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Commit c972d750 authored by Richard Kennedy's avatar Richard Kennedy Committed by Dave Airlie
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drm: reorder struct drm_ioctl_desc to save space on 64 bit builds 



shrinks drm_ioctl_desc from 24 bytes to 16 bytes by reordering members
to remove padding.

updates DRM_IOCTL_DEF macro to initialise structure members by name to
handle the structure reorder.

The applied patch reduces data used in drm.ko from 10440 to 9032

Signed-off-by: default avatarRichard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 40fc6eab

include/drm/drmP.h

+3 −3
Original line number Diff line number Diff line
@@ -281,16 +281,16 @@ typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd, 


struct drm_ioctl_desc {

	unsigned int cmd;

	drm_ioctl_t *func;

	int flags;

	drm_ioctl_t *func;

};



/**

 * Creates a driver or general drm_ioctl_desc array entry for the given

 * ioctl, for use by drm_ioctl().

 */

#define DRM_IOCTL_DEF(ioctl, func, flags) \

	[DRM_IOCTL_NR(ioctl)] = {ioctl, func, flags}

#define DRM_IOCTL_DEF(ioctl, _func, _flags) \

	[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags}



struct drm_magic_entry {

	struct list_head head;