no need for list_for_each_entry_safe()/resetting with superblock list

[firefly-linux-kernel-4.4.55.git] / fs / dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index caf08574982fcf1bd1428d89962412e303fdc2be..9f2c13417969f564ef502ed3745a04d144419820 100644 (file)
--- 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);
 }