linux-kernel - [PATCH] fuse: use release

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Message-Id: <E1OyQId-0004Q4-CT@pomaz-ex.szeredi.hu>
Date:	Wed, 22 Sep 2010 16:27:55 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org
Subject: [PATCH] fuse: use release_pages()

From: Miklos Szeredi <mszeredi@...e.cz>

Replace iterated page_cache_release() with release_pages(), which is
faster and shorter.

Needs release_pages() to be exported to modules.

Suggested-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
---
 fs/fuse/dev.c |    7 +------
 mm/swap.c     |    1 +
 2 files changed, 2 insertions(+), 6 deletions(-)

Index: linux-2.6/fs/fuse/dev.c
===================================================================
--- linux-2.6.orig/fs/fuse/dev.c	2010-09-22 16:14:36.000000000 +0200
+++ linux-2.6/fs/fuse/dev.c	2010-09-22 16:14:49.000000000 +0200
@@ -1336,12 +1336,7 @@ out_finish:
 
 static void fuse_retrieve_end(struct fuse_conn *fc, struct fuse_req *req)
 {
-	int i;
-
-	for (i = 0; i < req->num_pages; i++) {
-		struct page *page = req->pages[i];
-		page_cache_release(page);
-	}
+	release_pages(req->pages, req->num_pages, 0);
 }
 
 static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode,
Index: linux-2.6/mm/swap.c
===================================================================
--- linux-2.6.orig/mm/swap.c	2010-08-06 13:58:19.000000000 +0200
+++ linux-2.6/mm/swap.c	2010-09-22 16:15:55.000000000 +0200
@@ -378,6 +378,7 @@ void release_pages(struct page **pages,
 
 	pagevec_free(&pages_to_free);
 }
+EXPORT_SYMBOL(release_pages);
 
 /*
  * The pages which we're about to release may be in the deferred lru-addition
--
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