Merge branch 'fix/misc' into topic/misc

1 files changed, 18 insertions, 0 deletions

diff --git a/fs/super.c b/fs/super.c
index 9674ab2c8718..8819e3a7ff20 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -54,7 +54,22 @@ static struct super_block *alloc_super(struct file_system_type *type)
                         s = NULL;
                         goto out;
                 }
+#ifdef CONFIG_SMP
+                s->s_files = alloc_percpu(struct list_head);
+                if (!s->s_files) {
+                        security_sb_free(s);
+                        kfree(s);
+                        s = NULL;
+                        goto out;
+                } else {
+                        int i;
+
+                        for_each_possible_cpu(i)
+                                INIT_LIST_HEAD(per_cpu_ptr(s->s_files, i));
+                }
+#else
                 INIT_LIST_HEAD(&s->s_files);
+#endif
                 INIT_LIST_HEAD(&s->s_instances);
                 INIT_HLIST_HEAD(&s->s_anon);
                 INIT_LIST_HEAD(&s->s_inodes);
@@ -108,6 +123,9 @@ out:
  */
 static inline void destroy_super(struct super_block *s)
 {
+#ifdef CONFIG_SMP
+        free_percpu(s->s_files);
+#endif
         security_sb_free(s);
         kfree(s->s_subtype);
         kfree(s->s_options);