new helper: iterate_supers()

[mirror_ubuntu-zesty-kernel.git] / fs / buffer.c

diff --git a/fs/buffer.c b/fs/buffer.c
index ded29b0fdac3a0db8ee6be49f7a970e3a42dce6b..2914d9adfb5031416e5127c022762815c88f4ade 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -560,25 +560,17 @@ repeat:
        return err;
 }
 
-static void do_thaw_all(struct work_struct *work)
+static void do_thaw_one(struct super_block *sb, void *unused)
 {
-       struct super_block *sb, *n;
        char b[BDEVNAME_SIZE];
+       while (sb->s_bdev && !thaw_bdev(sb->s_bdev, sb))
+               printk(KERN_WARNING "Emergency Thaw on %s\n",
+                      bdevname(sb->s_bdev, b));
+}
 
-       spin_lock(&sb_lock);
-       list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
-               if (list_empty(&sb->s_instances))
-                       continue;
-               sb->s_count++;
-               spin_unlock(&sb_lock);
-               down_read(&sb->s_umount);
-               while (sb->s_bdev && !thaw_bdev(sb->s_bdev, sb))
-                       printk(KERN_WARNING "Emergency Thaw on %s\n",
-                              bdevname(sb->s_bdev, b));
-               up_read(&sb->s_umount);
-               spin_lock(&sb_lock);
-       }
-       spin_unlock(&sb_lock);
+static void do_thaw_all(struct work_struct *work)
+{
+       iterate_supers(do_thaw_one, NULL);
        kfree(work);
        printk(KERN_WARNING "Emergency Thaw complete\n");
 }