V4L/DVB (10135): v4l2: introduce v4l2_file_operations.

Introduce a struct v4l2_file_operations for v4l2 drivers.

Remove the unnecessary inode argument.

Move compat32 handling (and llseek) into the v4l2-dev core: this is now
handled in the v4l2 core and no longer in the drivers themselves.

Note that this changeset reverts an earlier patch that changed the return
type of__video_ioctl2 from int to long. This change will be reinstated
later in a much improved version.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index 0a88d1d17d30..4d8ce34551df 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -25,6 +25,7 @@
 #define VFL_TYPE_MAX            4
 
 struct v4l2_ioctl_callbacks;
+struct video_device;
 struct v4l2_device;
 
 /* Flag to mark the video_device struct as unregistered.
@@ -32,6 +33,18 @@ struct v4l2_device;
    device access. It is set by video_unregister_device. */
 #define V4L2_FL_UNREGISTERED    (0)
 
+struct v4l2_file_operations {
+        struct module *owner;
+        ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
+        ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
+        unsigned int (*poll) (struct file *, struct poll_table_struct *);
+        int (*ioctl) (struct file *, unsigned int, unsigned long);
+        long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
+        int (*mmap) (struct file *, struct vm_area_struct *);
+        int (*open) (struct file *);
+        int (*release) (struct file *);
+};
+
 /*
  * Newer version of video_device, handled by videodev2.c
  *      This version moves redundant code from video device code to
@@ -41,7 +54,7 @@ struct v4l2_device;
 struct video_device
 {
         /* device ops */
-        const struct file_operations *fops;
+        const struct v4l2_file_operations *fops;
 
         /* sysfs */
         struct device dev;              /* v4l device */