Index: sys/compat/linuxkpi/common/include/asm/uaccess.h
===================================================================
--- sys/compat/linuxkpi/common/include/asm/uaccess.h
+++ sys/compat/linuxkpi/common/include/asm/uaccess.h
@@ -52,11 +52,7 @@
 #define	__copy_from_user(...)	copy_from_user(__VA_ARGS__)
 #define	__copy_in_user(...)	copy_from_user(__VA_ARGS__)
 
-#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 50000
 #define	user_access_begin(ptr, len) access_ok(ptr, len)
-#else
-#define	user_access_begin() do { } while (0)
-#endif
 #define	user_access_end() do { } while (0)
 
 #define	unsafe_get_user(x, ptr, err) do { \
Index: sys/compat/linuxkpi/common/include/linux/compiler.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/compiler.h
+++ sys/compat/linuxkpi/common/include/linux/compiler.h
@@ -81,11 +81,8 @@
 
 #define	barrier()			__asm__ __volatile__("": : :"memory")
 
-#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 50000
-/* Moved from drm_os_freebsd.h */
 #define	lower_32_bits(n)		((u32)(n))
 #define	upper_32_bits(n)		((u32)(((n) >> 16) >> 16))
-#endif
 
 #define	___PASTE(a,b) a##b
 #define	__PASTE(a,b) ___PASTE(a,b)
Index: sys/compat/linuxkpi/common/include/linux/uaccess.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/uaccess.h
+++ sys/compat/linuxkpi/common/include/linux/uaccess.h
@@ -61,11 +61,7 @@
 #define	put_user(_x, _p)	__put_user(_x, _p)
 #define	clear_user(...)		linux_clear_user(__VA_ARGS__)
 
-#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 50000
 #define	access_ok(a,b)		linux_access_ok(a,b)
-#else
-#define	access_ok(a,b,c)	linux_access_ok(b,c)
-#endif
 
 extern int linux_copyin(const void *uaddr, void *kaddr, size_t len);
 extern int linux_copyout(const void *kaddr, void *uaddr, size_t len);