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: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index ccbcd13..c8c42215 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -281,16 +281,16 @@
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;
