diff -ur lin_tape-3.0.18/Makefile lin_tape-3.0.18-ifdefs/Makefile
--- lin_tape-3.0.18/Makefile	2017-05-09 21:11:32.977092391 +0200
+++ lin_tape-3.0.18-ifdefs/Makefile	2017-05-09 21:05:59.610307494 +0200
@@ -20,27 +20,6 @@
 lin_tape-objs := join.o lin_tape_scsi_config.o lin_tape_scsi_tape.o lin_tape_scsi_trace.o \
              lin_tape_ioctl_tape.o lin_tape_ioctl_changer.o lin_tape_extra_ioctl.o
 
-RHELRELEASE := $(shell [ -f "/etc/redhat-release" ] && echo 1 || echo 0)
-ifeq ($(RHELRELEASE), 1)
-KERNELDIR ?= /lib/modules/$(shell uname -r)/build
-KERNELVER = $(shell uname -r 2>/dev/null|sed "s/[\.-]/_/g"|sed "s/\([0-9]*_[0-9]*_[0-9]*_[0-9]*\).*/\1/")
-EXTRA_CFLAGS += -DKERNELVERSION_${KERNELVER}
-else
-UBUNTURELEASE := $(shell [ -f "/etc/os-release" ] && grep -qi Ubuntu /etc/os-release && echo 1 || echo 0)
-ifeq ($(UBUNTURELEASE), 1)
-EXTRA_CFLAGS += -DUBUNTUVERSION
-else
-EXTRA_CFLAGS += -DSLESVERSION
-KERNELDIR ?= /lib/modules/$(shell uname -r)/build
-KERNELVER = $(shell uname -r 2>/dev/null|sed "s/[\.-]/_/g"|sed "s/\([0-9]*_[0-9]*_[0-9]*_[0-9]*\).*/\1/")
-EXTRA_CFLAGS += -DSLESKERNEL_${KERNELVER}
-SLESSP2 := $(shell grep -qi SP2 /etc/*release && echo 1 || echo 0)
-ifeq ($(SLESSP2), 1) 
-EXTRA_CFLAGS += -DSLESSP2
-endif
-endif
-endif
-
 ifeq ($(SFMP), 1)
 EXTRA_CFLAGS += -DSFMPENABLED
 endif
diff -ur lin_tape-3.0.18/pfo.h lin_tape-3.0.18-ifdefs/pfo.h
--- lin_tape-3.0.18/pfo.h	2017-02-23 19:14:41.000000000 +0100
+++ lin_tape-3.0.18-ifdefs/pfo.h	2017-05-09 21:06:34.117699008 +0200
@@ -26,133 +26,6 @@
  * will build for various releases of Linux.  This is how
  * we track different versions using ifdef in the source.
  */
-#ifdef KERNELVERSION_2_6_32_220
-#define BEFORE_RH_63 1
-#define BEFORE_RH_64 1
-#define BEFORE_RH_65 1
-#define BEFORE_RH_66 1
-#define BEFORE_RH_67 1
-#define BEFORE_RH_70 1
-#define BEFORE_RH_71 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_2_6_32_279
-#define AFTER_RH_62 1
-#define BEFORE_RH_64 1
-#define BEFORE_RH_65 1
-#define BEFORE_RH_66 1
-#define BEFORE_RH_67 1
-#define BEFORE_RH_70 1
-#define BEFORE_RH_71 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_2_6_32_358
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define BEFORE_RH_65 1
-#define BEFORE_RH_66 1
-#define BEFORE_RH_67 1
-#define BEFORE_RH_70 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_2_6_32_431
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define BEFORE_RH_66 1
-#define BEFORE_RH_67 1
-#define BEFORE_RH_70 1
-#define BEFORE_RH_71 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_2_6_32_504
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define AFTER_RH_65 1
-#define BEFORE_RH_67 1
-#define BEFORE_RH_70 1
-#define BEFORE_RH_71 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_2_6_32_573
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define AFTER_RH_65 1
-#define AFTER_RH_66 1
-#define BEFORE_RH_70 1
-#define BEFORE_RH_71 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_2_6_32_642
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define AFTER_RH_65 1
-#define AFTER_RH_66 1
-#define AFTER_RH_67 1
-#define BEFORE_RH_70 1
-#define BEFORE_RH_71 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_2_6_32_696
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define AFTER_RH_65 1
-#define AFTER_RH_66 1
-#define AFTER_RH_67 1
-#define AFTER_RH_68 1
-#define BEFORE_RH_70 1
-#define BEFORE_RH_71 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_3_10_0_123
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define AFTER_RH_65 1
-#define AFTER_RH_66 1
-#define AFTER_RH_67 1
-#define AFTER_RH_6x 1
-#define BEFORE_RH_71 1
-#endif
-#ifdef KERNELVERSION_3_10_0_229
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define AFTER_RH_65 1
-#define AFTER_RH_66 1
-#define AFTER_RH_67 1
-#define AFTER_RH_6x 1
-#define AFTER_RH_70 1
-#define BEFORE_RH_72 1
-#endif
-#ifdef KERNELVERSION_3_10_0_327
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define AFTER_RH_65 1
-#define AFTER_RH_66 1
-#define AFTER_RH_67 1
-#define AFTER_RH_6x 1
-#define AFTER_RH_70 1
-#define AFTER_RH_71 1
-#endif
-#ifdef KERNELVERSION_3_10_0_514
-#define AFTER_RH_62 1
-#define AFTER_RH_63 1
-#define AFTER_RH_64 1
-#define AFTER_RH_65 1
-#define AFTER_RH_66 1
-#define AFTER_RH_67 1
-#define AFTER_RH_6x 1
-#define AFTER_RH_70 1
-#define AFTER_RH_71 1
-#define AFTER_RH_72 1
-#endif
-#ifdef KERNELVERSION_3_10_0_693
 #define AFTER_RH_62 1
 #define AFTER_RH_63 1
 #define AFTER_RH_64 1
@@ -126,7 +35,6 @@
 #define AFTER_RH_71 1
 #define AFTER_RH_72 1
 #define AFTER_RH_73 1
-#endif
 
 /* Misc defines needed so source is same for all versions of Linux */
 #ifndef SDEV_TRANSPORT_OFFLINE