On Fri, Sep 18, 2020 at 01:14:23PM -0700, Sami Tolvanen wrote: > With LTO, the compiler doesn't necessarily obey the link order for > initcalls, and initcall variables need globally unique names to avoid > collisions at link time. > > This change exports __KBUILD_MODNAME and adds the initcall_id() macro, > which uses it together with __COUNTER__ and __LINE__ to help ensure > these variables have unique names, and moves each variable to its own > section when LTO is enabled, so the correct order can be specified using > a linker script. > > The generate_initcall_ordering.pl script uses nm to find initcalls from > the object files passed to the linker, and generates a linker script > that specifies the same order for initcalls that we would have without > LTO. With LTO enabled, the script is called in link-vmlinux.sh through > jobserver-exec to limit the number of jobs spawned. > > Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> Thanks for the update; using jobserver-exec looks much better for controlling the build resources. :) Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> -- Kees Cook
