zfs-on-linux: don't try to redefine boolean_t

Author: arekinath

Makefile

@@ -63,6 +63,7 @@ ifeq ($(SYSTEM), Linux)
 	ifneq (,$(LIBZFS_VER))
 		HAVE_ZFS	:= $(USE_ZFS)
 		LIBZFS_CFLAGS	= $(shell pkg-config --cflags libzfs)
+		LIBZFS_CFLAGS	+= -DUSING_SPL
 		LIBZFS_LIBS	= $(shell pkg-config --libs libzfs) -lnvpair
 	else
 		HAVE_ZFS	:= no

pivy-zfs.c

@@ -57,8 +57,6 @@
 #include <libnvpair.h>
 #include <sys/dmu.h>
 
-#define USING_SPL
-
 #include "openssh/config.h"
 #include "openssh/sshkey.h"
 #include "openssh/sshbuf.h"