The cifs readpage implementation was already synchronous, so use AOP_UPDATED_PAGE to avoid cycling the page lock. Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> --- fs/cifs/file.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/cifs/file.c b/fs/cifs/file.c index be46fab4c96d..533b151a9143 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -4537,7 +4537,8 @@ static int cifs_readpage_worker(struct file *file, struct page *page, /* send this page to the cache */ cifs_readpage_to_fscache(file_inode(file), page); - rc = 0; + kunmap(page); + return AOP_UPDATED_PAGE; io_error: kunmap(page); @@ -4677,7 +4678,10 @@ static int cifs_write_begin(struct file *file, struct address_space *mapping, * an error, we don't need to return it. cifs_write_end will * do a sync write instead since PG_uptodate isn't set. */ - cifs_readpage_worker(file, page, &page_start); + int err = cifs_readpage_worker(file, page, &page_start); + + if (err == AOP_UPDATED_PAGE) + goto out; put_page(page); oncethru = 1; goto start; -- 2.28.0
