Index: head/graphics/libdrm/files/patch-xf86drmMode.c
===================================================================
--- head/graphics/libdrm/files/patch-xf86drmMode.c	(revision 399863)
+++ head/graphics/libdrm/files/patch-xf86drmMode.c	(revision 399864)
@@ -1,46 +1,54 @@
 Disable checking for hw.dri.%d.modesetting.
 This sysctl is only available if a KMS module is loaded. But the libdrm
 check happens before X got a chance of loading the KMS module.
 
---- xf86drmMode.c.orig	2014-08-27 20:04:46.000000000 +0200
-+++ xf86drmMode.c	2014-10-18 15:12:02.586937600 +0200
-@@ -774,38 +774,7 @@
+--- xf86drmMode.c.orig	2015-08-21 16:50:01.000000000 +0200
++++ xf86drmMode.c	2015-10-20 17:34:48.000000000 +0200
+@@ -47,6 +47,7 @@
+ #include <stdlib.h>
+ #include <sys/ioctl.h>
+ #ifdef HAVE_SYS_SYSCTL_H
++#include <sys/types.h>
+ #include <sys/sysctl.h>
+ #endif
+ #include <stdio.h>
+@@ -781,38 +782,7 @@ int drmCheckModesettingSupported(const c
  	if (found)
  		return 0;
  #elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
 -	char kbusid[1024], sbusid[1024];
 -	char oid[128];
 -	int domain, bus, dev, func;
 -	int i, modesetting, ret;
 -	size_t len;
 -
 -	ret = sscanf(busid, "pci:%04x:%02x:%02x.%d", &domain, &bus, &dev,
 -	    &func);
 -	if (ret != 4)
 -		return -EINVAL;
 -	snprintf(kbusid, sizeof(kbusid), "pci:%04x:%02x:%02x.%d", domain, bus,
 -	    dev, func);
 -
 -	/* How many GPUs do we expect in the machine ? */
 -	for (i = 0; i < 16; i++) {
 -		snprintf(oid, sizeof(oid), "hw.dri.%d.busid", i);
 -		len = sizeof(sbusid);
 -		ret = sysctlbyname(oid, sbusid, &len, NULL, 0);
 -		if (ret == -1) {
 -			if (errno == ENOENT)
 -				continue;
 -			return -EINVAL;
 -		}
 -		if (strcmp(sbusid, kbusid) != 0)
 -			continue;
 -		snprintf(oid, sizeof(oid), "hw.dri.%d.modesetting", i);
 -		len = sizeof(modesetting);
 -		ret = sysctlbyname(oid, &modesetting, &len, NULL, 0);
 -		if (ret == -1 || len != sizeof(modesetting))
 -			return -EINVAL;
 -		return (modesetting ? 0 : -ENOSYS);
 -	}
 +	return 0;
  #elif defined(__DragonFly__)
  	return 0;
  #endif