linux-kernel - [PATCH 10/26] lustre: Convert ll_get_user_pages() to use get_user_pages

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Message-Id: <1380724087-13927-11-git-send-email-jack@suse.cz>
Date:	Wed,  2 Oct 2013 16:27:51 +0200
From:	Jan Kara <jack@...e.cz>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	linux-mm@...ck.org, Jan Kara <jack@...e.cz>,
	Greg Kroah-Hartman <greg@...ah.com>,
	Peng Tao <tao.peng@....com>,
	Andreas Dilger <andreas.dilger@...el.com>,
	hpdd-discuss@...ts.01.org
Subject: [PATCH 10/26] lustre: Convert ll_get_user_pages() to use get_user_pages_fast()

CC: Greg Kroah-Hartman <greg@...ah.com>
CC: Peng Tao <tao.peng@....com>
CC: Andreas Dilger <andreas.dilger@...el.com>
CC: hpdd-discuss@...ts.01.org
Signed-off-by: Jan Kara <jack@...e.cz>
---
 drivers/staging/lustre/lustre/llite/rw26.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c
index 96c29ad2fc8c..7e3e0967993b 100644
--- a/drivers/staging/lustre/lustre/llite/rw26.c
+++ b/drivers/staging/lustre/lustre/llite/rw26.c
@@ -202,11 +202,8 @@ static inline int ll_get_user_pages(int rw, unsigned long user_addr,
 
 	OBD_ALLOC_LARGE(*pages, *max_pages * sizeof(**pages));
 	if (*pages) {
-		down_read(&current->mm->mmap_sem);
-		result = get_user_pages(current, current->mm, user_addr,
-					*max_pages, (rw == READ), 0, *pages,
-					NULL);
-		up_read(&current->mm->mmap_sem);
+		result = get_user_pages_fast(user_addr, *max_pages,
+					     (rw == READ), *pages);
 		if (unlikely(result <= 0))
 			OBD_FREE_LARGE(*pages, *max_pages * sizeof(**pages));
 	}
-- 
1.8.1.4

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