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Commit c6e30871 authored by Qinghuang Feng's avatar Qinghuang Feng Committed by Chris Mason
Browse files

Btrfs: simplify iteration codes 



Merge list_for_each* and list_entry to list_for_each_entry*

Signed-off-by: default avatarQinghuang Feng <qhfeng.kernel@gmail.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 57506d50

fs/btrfs/disk-io.c

+4 −11
Original line number Diff line number Diff line
@@ -1135,7 +1135,6 @@ static int btrfs_congested_fn(void *congested_data, int bdi_bits) 
{

	struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data;

	int ret = 0;

	struct list_head *cur;

	struct btrfs_device *device;

	struct backing_dev_info *bdi;

#if 0
@@ -1143,8 +1142,7 @@ static int btrfs_congested_fn(void *congested_data, int bdi_bits) 
	    btrfs_congested_async(info, 0))

		return 1;

#endif

	list_for_each(cur, &info->fs_devices->devices) {

		device = list_entry(cur, struct btrfs_device, dev_list);

	list_for_each_entry(device, &info->fs_devices->devices, dev_list) {

		if (!device->bdev)

			continue;

		bdi = blk_get_backing_dev_info(device->bdev);
@@ -1162,13 +1160,11 @@ static int btrfs_congested_fn(void *congested_data, int bdi_bits) 
 */

static void __unplug_io_fn(struct backing_dev_info *bdi, struct page *page)

{

	struct list_head *cur;

	struct btrfs_device *device;

	struct btrfs_fs_info *info;



	info = (struct btrfs_fs_info *)bdi->unplug_io_data;

	list_for_each(cur, &info->fs_devices->devices) {

		device = list_entry(cur, struct btrfs_device, dev_list);

	list_for_each_entry(device, &info->fs_devices->devices, dev_list) {

		if (!device->bdev)

			continue;
@@ -1994,7 +1990,6 @@ static int write_dev_supers(struct btrfs_device *device, 


int write_all_supers(struct btrfs_root *root, int max_mirrors)

{

	struct list_head *cur;

	struct list_head *head = &root->fs_info->fs_devices->devices;

	struct btrfs_device *dev;

	struct btrfs_super_block *sb;
@@ -2010,8 +2005,7 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors) 


	sb = &root->fs_info->super_for_commit;

	dev_item = &sb->dev_item;

	list_for_each(cur, head) {

		dev = list_entry(cur, struct btrfs_device, dev_list);

	list_for_each_entry(dev, head, dev_list) {

		if (!dev->bdev) {

			total_errors++;

			continue;
@@ -2044,8 +2038,7 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors) 
	}



	total_errors = 0;

	list_for_each(cur, head) {

		dev = list_entry(cur, struct btrfs_device, dev_list);

	list_for_each_entry(dev, head, dev_list) {

		if (!dev->bdev)

			continue;

		if (!dev->in_fs_metadata || !dev->writeable)

fs/btrfs/extent-tree.c

+2 −6
Original line number Diff line number Diff line
@@ -325,10 +325,8 @@ static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info, 
						  u64 flags)

{

	struct list_head *head = &info->space_info;

	struct list_head *cur;

	struct btrfs_space_info *found;

	list_for_each(cur, head) {

		found = list_entry(cur, struct btrfs_space_info, list);

	list_for_each_entry(found, head, list) {

		if (found->flags == flags)

			return found;

	}
@@ -3013,7 +3011,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, 
static void dump_space_info(struct btrfs_space_info *info, u64 bytes)

{

	struct btrfs_block_group_cache *cache;

	struct list_head *l;



	printk(KERN_INFO "space_info has %llu free, is %sfull\n",

	       (unsigned long long)(info->total_bytes - info->bytes_used -
@@ -3021,8 +3018,7 @@ static void dump_space_info(struct btrfs_space_info *info, u64 bytes) 
	       (info->full) ? "" : "not ");



	down_read(&info->groups_sem);

	list_for_each(l, &info->block_groups) {

		cache = list_entry(l, struct btrfs_block_group_cache, list);

	list_for_each_entry(cache, &info->block_groups, list) {

		spin_lock(&cache->lock);

		printk(KERN_INFO "block group %llu has %llu bytes, %llu used "

		       "%llu pinned %llu reserved\n",

fs/btrfs/inode.c

+2 −3
Original line number Diff line number Diff line
@@ -1323,12 +1323,11 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans, 
			     struct inode *inode, u64 file_offset,

			     struct list_head *list)

{

	struct list_head *cur;

	struct btrfs_ordered_sum *sum;



	btrfs_set_trans_block_group(trans, inode);

	list_for_each(cur, list) {

		sum = list_entry(cur, struct btrfs_ordered_sum, list);



	list_for_each_entry(sum, list, list) {

		btrfs_csum_file_blocks(trans,

		       BTRFS_I(inode)->root->fs_info->csum_root, sum);

	}

fs/btrfs/ordered-data.c

+1 −3
Original line number Diff line number Diff line
@@ -613,7 +613,6 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, 
	struct btrfs_sector_sum *sector_sums;

	struct btrfs_ordered_extent *ordered;

	struct btrfs_ordered_inode_tree *tree = &BTRFS_I(inode)->ordered_tree;

	struct list_head *cur;

	unsigned long num_sectors;

	unsigned long i;

	u32 sectorsize = BTRFS_I(inode)->root->sectorsize;
@@ -624,8 +623,7 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, 
		return 1;



	mutex_lock(&tree->mutex);

	list_for_each_prev(cur, &ordered->list) {

		ordered_sum = list_entry(cur, struct btrfs_ordered_sum, list);

	list_for_each_entry_reverse(ordered_sum, &ordered->list, list) {

		if (disk_bytenr >= ordered_sum->bytenr) {

			num_sectors = ordered_sum->len / sectorsize;

			sector_sums = ordered_sum->sums;

fs/btrfs/transaction.c

+1 −3
Original line number Diff line number Diff line
@@ -852,11 +852,9 @@ static noinline int create_pending_snapshots(struct btrfs_trans_handle *trans, 
{

	struct btrfs_pending_snapshot *pending;

	struct list_head *head = &trans->transaction->pending_snapshots;

	struct list_head *cur;

	int ret;



	list_for_each(cur, head) {

		pending = list_entry(cur, struct btrfs_pending_snapshot, list);

	list_for_each_entry(pending, head, list) {

		ret = create_pending_snapshot(trans, fs_info, pending);

		BUG_ON(ret);

	}