Leave superblocks on s_list until the end

[safe/jmp/linux-2.6] / fs / drop_caches.c

diff --git a/fs/drop_caches.c b/fs/drop_caches.c
index 31f4b0e..9cd4e4a 100644 (file)
--- a/fs/drop_caches.c
+++ b/fs/drop_caches.c
@@ -40,6 +40,8 @@ static void drop_pagecache(void)
        spin_lock(&sb_lock);
 restart:
        list_for_each_entry(sb, &super_blocks, s_list) {
+               if (list_empty(&sb->s_instances))
+                       continue;
                sb->s_count++;
                spin_unlock(&sb_lock);
                down_read(&sb->s_umount);