bpfilter: switch to kernel_write

While pipes don't really need sb_writers projection, __kernel_write is an
interface better kept private, and the additional rw_verify_area does not
hurt here.

Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c
index c0f0990..1905e01 100644 (file)
--- a/net/bpfilter/bpfilter_kern.c
+++ b/net/bpfilter/bpfilter_kern.c
@@ -50,7 +50,7 @@ static int __bpfilter_process_sockopt(struct sock *sk, int optname,
        req.len = optlen;
        if (!bpfilter_ops.info.pid)
                goto out;
-       n = __kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req),
+       n = kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req),
                           &pos);
        if (n != sizeof(req)) {
                pr_err("write fail %zd\n", n);