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ext4: remove unnecessary wbc parameter from ext4_bio_write_page 

ext4_bio_write_page does not need wbc parameter, since its parameter
io contains the io_wbc field. The io::io_wbc is initialized by
ext4_io_submit_init which is called in ext4_writepages and
ext4_writepage functions prior to ext4_bio_write_page.
Therefor, when ext4_bio_write_page is called, wbc info
has already been included in io parameter.

Signed-off-by: Lei Chen <lennychen@tencent.com>
Link: https://lore.kernel.org/r/1607669664-25656-1-git-send-email-lennychen@tencent.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Lei Chen 2020-12-11 14:54:24 +08:00 committed by Theodore Ts'o
parent 82ef1370b0
commit be993933d2
3 changed files with 3 additions and 4 deletions
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1
fs/ext4/ext4.h
View File

@ -3653,7 +3653,6 @@ extern void ext4_io_submit(struct ext4_io_submit *io);
extern int ext4_bio_write_page(struct ext4_io_submit *io,
struct page *page,
int len,
struct writeback_control *wbc,
bool keep_towrite);
extern struct ext4_io_end_vec *ext4_alloc_io_end_vec(ext4_io_end_t *io_end);
extern struct ext4_io_end_vec *ext4_last_io_end_vec(ext4_io_end_t *io_end);

4
fs/ext4/inode.c
View File

@ -2064,7 +2064,7 @@ static int ext4_writepage(struct page *page,
unlock_page(page);
return -ENOMEM;
}
ret = ext4_bio_write_page(&io_submit, page, len, wbc, keep_towrite);
ret = ext4_bio_write_page(&io_submit, page, len, keep_towrite);
ext4_io_submit(&io_submit);
/* Drop io_end reference we got from init */
ext4_put_io_end_defer(io_submit.io_end);
@ -2098,7 +2098,7 @@ static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page)
len = size & ~PAGE_MASK;
else
len = PAGE_SIZE;
err = ext4_bio_write_page(&mpd->io_submit, page, len, mpd->wbc, false);
err = ext4_bio_write_page(&mpd->io_submit, page, len, false);
if (!err)
mpd->wbc->nr_to_write--;
mpd->first_page++;

2
fs/ext4/page-io.c
View File

@ -435,7 +435,6 @@ submit_and_retry:
int ext4_bio_write_page(struct ext4_io_submit *io,
struct page *page,
int len,
struct writeback_control *wbc,
bool keep_towrite)
{
struct page *bounce_page = NULL;
@ -445,6 +444,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
int ret = 0;
int nr_submitted = 0;
int nr_to_submit = 0;
struct writeback_control *wbc = io->io_wbc;
BUG_ON(!PageLocked(page));
BUG_ON(PageWriteback(page));