devtmpfs: use do_mount() instead of ksys_mount()
In devtmpfs, do_mount() can be called directly instead of complex wrapping
by ksys_mount():
- the first and third arguments are const strings in the kernel,
and do not need to be copied over from userspace;
- the fifth argument is NULL, and therefore no page needs to be
copied over from userspace;
- the second and fourth argument are passed through anyway.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
diff --git a/init/do_mounts.c b/init/do_mounts.c
index af9cda8..43f6d09 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -670,7 +670,7 @@ void __init prepare_namespace(void)
mount_root();
out:
- devtmpfs_mount("dev");
+ devtmpfs_mount();
ksys_mount(".", "/", NULL, MS_MOVE, NULL);
ksys_chroot(".");
}