Index: head/lang/intel-compute-runtime/files/patch-max_freq
===================================================================
--- head/lang/intel-compute-runtime/files/patch-max_freq	(revision 533252)
+++ head/lang/intel-compute-runtime/files/patch-max_freq	(revision 533253)
@@ -1,57 +1,53 @@
 /sys/bus/pci/devices doesn't exist as kms-drm exports sysfs via sysctl
 
   $ clinfo | fgrep clock
     Max clock frequency                             0MHz
 
 --- shared/source/os_interface/linux/drm_query.cpp.orig	2020-04-17 18:43:38 UTC
 +++ shared/source/os_interface/linux/drm_query.cpp
-@@ -11,10 +11,41 @@
+@@ -11,10 +11,37 @@
  
  #include <fstream>
  
 +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 +#include <sys/param.h>
 +#include <sys/sysctl.h>
-+#include <sys/stat.h>
++#include <cstdio>
 +#include <cstdlib>
 +#endif
 +
  namespace NEO {
  
  int Drm::getMaxGpuFrequency(HardwareInfo &hwInfo, int &maxGpuFrequency) {
      maxGpuFrequency = 0;
 +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-+    struct stat sb;
-+    if (fstat(getFileDescriptor(), &sb)) {
-+        return 0;
-+    }
 +    char name[SPECNAMELEN + 1];
-+    if (!devname_r(sb.st_rdev, S_IFCHR, name, sizeof(name))) {
++    if (!fdevname_r(getFileDescriptor(), name, sizeof(name))) {
 +        return 0;
 +    }
 +    int id;
 +    if (!sscanf(name, "drm/%d", &id) && !sscanf(name, "dri/renderD%d", &id)) {
 +        return 0;
 +    }
 +
 +    char oid[MAXPATHLEN + 1];
 +    char max_freq[PAGE_SIZE];
 +    size_t len = sizeof(max_freq);
 +    snprintf(oid, sizeof(oid), "sys.class.drm.card%d.gt_max_freq_mhz", id - 128);
 +    if (sysctlbyname(oid, &max_freq, &len, NULL, 0)) {
 +        return 0;
 +    }
 +
 +    maxGpuFrequency = std::stoi(max_freq);
 +#else
      std::string clockSysFsPath = getSysFsPciPath();
  
      clockSysFsPath += "/gt_max_freq_mhz";
-@@ -26,6 +57,7 @@ int Drm::getMaxGpuFrequency(HardwareInfo &hwInfo, int 
+@@ -26,6 +53,7 @@ int Drm::getMaxGpuFrequency(HardwareInfo &hwInfo, int 
  
      ifs >> maxGpuFrequency;
      ifs.close();
 +#endif
      return 0;
  }