btrfs: use explicit initializer for seq_elem

Using {} as initializer for struct seq_elem does not properly initialize
the list_head member, but it currently works because it gets set through
btrfs_get_tree_mod_seq if 'seq' is 0.

Signed-off-by: David Sterba <dsterba@suse.cz>
(cherry picked from commit 3284da7b7b585e6e8e98f374a51d234d14c7a0a2)

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index f55721ff938544c1b73d0d8cb057a52dba5b7884..9de772ee0031707c59292ac7849520ef8d6e9e47 100644 (file)
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1206,7 +1206,7 @@ int btrfs_check_shared(struct btrfs_trans_handle *trans,
        struct ulist *roots = NULL;
        struct ulist_iterator uiter;
        struct ulist_node *node;
-       struct seq_list elem = {};
+       struct seq_list elem = SEQ_LIST_INIT(elem);
        int ret = 0;
 
        tmp = ulist_alloc(GFP_NOFS);
@@ -1610,7 +1610,7 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
        struct ulist *roots = NULL;
        struct ulist_node *ref_node = NULL;
        struct ulist_node *root_node = NULL;
-       struct seq_list tree_mod_seq_elem = {};
+       struct seq_list tree_mod_seq_elem = SEQ_LIST_INIT(tree_mod_seq_elem);
        struct ulist_iterator ref_uiter;
        struct ulist_iterator root_uiter;
 

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 2e0aeb5c5a2a913b185d8d48060bf24949f6272e..79685b6dfcd8a8d1485ab193eac08859871a6bc9 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1329,6 +1329,8 @@ struct seq_list {
        u64 seq;
 };
 
+#define SEQ_LIST_INIT(name)    { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
+
 enum btrfs_orphan_cleanup_state {
        ORPHAN_CLEANUP_STARTED  = 1,
        ORPHAN_CLEANUP_DONE     = 2,

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 6d12f15259e49d1807c8bef32e7aa808e6ac8360..02e219e8de7ac3acdc35f833caa20d4bb10c22c0 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3039,7 +3039,7 @@ out:
 static int check_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                     u64 disko)
 {
-       struct seq_list tree_mod_seq_elem = {};
+       struct seq_list tree_mod_seq_elem = SEQ_LIST_INIT(tree_mod_seq_elem);
        struct ulist *roots;
        struct ulist_iterator uiter;
        struct ulist_node *root_node = NULL;

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 50ee58614f720d8ac61fd2b4fd2741db37c38bd7..84731e6e33102fb128235d46eca8a58bb5e030ec 100644 (file)
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1845,7 +1845,7 @@ static int qgroup_shared_accounting(struct btrfs_trans_handle *trans,
        struct ulist *roots = NULL;
        struct ulist *qgroups, *tmp;
        struct btrfs_qgroup *qgroup;
-       struct seq_list elem = {};
+       struct seq_list elem = SEQ_LIST_INIT(elem);
        u64 seq;
        int old_roots = 0;
        int new_roots = 0;
@@ -1967,7 +1967,7 @@ static int qgroup_subtree_accounting(struct btrfs_trans_handle *trans,
        int err;
        struct btrfs_qgroup *qg;
        u64 root_obj = 0;
-       struct seq_list elem = {};
+       struct seq_list elem = SEQ_LIST_INIT(elem);
 
        parents = ulist_alloc(GFP_NOFS);
        if (!parents)
@@ -2522,7 +2522,7 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 {
        struct btrfs_key found;
        struct ulist *roots = NULL;
-       struct seq_list tree_mod_seq_elem = {};
+       struct seq_list tree_mod_seq_elem = SEQ_LIST_INIT(tree_mod_seq_elem);
        u64 num_bytes;
        u64 seq;
        int new_roots;