[gentoo-dev] [PATCH 6/8] kernel-build.eclass: compress xz/zstd in parallel

[Sam James <sam@gentoo.org>]

Note that this will only take effect if compressing
modules with xz or zstd (COMPRESS_MODULE_XZ is set or
COMPRESS_MODULE_ZSTD is set respectively)

... or if compiling the kernel with xz or zstd (COMPRESS_KERNEL_XZ
or COMPRESS_KERNEL_ZSTD is set respectiely).

Signed-off-by: Sam James <sam@gentoo.org>
---
 eclass/kernel-build.eclass | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/eclass/kernel-build.eclass b/eclass/kernel-build.eclass
index 98a385bf72c0..936258e9e8af 100644
--- a/eclass/kernel-build.eclass
+++ b/eclass/kernel-build.eclass
@@ -29,7 +29,7 @@ esac
 
 PYTHON_COMPAT=( python3_{8..11} )
 
-inherit python-any-r1 savedconfig toolchain-funcs kernel-install
+inherit multiprocessing python-any-r1 savedconfig toolchain-funcs kernel-install
 
 BDEPEND="
 	${PYTHON_DEPS}
@@ -90,6 +90,14 @@ kernel-build_src_configure() {
 		ARCH=$(tc-arch-kernel)
 	)
 
+	if type -P xz ; then
+		export XZ_OPT="-T$(makeopts_jobs)"
+	fi
+
+	if type -P zstd ; then
+		export ZSTD_NBTHREADS="$(makeopts_jobs)"
+	fi
+
 	restore_config .config
 	[[ -f .config ]] || die "Ebuild error: please copy default config into .config"
 
-- 
2.38.0