linux-kernel - [PATCH 1/1] mm/readahead.c: remove unused file_ra_state from count_history

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Message-Id: <1402424846-9652-1-git-send-email-fabf@skynet.be>
Date:	Tue, 10 Jun 2014 20:27:26 +0200
From:	Fabian Frederick <fabf@...net.be>
To:	linux-kernel@...r.kernel.org
Cc:	Fabian Frederick <fabf@...net.be>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Fengguang Wu <fengguang.wu@...el.com>
Subject: [PATCH 1/1] mm/readahead.c: remove unused file_ra_state from count_history_pages

count_history_pages does only call page_cache_prev_hole in rcu_lock
context using address_space mapping. There's no need to have file_ra_state
here.

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Fengguang Wu <fengguang.wu@...el.com>
Signed-off-by: Fabian Frederick <fabf@...net.be>
---
 mm/readahead.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index 0ca36a7..17b9172 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -326,7 +326,6 @@ static unsigned long get_next_ra_size(struct file_ra_state *ra,
  * 	- thrashing threshold in memory tight systems
  */
 static pgoff_t count_history_pages(struct address_space *mapping,
-				   struct file_ra_state *ra,
 				   pgoff_t offset, unsigned long max)
 {
 	pgoff_t head;
@@ -349,7 +348,7 @@ static int try_context_readahead(struct address_space *mapping,
 {
 	pgoff_t size;
 
-	size = count_history_pages(mapping, ra, offset, max);
+	size = count_history_pages(mapping, offset, max);
 
 	/*
 	 * not enough history pages:
-- 
1.8.4.5

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