[PATCH 14/26] nfs: Convert direct IO to use get_user_pages_fast()

[Jan Kara]

CC: Trond Myklebust <trond.mykleb...@netapp.com>
CC: linux-...@vger.kernel.org
Signed-off-by: Jan Kara <j...@suse.cz>
---
 fs/nfs/direct.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 91ff089d3412..1aaf4aa2b3d7 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -337,10 +337,8 @@ static ssize_t nfs_direct_read_schedule_segment(struct 
nfs_pageio_descriptor *de
                if (!pagevec)
                        break;
                if (uio) {
-                       down_read(&current->mm->mmap_sem);
-                       result = get_user_pages(current, current->mm, user_addr,
-                                       npages, 1, 0, pagevec, NULL);
-                       up_read(&current->mm->mmap_sem);
+                       result = get_user_pages_fast(user_addr, npages, 1,
+                                                    pagevec);
                        if (result < 0)
                                break;
                } else {
@@ -658,10 +656,8 @@ static ssize_t nfs_direct_write_schedule_segment(struct 
nfs_pageio_descriptor *d
                        break;
 
                if (uio) {
-                       down_read(&current->mm->mmap_sem);
-                       result = get_user_pages(current, current->mm, user_addr,
-                                               npages, 0, 0, pagevec, NULL);
-                       up_read(&current->mm->mmap_sem);
+                       result = get_user_pages_fast(user_addr, npages, 0,
+                                                    pagevec);
                        if (result < 0)
                                break;
                } else {
-- 
1.8.1.4

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