android-x86/kernel.git] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index 35f351f..0d0901e 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1818,6 +1818,11 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
        if (unlikely(!node_match(c, node)))
                goto another_slab;
 
+       /* must check again c->freelist in case of cpu migration or IRQ */
+       object = c->freelist;
+       if (object)
+               goto update_freelist;
+
        stat(s, ALLOC_REFILL);
 
 load_freelist:
@@ -1827,6 +1832,7 @@ load_freelist:
        if (kmem_cache_debug(s))
                goto debug;
 
+update_freelist:
        c->freelist = get_freepointer(s, object);
        page->inuse = page->objects;
        page->freelist = NULL;