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Subject[patch 094/114] ext4: Initialize preallocation list_heads properly

2.6.28-stable review patch. If anyone has any objections, please let us know.

------------------
From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

(cherry picked from commit d794bf8e0936dce45104565cd48c571061f4c1e3)

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
fs/ext4/mballoc.c | 3 +++
1 file changed, 3 insertions(+)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3690,6 +3690,8 @@ ext4_mb_new_inode_pa(struct ext4_allocat
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;

@@ -3748,6 +3750,7 @@ ext4_mb_new_group_pa(struct ext4_allocat
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;




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