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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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