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    Subject[PATCH 09/16] net/9p: switch p9_fd_read to kernel_write
    Date
    Instead of playing with the addressing limits.

    Signed-off-by: Christoph Hellwig <hch@lst.de>
    ---
    net/9p/trans_fd.c | 10 ++--------
    1 file 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 @@ static void p9_read_work(struct work_struct *work)

    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;
    --
    2.11.0
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