1 files changed, 18 insertions, 2 deletions

diff --git a/mm/slub.c b/mm/slub.c
index 4996fc719552..da0ce55965dc 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1735,7 +1735,7 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
         }
         local_irq_restore(flags);
 
-        if (unlikely((gfpflags & __GFP_ZERO) && object))
+        if (unlikely(gfpflags & __GFP_ZERO) && object)
                 memset(object, 0, objsize);
 
         kmemcheck_slab_alloc(s, gfpflags, object, c->objsize);
@@ -4371,12 +4371,28 @@ static int show_stat(struct kmem_cache *s, char *buf, enum stat_item si)
         return len + sprintf(buf + len, "\n");
 }
 
+static void clear_stat(struct kmem_cache *s, enum stat_item si)
+{
+        int cpu;
+
+        for_each_online_cpu(cpu)
+                get_cpu_slab(s, cpu)->stat[si] = 0;
+}
+
 #define STAT_ATTR(si, text)                                     \
 static ssize_t text##_show(struct kmem_cache *s, char *buf)     \
 {                                                               \
         return show_stat(s, buf, si);                           \
 }                                                               \
-SLAB_ATTR_RO(text);                                             \
+static ssize_t text##_store(struct kmem_cache *s,               \
+                                const char *buf, size_t length) \
+{                                                               \
+        if (buf[0] != '0')                                      \
+                return -EINVAL;                                 \
+        clear_stat(s, si);                                      \
+        return length;                                          \
+}                                                               \
+SLAB_ATTR(text);                                                \
 
 STAT_ATTR(ALLOC_FASTPATH, alloc_fastpath);
 STAT_ATTR(ALLOC_SLOWPATH, alloc_slowpath);