no need for list_for_each_entry_safe()/resetting with superblock list

just delay __put_super() a bit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 7 insertions, 5 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index caf08574982f..9f2c13417969 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -536,7 +536,7 @@ restart:
  */
 static void prune_dcache(int count)
 {
-        struct super_block *sb, *n;
+        struct super_block *sb, *p = NULL;
         int w_count;
         int unused = dentry_stat.nr_unused;
         int prune_ratio;
@@ -550,7 +550,7 @@ static void prune_dcache(int count)
         else
                 prune_ratio = unused / count;
         spin_lock(&sb_lock);
-        list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
+        list_for_each_entry(sb, &super_blocks, s_list) {
                 if (list_empty(&sb->s_instances))
                         continue;
                 if (sb->s_nr_dentry_unused == 0)
@@ -590,14 +590,16 @@ static void prune_dcache(int count)
                         up_read(&sb->s_umount);
                 }
                 spin_lock(&sb_lock);
-                /* lock was dropped, must reset next */
-                list_safe_reset_next(sb, n, s_list);
+                if (p)
+                        __put_super(p);
                 count -= pruned;
-                __put_super(sb);
+                p = sb;
                 /* more work left to do? */
                 if (count <= 0)
                         break;
         }
+        if (p)
+                __put_super(p);
         spin_unlock(&sb_lock);
         spin_unlock(&dcache_lock);
 }