Hello, with these patches it is possible to install kernel modules under an arbitrary prefix - eg. moving the /lib/modules to /usr/lib/modules with /usr prefix. While the modprobe.d and depmod.d search which already includes multiple paths is expanded to also include $(prefix) the module directory still supports only one location, only a different one under $(module_prefix). Having kmod search multiple module locations while only one is supported now might break some assumption about relative modulke path corresponding to a specific file, would require more invasive changes to implement, and is not supportive of the goal of moving the modules away from /lib. Both kmod and the kernel need to be patched to make use of this feature. Patched kernel is backwards compatible with older kmod. Patched kmod with empty $(module_prefix) is equivalent to unpatched kmod. Thanks Michal Link: https://lore.kernel.org/linux-modules/20210112160211.5614-1-msuchanek@xxxxxxx/ Michal Suchanek (4): man/depmod.d: Fix incorrect /usr/lib search path libkmod, depmod: Load modprobe.d, depmod.d from $prefix/lib. kmod: Add config command to show compile time configuration as JSON libkmod, depmod, modprobe: Search for kernel modules under ${module_prefix} Makefile.am | 4 +- configure.ac | 7 ++ libkmod/libkmod.c | 7 +- man/Makefile.am | 10 ++- man/depmod.d.xml | 9 ++- man/depmod.xml | 4 +- man/kmod.xml | 6 ++ man/modinfo.xml | 2 +- man/modprobe.d.xml | 1 + man/modprobe.xml | 2 +- man/modules.dep.xml | 6 +- testsuite/module-playground/Makefile | 2 +- testsuite/setup-rootfs.sh | 109 +++++++++++++++------------ testsuite/test-depmod.c | 16 ++-- testsuite/test-testsuite.c | 8 +- tools/depmod.c | 7 +- tools/kmod.c | 40 ++++++++++ tools/modinfo.c | 4 +- tools/modprobe.c | 4 +- tools/static-nodes.c | 6 +- 20 files changed, 166 insertions(+), 88 deletions(-) -- 2.41.0
