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authorChristoph Hellwig <hch@lst.de>2017-09-01 18:39:18 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-09-05 02:05:16 +0300
commit670986ec01c1129db114b7720826a80756c7e899 (patch)
tree61e0145f631ecb52c58b412b41ceb9353f657ea0
parentb4bf802a5a6563c22d5e41a0f8873088bd3f655e (diff)
downloadlinux-670986ec01c1129db114b7720826a80756c7e899.tar.xz
net/9p: switch p9_fd_read to kernel_write
Instead of playing with the addressing limits. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--net/9p/trans_fd.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index f12815777beb..903a190319b9 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -422,8 +422,7 @@ error:
static int p9_fd_write(struct p9_client *client, void *v, int len)
{
- int ret;
- mm_segment_t oldfs;
+ ssize_t ret;
struct p9_trans_fd *ts = NULL;
if (client && client->status != Disconnected)
@@ -435,12 +434,7 @@ static int p9_fd_write(struct p9_client *client, void *v, int len)
if (!(ts->wr->f_flags & O_NONBLOCK))
p9_debug(P9_DEBUG_ERROR, "blocking write ...\n");
- oldfs = get_fs();
- set_fs(get_ds());
- /* The cast to a user pointer is valid due to the set_fs() */
- ret = vfs_write(ts->wr, (__force void __user *)v, len, &ts->wr->f_pos);
- set_fs(oldfs);
-
+ ret = kernel_write(ts->wr, v, len, &ts->wr->f_pos);
if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
client->status = Disconnected;
return ret;