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writeback: make writeback_in_progress() take bdi_writeback instead of backing_dev_info

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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>
This commit is contained in:
Tejun Heo 2015-05-22 17:13:53 -04:00 • committed by Jens Axboe
parent a06fd6b102
commit bc05873dcc
3 changed files with 14 additions and 17 deletions
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12
include/linux/backing-dev.h
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@ -156,7 +156,17 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio);
extern struct backing_dev_info noop_backing_dev_info;
int writeback_in_progress(struct backing_dev_info *bdi);
/**
* writeback_in_progress - determine whether there is writeback in progress
* @wb: bdi_writeback of interest
*
* Determine whether there is writeback waiting to be handled against a
* bdi_writeback.
*/
static inline bool writeback_in_progress(struct bdi_writeback *wb)
{
return test_bit(WB_writeback_running, &wb->state);
}
static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
{