mm: ignore return value of ->readpages

We used to assign the return value to a variable, which we then ignored.
Remove the pretence of caring.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Chao Yu <yuchao0@huawei.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Gao Xiang <gaoxiang25@huawei.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Link: http://lkml.kernel.org/r/20200414150233.24495-4-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/readahead.c b/mm/readahead.c
index 41a5928..61b15b6 100644 (file)
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -113,17 +113,16 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages,
 
 EXPORT_SYMBOL(read_cache_pages);
 
-static int read_pages(struct address_space *mapping, struct file *filp,
+static void read_pages(struct address_space *mapping, struct file *filp,
                struct list_head *pages, unsigned int nr_pages, gfp_t gfp)
 {
        struct blk_plug plug;
        unsigned page_idx;
-       int ret;
 
        blk_start_plug(&plug);
 
        if (mapping->a_ops->readpages) {
-               ret = mapping->a_ops->readpages(filp, mapping, pages, nr_pages);
+               mapping->a_ops->readpages(filp, mapping, pages, nr_pages);
                /* Clean up the remaining pages */
                put_pages_list(pages);
                goto out;
@@ -136,12 +135,9 @@ static int read_pages(struct address_space *mapping, struct file *filp,
                        mapping->a_ops->readpage(filp, page);
                put_page(page);
        }
-       ret = 0;
 
 out:
        blk_finish_plug(&plug);
-
-       return ret;
 }
 
 /*