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Message-Id: <20200323202259.13363-10-willy@infradead.org>
Date: Mon, 23 Mar 2020 13:22:43 -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,
John Hubbard <jhubbard@...dia.com>,
Christoph Hellwig <hch@....de>,
William Kucharski <william.kucharski@...cle.com>
Subject: [PATCH v10 09/25] mm: Remove 'page_offset' from readahead loop
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
Replace the page_offset variable with 'index + i'.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Reviewed-by: John Hubbard <jhubbard@...dia.com>
Reviewed-by: Christoph Hellwig <hch@....de>
Reviewed-by: William Kucharski <william.kucharski@...cle.com>
---
mm/readahead.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/mm/readahead.c b/mm/readahead.c
index 7ce320854bad..ddc63d3b07b8 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -180,12 +180,10 @@ void __do_page_cache_readahead(struct address_space *mapping,
* Preallocate as many pages as we will need.
*/
for (i = 0; i < nr_to_read; i++) {
- pgoff_t page_offset = index + i;
-
- if (page_offset > end_index)
+ if (index + i > end_index)
break;
- page = xa_load(&mapping->i_pages, page_offset);
+ page = xa_load(&mapping->i_pages, index + i);
if (page && !xa_is_value(page)) {
/*
* Page already present? Kick off the current batch of
@@ -199,7 +197,7 @@ void __do_page_cache_readahead(struct address_space *mapping,
page = __page_cache_alloc(gfp_mask);
if (!page)
break;
- page->index = page_offset;
+ page->index = index + i;
list_add(&page->lru, &page_pool);
if (i == nr_to_read - lookahead_size)
SetPageReadahead(page);
--
2.25.1
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