linux-ext4 - [PATCH v7 07/24] mm: rename readahead loop variable to 'i'

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Message-Id: <20200219210103.32400-8-willy@infradead.org>
Date:   Wed, 19 Feb 2020 13:00:46 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     linux-fsdevel@...r.kernel.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.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, John Hubbard <jhubbard@...dia.com>,
        Dave Chinner <dchinner@...hat.com>
Subject: [PATCH v7 07/24] mm: rename readahead loop variable to 'i'

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

Change the type of page_idx to unsigned long, and rename it -- it's
just a loop counter, not a page index.

Suggested-by: John Hubbard <jhubbard@...dia.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Reviewed-by: Dave Chinner <dchinner@...hat.com>
---
 mm/readahead.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index 096cf9020648..8a25fc7e2bf2 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -163,7 +163,6 @@ void __do_page_cache_readahead(struct address_space *mapping,
 	struct page *page;
 	unsigned long end_index;	/* The last page we want to read */
 	LIST_HEAD(page_pool);
-	int page_idx;
 	loff_t isize = i_size_read(inode);
 	gfp_t gfp_mask = readahead_gfp_mask(mapping);
 	struct readahead_control rac = {
@@ -171,6 +170,7 @@ void __do_page_cache_readahead(struct address_space *mapping,
 		.file = filp,
 		._nr_pages = 0,
 	};
+	unsigned long i;
 
 	if (isize == 0)
 		return;
@@ -180,8 +180,8 @@ void __do_page_cache_readahead(struct address_space *mapping,
 	/*
 	 * Preallocate as many pages as we will need.
 	 */
-	for (page_idx = 0; page_idx < nr_to_read; page_idx++) {
-		pgoff_t page_offset = index + page_idx;
+	for (i = 0; i < nr_to_read; i++) {
+		pgoff_t page_offset = index + i;
 
 		if (page_offset > end_index)
 			break;
@@ -202,7 +202,7 @@ void __do_page_cache_readahead(struct address_space *mapping,
 			break;
 		page->index = page_offset;
 		list_add(&page->lru, &page_pool);
-		if (page_idx == nr_to_read - lookahead_size)
+		if (i == nr_to_read - lookahead_size)
 			SetPageReadahead(page);
 		rac._nr_pages++;
 	}
-- 
2.25.0