switch drm to use Linux mutexes instead of semaphore.

I hope the fallback compat code works if not shout at me.

1 files changed, 10 insertions, 0 deletions

diff --git a/linux-core/drm_compat.h b/linux-core/drm_compat.h
index 03749d14..4f3a6688 100644
--- a/linux-core/drm_compat.h
+++ b/linux-core/drm_compat.h
@@ -195,6 +195,16 @@ static inline int remap_pfn_range(struct vm_area_struct *vma, unsigned long from
 }
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
+#define mutex_lock down
+#define mutex_unlock up
+
+#define mutex semaphore
+
+#define mutex_init(a) sema_init((a), 1)
+
+#endif
+
 /* old architectures */
 #ifdef __AMD64__
 #define __x86_64__