[v6,06/19] mm: rename readahead loop variable to 'i'
diff mbox series

Message ID 20200217184613.19668-10-willy@infradead.org
State New
Headers show
Series
  • Change readahead API
Related show

Commit Message

Matthew Wilcox Feb. 17, 2020, 6:45 p.m. UTC
From: "Matthew Wilcox (Oracle)" <willy@infradead.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@nvidia.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/readahead.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Dave Chinner Feb. 18, 2020, 5:33 a.m. UTC | #1
On Mon, Feb 17, 2020 at 10:45:50AM -0800, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <willy@infradead.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@nvidia.com>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> ---
>  mm/readahead.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Looks fine.

Reviewed-by: Dave Chinner <dchinner@redhat.com>
John Hubbard Feb. 18, 2020, 11:11 p.m. UTC | #2
On 2/17/20 10:45 AM, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <willy@infradead.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@nvidia.com>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> ---
>  mm/readahead.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 

Looks good,

    Reviewed-by: John Hubbard <jhubbard@nvidia.com>


thanks,

Patch
diff mbox series

diff --git a/mm/readahead.c b/mm/readahead.c
index 74791b96013f..bdc5759000d3 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -156,7 +156,7 @@  void __do_page_cache_readahead(struct address_space *mapping,
 	struct inode *inode = mapping->host;
 	unsigned long end_index;	/* The last page we want to read */
 	LIST_HEAD(page_pool);
-	int page_idx;
+	unsigned long i;
 	loff_t isize = i_size_read(inode);
 	gfp_t gfp_mask = readahead_gfp_mask(mapping);
 	struct readahead_control rac = {
@@ -174,7 +174,7 @@  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++) {
+	for (i = 0; i < nr_to_read; i++) {
 		struct page *page;
 
 		if (offset > end_index)
@@ -198,7 +198,7 @@  void __do_page_cache_readahead(struct address_space *mapping,
 			break;
 		page->index = 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++;
 		offset++;