headers: Sync up some header guard changes from drm-next.

This pulls in pieces of drm-next d65d31388a23
("Merge tag 'drm-misc-next-fixes-2017-11-07' of
git://anongit.freedesktop.org/drm/drm-misc into drm-next")

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>

include/drm/README

@@ -86,10 +86,6 @@ Outdated or Broken Headers
 This section contains a list of headers and the respective "issues" they might
 have relative to their kernel equivalent.
 
-Nearly all headers:
- - Missing extern C notation.
-Status: Trivial.
-
 Most UMS headers:
  - Not using fixed size integers - compat ioctls are broken.
 Status: ?

include/drm/mga_drm.h

@@ -37,6 +37,10 @@
 
 #include "drm.h"
 
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 /* WARNING: If you change any of these defines, make sure to change the
  * defines in the Xserver file (mga_sarea.h)
  */
@@ -416,4 +420,8 @@ typedef struct drm_mga_getparam {
 	void *value;
 } drm_mga_getparam_t;
 
+#if defined(__cplusplus)
+}
+#endif
+
 #endif

include/drm/nouveau_drm.h

@@ -27,6 +27,12 @@
 
 #define NOUVEAU_DRM_HEADER_PATCHLEVEL 16
 
+#include "drm.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 struct drm_nouveau_channel_alloc {
 	uint32_t     fb_ctxdma_handle;
 	uint32_t     tt_ctxdma_handle;
@@ -207,4 +213,8 @@ struct drm_nouveau_sarea {
 #define DRM_NOUVEAU_GEM_CPU_FINI       0x43
 #define DRM_NOUVEAU_GEM_INFO           0x44
 
+#if defined(__cplusplus)
+}
+#endif
+
 #endif /* __NOUVEAU_DRM_H__ */

include/drm/qxl_drm.h

@@ -27,6 +27,10 @@
 #include <stddef.h>
 #include "drm.h"
 
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 /* Please note that modifications to all structs defined here are
  * subject to backwards-compatibility constraints.
  *
@@ -149,4 +153,8 @@ struct drm_qxl_alloc_surf {
 	DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_ALLOC_SURF,\
 		struct drm_qxl_alloc_surf)
 
+#if defined(__cplusplus)
+}
+#endif
+
 #endif

include/drm/r128_drm.h

@@ -33,6 +33,12 @@
 #ifndef __R128_DRM_H__
 #define __R128_DRM_H__
 
+#include "drm.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 /* WARNING: If you change any of these defines, make sure to change the
  * defines in the X server file (r128_sarea.h)
  */
@@ -323,4 +329,8 @@ typedef struct drm_r128_getparam {
 	void *value;
 } drm_r128_getparam_t;
 
+#if defined(__cplusplus)
+}
+#endif
+
 #endif

include/drm/savage_drm.h

@@ -26,6 +26,12 @@
 #ifndef __SAVAGE_DRM_H__
 #define __SAVAGE_DRM_H__
 
+#include "drm.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 #ifndef __SAVAGE_SAREA_DEFINES__
 #define __SAVAGE_SAREA_DEFINES__
 
@@ -207,4 +213,8 @@ union drm_savage_cmd_header {
 	} clear1;		/* SAVAGE_CMD_CLEAR data */
 };
 
+#if defined(__cplusplus)
+}
+#endif
+
 #endif

include/drm/sis_drm.h

@@ -27,6 +27,12 @@
 #ifndef __SIS_DRM_H__
 #define __SIS_DRM_H__
 
+#include "drm.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 /* SiS specific ioctls */
 #define NOT_USED_0_3
 #define DRM_SIS_FB_ALLOC	0x04
@@ -64,4 +70,8 @@ typedef struct {
 	unsigned int offset, size;
 } drm_sis_fb_t;
 
+#if defined(__cplusplus)
+}
+#endif
+
 #endif				/* __SIS_DRM_H__ */

include/drm/tegra_drm.h

@@ -20,10 +20,14 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#ifndef _UAPI_TEGRA_DRM_H_
+#ifndef _TEGRA_DRM_H_
-#define _UAPI_TEGRA_DRM_H_
+#define _TEGRA_DRM_H_
 
-#include <drm.h>
+#include "drm.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
 
 #define DRM_TEGRA_GEM_CREATE_TILED     (1 << 0)
 #define DRM_TEGRA_GEM_CREATE_BOTTOM_UP (1 << 1)
@@ -198,4 +202,8 @@ struct drm_tegra_gem_get_flags {
 #define DRM_IOCTL_TEGRA_GEM_SET_FLAGS DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_SET_FLAGS, struct drm_tegra_gem_set_flags)
 #define DRM_IOCTL_TEGRA_GEM_GET_FLAGS DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_GET_FLAGS, struct drm_tegra_gem_get_flags)
 
+#if defined(__cplusplus)
+}
+#endif
+
 #endif

include/drm/via_drm.h

@@ -26,6 +26,10 @@
 
 #include "drm.h"
 
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 /* WARNING: These defines must be the same as what the Xserver uses.
  * if you change them, you must change the defines in the Xserver.
  */
@@ -272,4 +276,8 @@ typedef struct drm_via_dmablit {
 	drm_via_blitsync_t sync;
 } drm_via_dmablit_t;
 
+#if defined(__cplusplus)
+}
+#endif
+
 #endif				/* _VIA_DRM_H_ */

include/drm/vmwgfx_drm.h

@@ -30,6 +30,10 @@
 
 #include "drm.h"
 
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 #define DRM_VMW_MAX_SURFACE_FACES 6
 #define DRM_VMW_MAX_MIP_LEVELS 24
 
@@ -1087,4 +1091,9 @@ union drm_vmw_extended_context_arg {
 	enum drm_vmw_extended_context req;
 	struct drm_vmw_context_arg rep;
 };
+
+#if defined(__cplusplus)
+}
+#endif
+
 #endif