linux-kernel - [RFC PATCH 14/68] vfs: Convert drm to use the new mount API

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Message-ID: <155373013865.7602.4323790421889477990.stgit@warthog.procyon.org.uk>
Date:   Wed, 27 Mar 2019 23:42:18 +0000
From:   David Howells <dhowells@...hat.com>
To:     viro@...iv.linux.org.uk
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, dhowells@...hat.com
Subject: [RFC PATCH 14/68] vfs: Convert drm to use the new mount API

Convert the drm filesystem to the new internal mount API as the old
one will be obsoleted and removed.  This allows greater flexibility in
communication of mount parameters between userspace, the VFS and the
filesystem.

See Documentation/filesystems/mount_api.txt for more information.

Signed-off-by: David Howells <dhowells@...hat.com>
cc: David Airlie <airlied@...ux.ie>
cc: Daniel Vetter <daniel@...ll.ch>
cc: dri-devel@...ts.freedesktop.org
---

 drivers/gpu/drm/drm_drv.c |   14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 381581b01d48..9eead5a478de 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -31,6 +31,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/mount.h>
+#include <linux/fs_context.h>
 #include <linux/slab.h>
 #include <linux/srcu.h>
 
@@ -413,20 +414,17 @@ static const struct super_operations drm_fs_sops = {
 	.statfs		= simple_statfs,
 };
 
-static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags,
-				   const char *dev_name, void *data)
+static int drm_fs_init_fs_context(struct fs_context *fc)
 {
-	return mount_pseudo(fs_type,
-			    "drm:",
-			    &drm_fs_sops,
-			    &drm_fs_dops,
-			    0x010203ff);
+	return vfs_init_pseudo_fs_context(fc, "drm:",
+					  &drm_fs_sops, NULL,
+					  &drm_fs_dops, 0x010203ff);
 }
 
 static struct file_system_type drm_fs_type = {
 	.name		= "drm",
 	.owner		= THIS_MODULE,
-	.mount		= drm_fs_mount,
+	.init_fs_context = drm_fs_init_fs_context,
 	.kill_sb	= kill_anon_super,
 };