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Subject[PATCH 9/9] kbuild: rpm-pkg: do not force -jN in submake
The spec file always passes %{?_smp_mflags}, but we have two
problems here.

[1] "make -jN rpm-pkg" emits the following warning message:

make[2]: warning: -jN forced in submake: disabling jobserver mode.

[2] We can not specify the number of jobs that run in parallel.
Whether we give -jN or not from the top Makefile, the spec file
always passes ${?_smp_mflags} to the build commands.

${?_smp_mflags} will be useful when we run rpmbuild by hand. When we
invoke it from Makefile, -jN is propagated down to submake; it should
not be overridden because we want to respect the number of jobs given
by the user. Set _smp_mflags to empty string in this case.

Signed-off-by: Masahiro Yamada <>

scripts/package/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 70eea1e..9ed96aef 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -50,7 +50,8 @@ rpm-pkg rpm: FORCE
$(MAKE) clean
$(CONFIG_SHELL) $(MKSPEC) >$(objtree)/kernel.spec
$(call cmd,src_tar,$(KERNELPATH),kernel.spec)
- +rpmbuild $(RPMOPTS) --target $(UTS_MACHINE) -ta $(KERNELPATH).tar.gz
+ +rpmbuild $(RPMOPTS) --target $(UTS_MACHINE) -ta $(KERNELPATH).tar.gz \
+ --define='_smp_mflags %{nil}'

# binrpm-pkg
# ---------------------------------------------------------------------------
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