linux-ext4 - [PATCH v9 03/25] mm: Ignore return value of ->readpages

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Message-Id: <20200320142231.2402-4-willy@infradead.org>
Date:   Fri, 20 Mar 2020 07:22:09 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-erofs@...ts.ozlabs.org, linux-ext4@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, cluster-devel@...hat.com,
        ocfs2-devel@....oracle.com, linux-xfs@...r.kernel.org,
        Christoph Hellwig <hch@....de>,
        Dave Chinner <dchinner@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        William Kucharski <william.kucharski@...cle.com>
Subject: [PATCH v9 03/25] mm: Ignore return value of ->readpages

From: "Matthew Wilcox (Oracle)" <willy@...radead.org>

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@...radead.org>
Reviewed-by: Christoph Hellwig <hch@....de>
Reviewed-by: Dave Chinner <dchinner@...hat.com>
Reviewed-by: John Hubbard <jhubbard@...dia.com>
Reviewed-by: William Kucharski <william.kucharski@...cle.com>
---
 mm/readahead.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index 41a592886da7..61b15b6b9e72 100644
--- 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;
 }
 
 /*
-- 
2.25.1