Revert driver core: move platform_data into platform_device

This reverts commit 006f4571a15fae3a0575f2a0f9e9b63b3d1012f8:

	This patch moves platform_data from struct device into
	struct platform_device, based on the two ideas:

	1. Now all platform_driver is registered by platform_driver_register,
	   which makes probe()/release()/... of platform_driver passed parameter
	   of platform_device *, so platform driver can get platform_data from
	   platform_device;

	2. Other kind of devices do not need to use platform_data, we can
	   decrease size of device if moving it to platform_device.

	Taking into consideration of thousands of files to be fixed and they
	can't be finished in one night(maybe it will take a long time), so we
	keep platform_data in device to allow two kind of cases coexist until
	all platform devices pass its platfrom data from
	platform_device->platform_data.

	All patches to do this kind of conversion are welcome.

As we don't really want to do it, it was a bad idea.

Cc: David Brownell <david-b@pacbell.net>
Cc: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 7 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index 6a69caaac18a..5d5c197bad45 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -384,13 +384,8 @@ struct device {
         struct device_driver *driver;   /* which driver has allocated this
                                            device */
         void            *driver_data;   /* data private to the driver */
-
-        void            *platform_data; /* We will remove platform_data
-                                           field if all platform devices
-                                           pass its platform specific data
-                                           from platform_device->platform_data,
-                                           other kind of devices should not
-                                           use platform_data. */
+        void            *platform_data; /* Platform specific data, device
+                                           core doesn't touch it */
         struct dev_pm_info      power;
 
 #ifdef CONFIG_NUMA