btrfs: use list_for_each_entry* in backref.c
Use list_for_each_entry*() to simplify the code. Signed-off-by: Geliang Tang <geliangtang@163.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -520,13 +520,10 @@ static inline int ref_for_same_block(struct __prelim_ref *ref1,
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static int __add_missing_keys(struct btrfs_fs_info *fs_info,
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struct list_head *head)
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{
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struct list_head *pos;
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struct __prelim_ref *ref;
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struct extent_buffer *eb;
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list_for_each(pos, head) {
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struct __prelim_ref *ref;
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ref = list_entry(pos, struct __prelim_ref, list);
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list_for_each_entry(ref, head, list) {
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if (ref->parent)
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continue;
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if (ref->key_for_search.type)
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@ -563,23 +560,15 @@ static int __add_missing_keys(struct btrfs_fs_info *fs_info,
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*/
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static void __merge_refs(struct list_head *head, int mode)
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{
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struct list_head *pos1;
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struct __prelim_ref *ref1;
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list_for_each(pos1, head) {
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struct list_head *n2;
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struct list_head *pos2;
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struct __prelim_ref *ref1;
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list_for_each_entry(ref1, head, list) {
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struct __prelim_ref *ref2 = ref1, *tmp;
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ref1 = list_entry(pos1, struct __prelim_ref, list);
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for (pos2 = pos1->next, n2 = pos2->next; pos2 != head;
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pos2 = n2, n2 = pos2->next) {
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struct __prelim_ref *ref2;
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list_for_each_entry_safe_continue(ref2, tmp, head, list) {
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struct __prelim_ref *xchg;
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struct extent_inode_elem *eie;
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ref2 = list_entry(pos2, struct __prelim_ref, list);
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if (!ref_for_same_block(ref1, ref2))
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continue;
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if (mode == 1) {
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