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Message-ID: <20230911195621.15198-1-msuchanek@suse.de>
Date:   Mon, 11 Sep 2023 21:56:18 +0200
From:   Michal Suchanek <msuchanek@...e.de>
To:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Michal Suchanek <msuchanek@...e.de>,
        Nicolas Schier <nicolas@...sle.eu>,
        linux-modules@...r.kernel.org, Takashi Iwai <tiwai@...e.com>,
        Lucas De Marchi <lucas.de.marchi@...il.com>,
        Michal Koutný <mkoutny@...e.com>,
        Jiri Slaby <jslaby@...e.com>, Jan Engelhardt <jengelh@...i.de>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: [PATCH] kbuild: rpm-pkg: Fix build with non-default MODLIB

The default MODLIB value is composed of two variables and the hardcoded
string '/lib/modules/'.

MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)

Defining this middle part as a variable was rejected on the basis that
users can pass the whole MODLIB to make, such as

make 'MODLIB=$(INSTALL_MOD_PATH)/usr/lib/modules/$(KERNELRELEASE)'

However, this middle part of MODLIB is independently hardcoded by
rpm-pkg, and when the user alters MODLIB this is not reflected when
building the package.

Given that $(INSTALL_MOD_PATH) is overridden during the rpm package build
it is likely going to be empty. Then MODLIB can be passed to the rpm
package, and used in place of the whole
/usr/lib/modules/$(KERNELRELEASE) part.

Signed-off-by: Michal Suchanek <msuchanek@...e.de>
---
 scripts/package/kernel.spec | 14 +++++++-------
 scripts/package/mkspec      |  1 +
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/scripts/package/kernel.spec b/scripts/package/kernel.spec
index ac3f2ee6d7a0..1a727f636f67 100644
--- a/scripts/package/kernel.spec
+++ b/scripts/package/kernel.spec
@@ -67,8 +67,8 @@ cp $(%{make} %{makeflags} -s image_name) %{buildroot}/boot/vmlinuz-%{KERNELRELEA
 %{make} %{makeflags} INSTALL_HDR_PATH=%{buildroot}/usr headers_install
 cp System.map %{buildroot}/boot/System.map-%{KERNELRELEASE}
 cp .config %{buildroot}/boot/config-%{KERNELRELEASE}
-ln -fns /usr/src/kernels/%{KERNELRELEASE} %{buildroot}/lib/modules/%{KERNELRELEASE}/build
-ln -fns /usr/src/kernels/%{KERNELRELEASE} %{buildroot}/lib/modules/%{KERNELRELEASE}/source
+ln -fns /usr/src/kernels/%{KERNELRELEASE} %{buildroot}%{MODLIB}/build
+ln -fns /usr/src/kernels/%{KERNELRELEASE} %{buildroot}%{MODLIB}/source
 %if %{with_devel}
 %{make} %{makeflags} run-command KBUILD_RUN_COMMAND='${srctree}/scripts/package/install-extmod-build %{buildroot}/usr/src/kernels/%{KERNELRELEASE}'
 %endif
@@ -99,9 +99,9 @@ fi
 
 %files
 %defattr (-, root, root)
-/lib/modules/%{KERNELRELEASE}
-%exclude /lib/modules/%{KERNELRELEASE}/build
-%exclude /lib/modules/%{KERNELRELEASE}/source
+%{MODLIB}
+%exclude %{MODLIB}/build
+%exclude %{MODLIB}/source
 /boot/*
 
 %files headers
@@ -112,6 +112,6 @@ fi
 %files devel
 %defattr (-, root, root)
 /usr/src/kernels/%{KERNELRELEASE}
-/lib/modules/%{KERNELRELEASE}/build
-/lib/modules/%{KERNELRELEASE}/source
+%{MODLIB}/build
+%{MODLIB}/source
 %endif
diff --git a/scripts/package/mkspec b/scripts/package/mkspec
index d41608efb747..d41b2e5304ac 100755
--- a/scripts/package/mkspec
+++ b/scripts/package/mkspec
@@ -18,6 +18,7 @@ fi
 cat<<EOF
 %define ARCH ${ARCH}
 %define KERNELRELEASE ${KERNELRELEASE}
+%define MODLIB ${MODLIB}
 %define pkg_release $("${srctree}/init/build-version")
 EOF
 
-- 
2.41.0

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