netdev - [PATCH 07/12] RDS: use get_user_pages

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Date:	Thu,  9 Apr 2009 17:09:42 -0700
From:	Andy Grover <andy.grover@...cle.com>
To:	netdev@...r.kernel.org
Cc:	rds-devel@....oracle.com
Subject: [PATCH 07/12] RDS: use get_user_pages_fast()

Use the new function that is simpler and faster.

Signed-off-by: Andy Grover <andy.grover@...cle.com>
---
 net/rds/info.c |    5 +----
 net/rds/rdma.c |    5 +----
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/net/rds/info.c b/net/rds/info.c
index 1d88553..62aeef3 100644
--- a/net/rds/info.c
+++ b/net/rds/info.c
@@ -188,10 +188,7 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval,
 		ret = -ENOMEM;
 		goto out;
 	}
-	down_read(&current->mm->mmap_sem);
-	ret = get_user_pages(current, current->mm, start, nr_pages, 1, 0,
-			     pages, NULL);
-	up_read(&current->mm->mmap_sem);
+	ret = get_user_pages_fast(start, nr_pages, 1, pages);
 	if (ret != nr_pages) {
 		if (ret > 0)
 			nr_pages = ret;
diff --git a/net/rds/rdma.c b/net/rds/rdma.c
index e390dc7..8dc83d2 100644
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -150,10 +150,7 @@ static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages,
 {
 	int ret;
 
-	down_read(&current->mm->mmap_sem);
-	ret = get_user_pages(current, current->mm, user_addr,
-			     nr_pages, write, 0, pages, NULL);
-	up_read(&current->mm->mmap_sem);
+	ret = get_user_pages_fast(user_addr, nr_pages, write, pages);
 
 	if (ret >= 0 && ret < nr_pages) {
 		while (ret--)
-- 
1.5.6.3

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