writeback: make writeback_in_progress() take bdi_writeback instead of backing_dev_info
writeback_in_progress() currently takes @bdi and returns whether
writeback is in progress on its root wb (bdi_writeback). In
preparation for cgroup writeback support, make it take wb instead.
While at it, make it an inline function.
This patch doesn't make any functional difference.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 79f11af..45baf6c 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -65,19 +65,6 @@
*/
unsigned int dirtytime_expire_interval = 12 * 60 * 60;
-/**
- * writeback_in_progress - determine whether there is writeback in progress
- * @bdi: the device's backing_dev_info structure.
- *
- * Determine whether there is writeback waiting to be handled against a
- * backing device.
- */
-int writeback_in_progress(struct backing_dev_info *bdi)
-{
- return test_bit(WB_writeback_running, &bdi->wb.state);
-}
-EXPORT_SYMBOL(writeback_in_progress);
-
static inline struct inode *wb_inode(struct list_head *head)
{
return list_entry(head, struct inode, i_wb_list);
@@ -1532,7 +1519,7 @@
unsigned long nr,
enum wb_reason reason)
{
- if (writeback_in_progress(sb->s_bdi))
+ if (writeback_in_progress(&sb->s_bdi->wb))
return 1;
if (!down_read_trylock(&sb->s_umount))