perf build: Compare mman.h related headers against kernel originals

As with other cloned headers, compare the newly introduced mman related
headers against their source copy in kernel tree.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1473684871-209320-4-git-send-email-wangnan0@huawei.com
[ Added -I to ignore the uapi/ difference ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile.perf

@@ -432,6 +432,15 @@ $(PERF_IN): prepare FORCE
 	@(test -f ../../include/linux/coresight-pmu.h && ( \
 	(diff -B ../include/linux/coresight-pmu.h ../../include/linux/coresight-pmu.h >/dev/null) \
 	|| echo "Warning: tools/include/linux/coresight-pmu.h differs from kernel" >&2 )) || true
+	@(test -f ../../include/uapi/asm-generic/mman-common.h && ( \
+	(diff -B ../include/uapi/asm-generic/mman-common.h ../../include/uapi/asm-generic/mman-common.h >/dev/null) \
+	|| echo "Warning: tools/include/uapi/asm-generic/mman-common.h differs from kernel" >&2 )) || true
+	@(test -f ../../include/uapi/asm-generic/mman.h && ( \
+	(diff -B -I "^#include <\(uapi/\)*asm-generic/mman-common.h>$$" ../include/uapi/asm-generic/mman.h ../../include/uapi/asm-generic/mman.h >/dev/null) \
+	|| echo "Warning: tools/include/uapi/asm-generic/mman.h differs from kernel" >&2 )) || true
+	@(test -f ../../include/uapi/linux/mman.h && ( \
+	(diff -B -I "^#include <\(uapi/\)*asm/mman.h>$$" ../include/uapi/linux/mman.h ../../include/uapi/linux/mman.h >/dev/null) \
+	|| echo "Warning: tools/include/uapi/linux/mman.h differs from kernel" >&2 )) || true
 	$(Q)$(MAKE) $(build)=perf
 
 $(OUTPUT)perf: $(PERFLIBS) $(PERF_IN) $(LIBTRACEEVENT_DYNAMIC_LIST)