linux-kernel - [PATCH 11/26] sep: Convert sep_lock_user_pages() to get_user_pages

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Message-Id: <1380724087-13927-12-git-send-email-jack@suse.cz>
Date:	Wed,  2 Oct 2013 16:27:52 +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 <gregkh@...uxfoundation.org>,
	Mark Allyn <mark.a.allyn@...el.com>,
	Jayant Mangalampalli <jayant.mangalampalli@...el.com>
Subject: [PATCH 11/26] sep: Convert sep_lock_user_pages() to get_user_pages_fast()

CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: Mark Allyn <mark.a.allyn@...el.com>
CC: Jayant Mangalampalli <jayant.mangalampalli@...el.com>
Signed-off-by: Jan Kara <jack@...e.cz>
---
 drivers/staging/sep/sep_main.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/sep/sep_main.c b/drivers/staging/sep/sep_main.c
index 6a98a208bbf2..11f5b2117457 100644
--- a/drivers/staging/sep/sep_main.c
+++ b/drivers/staging/sep/sep_main.c
@@ -1263,13 +1263,8 @@ static int sep_lock_user_pages(struct sep_device *sep,
 	}
 
 	/* Convert the application virtual address into a set of physical */
-	down_read(&current->mm->mmap_sem);
-	result = get_user_pages(current, current->mm, app_virt_addr,
-		num_pages,
-		((in_out_flag == SEP_DRIVER_IN_FLAG) ? 0 : 1),
-		0, page_array, NULL);
-
-	up_read(&current->mm->mmap_sem);
+	result = get_user_pages_fast(app_virt_addr, num_pages,
+		((in_out_flag == SEP_DRIVER_IN_FLAG) ? 0 : 1), page_array);
 
 	/* Check the number of pages locked - if not all then exit with error */
 	if (result != num_pages) {
-- 
1.8.1.4

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