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writeback, cgroup: split out the functional part of inode_switch_wbs_work_fn()

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Split out the functional part of the inode_switch_wbs_work_fn() function
as inode_do switch_wbs() to reuse it later for switching inodes attached
to dying cgwbs.

This commit doesn't bring any functional changes.

Link: https://lkml.kernel.org/r/20210608230225.2078447-7-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Dennis Zhou <dennis@kernel.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Jan Kara <jack@suse.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roman Gushchin 2021-06-28 19:35:56 -07:00 committed by Linus Torvalds
parent f3b6a6df38
commit 72d4512e9c
1 changed files with 11 additions and 8 deletions
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19
fs/fs-writeback.c
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@ -351,15 +351,12 @@ static void bdi_up_write_wb_switch_rwsem(struct backing_dev_info *bdi)
up_write(&bdi->wb_switch_rwsem);
}
static void inode_switch_wbs_work_fn(struct work_struct *work)
static void inode_do_switch_wbs(struct inode *inode,
struct bdi_writeback *new_wb)
{
struct inode_switch_wbs_context *isw =
container_of(to_rcu_work(work), struct inode_switch_wbs_context, work);
struct inode *inode = isw->inode;
struct backing_dev_info *bdi = inode_to_bdi(inode);
struct address_space *mapping = inode->i_mapping;
struct bdi_writeback *old_wb = inode->i_wb;
struct bdi_writeback *new_wb = isw->new_wb;
XA_STATE(xas, &mapping->i_pages, 0);
struct page *page;
bool switched = false;
@ -470,11 +467,17 @@ skip_switch:
wb_wakeup(new_wb);
wb_put(old_wb);
}
wb_put(new_wb);
}
iput(inode);
static void inode_switch_wbs_work_fn(struct work_struct *work)
{
struct inode_switch_wbs_context *isw =
container_of(to_rcu_work(work), struct inode_switch_wbs_context, work);
inode_do_switch_wbs(isw->inode, isw->new_wb);
wb_put(isw->new_wb);
iput(isw->inode);
kfree(isw);
atomic_dec(&isw_nr_in_flight);
}