scripts/package/Makefile: compare objtree with srctree instead of test KBUILD_OUTPUT

KBUILD_OUTPUT is always empty here, so it is useless to test it. But
while use O=.., objtree and srctree will be different. I compare them
instead.

Signed-off-by: Bin Wang <wbin00@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 87bf08076b11..d7b328595a7e 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -36,7 +36,7 @@ $(objtree)/kernel.spec: $(MKSPEC) $(srctree)/Makefile
         $(CONFIG_SHELL) $(MKSPEC) > $@
 
 rpm-pkg rpm: $(objtree)/kernel.spec FORCE
-        @if test -n "$(KBUILD_OUTPUT)"; then \
+        @if test "$(objtree)" != "$(srctree)"; then \
                 echo "Building source + binary RPM is not possible outside the"; \
                 echo "kernel source tree. Don't set KBUILD_OUTPUT, or use the"; \
                 echo "binrpm-pkg target instead."; \