ext4: Initialize preallocation list_head's properly

When creating a new ext4_prealloc_space structure, we have to
initialize its list_head pointers before we add them to any prealloc
lists.  Otherwise, with list debug enabled, we will get list
corruption warnings.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c962d06..4415bee 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3693,6 +3693,8 @@ ext4_mb_new_inode_pa(struct ext4_allocation_context *ac)
        pa->pa_free = pa->pa_len;
        atomic_set(&pa->pa_count, 1);
        spin_lock_init(&pa->pa_lock);
+       INIT_LIST_HEAD(&pa->pa_inode_list);
+       INIT_LIST_HEAD(&pa->pa_group_list);
        pa->pa_deleted = 0;
        pa->pa_linear = 0;
 
@@ -3755,6 +3757,7 @@ ext4_mb_new_group_pa(struct ext4_allocation_context *ac)
        atomic_set(&pa->pa_count, 1);
        spin_lock_init(&pa->pa_lock);
        INIT_LIST_HEAD(&pa->pa_inode_list);
+       INIT_LIST_HEAD(&pa->pa_group_list);
        pa->pa_deleted = 0;
        pa->pa_linear = 1;