Commit efc3e6ad authored by Stefan Roesch's avatar Stefan Roesch Committed by Andrew Morton
Browse files

mm: split off __bdi_set_max_ratio() function 

This splits off __bdi_set_max_ratio() from bdi_set_max_ratio().
__bdi_set_max_ratio() will also be called from bdi_set_max_bytes(),
which will be introduced in the next patch.

Link: https://lkml.kernel.org/r/20221119005215.3052436-7-shr@devkernel.io


Signed-off-by: default avatarStefan Roesch <shr@devkernel.io>
Cc: Chris Mason <clm@meta.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 00df7d51

mm/page-writeback.c

+9 −5
Original line number Diff line number Diff line
@@ -692,14 +692,10 @@ int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio) 
	return ret;

}



int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned max_ratio)

static int __bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio)

{

	int ret = 0;



	if (max_ratio > 100)

		return -EINVAL;

	max_ratio *= BDI_RATIO_SCALE;



	spin_lock_bh(&bdi_lock);

	if (bdi->min_ratio > max_ratio) {

		ret = -EINVAL;
@@ -711,6 +707,14 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned max_ratio) 


	return ret;

}



int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio)

{

	if (max_ratio > 100)

		return -EINVAL;



	return __bdi_set_max_ratio(bdi, max_ratio * BDI_RATIO_SCALE);

}

EXPORT_SYMBOL(bdi_set_max_ratio);



u64 bdi_get_max_bytes(struct backing_dev_info *bdi)