Commit 633fbe32 authored by Stefan Roesch's avatar Stefan Roesch Committed by Yifan Qiao
Browse files

mm: split off __bdi_set_min_ratio() function 

mainline inclusion
from mainline-v6.2-rc1
commit 8021fb32
category: feature
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAN96I

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8021fb3232f265b81c7e4e7aba15bc3a04ff1fd3

--------------------------------

This splits off the __bdi_set_min_ratio() function from the
bdi_set_min_ratio() function. The __bdi_set_min_ratio() function will
also be called from the bdi_set_min_bytes() function, which will be
introduced in the next patch.

Link: https://lkml.kernel.org/r/20221119005215.3052436-12-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>
Signed-off-by: default avatarYifan Qiao <qiaoyifan4@huawei.com>
parent 68a0b1c6

mm/page-writeback.c

+6 −1
Original line number Diff line number Diff line
@@ -718,7 +718,7 @@ static u64 bdi_get_bytes(unsigned int ratio) 
	return bytes;

}



int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio)

static int __bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio)

{

	unsigned int delta;

	int ret = 0;
@@ -764,6 +764,11 @@ static int __bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ra 
	return ret;

}



int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio)

{

	return __bdi_set_min_ratio(bdi, min_ratio * BDI_RATIO_SCALE);

}



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

{

	if (max_ratio > 100)