linux-kernel - [PATCH] lguest: cleanup for map

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Message-ID: <4A79540D.6060207@cn.fujitsu.com>
Date:	Wed, 05 Aug 2009 17:42:37 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Rusty Russell <rusty@...tcorp.com.au>,
	Matias Zabaljauregui <zabaljauregui@...il.com>,
	Johannes Weiner <hannes@...urebad.de>,
	Atsushi SAKAI <sakaia@...fujitsu.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>, lguest@...abs.org
Subject: [PATCH] lguest: cleanup for map_switcher()

We can use alloc_page() instead of get_zeroed_page() and virt_to_page()

Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
---
 drivers/lguest/core.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c
index 1e2cb84..b639019 100644
--- a/drivers/lguest/core.c
+++ b/drivers/lguest/core.c
@@ -67,12 +67,11 @@ static __init int map_switcher(void)
 	 * so we make sure they're zeroed.
 	 */
 	for (i = 0; i < TOTAL_SWITCHER_PAGES; i++) {
-		unsigned long addr = get_zeroed_page(GFP_KERNEL);
-		if (!addr) {
+		switcher_page[i] = alloc_page(GFP_KERNEL|__GFP_ZERO);
+		if (!switcher_page[i])
 			err = -ENOMEM;
 			goto free_some_pages;
 		}
-		switcher_page[i] = virt_to_page(addr);
 	}
 
 	/*
-- 
1.6.1.2

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