find-provides.ksyms is invoked ~8000 times during rpmbuild of a kernel. This takes >10 minutes. It's beneficial to speed it up

This construct is slow (probably entails 2-3 forks, and one exec):

    dep_pfx="ksym"
    printf "%s" "$module" | grep -v "^${RPM_BUILD_ROOT}/\?lib/modules/[1-9][^/]*/kernel" > /dev/null \
        || dep_pfx="kernel"

What is seems to do is to set dep_pfx for "kernel" if path is /lib/modules/Nxxxxxx/kernel/yyyyyy. (well... what is that "\?" for?... anyway).

This can be achieved with shell string manipulations:

a=${module#${RPM_BUILD_ROOT}lib/modules/[0-9]*/kernel/}
a=${a#${RPM_BUILD_ROOT}/lib/modules/[0-9]*/kernel/}

If $a is not equal to $module, then the path was ${RPM_BUILD_ROOT}/lib/modules/Nxxxxxx/kernel/yyyyyy (or ${RPM_BUILD_ROOT}lib/modules/Nxxxxxx/kernel/yyyyyy, that is, there was a slash at the end of ${RPM_BUILD_ROOT} expansion)

*** Bug 2172514 has been marked as a duplicate of this bug. ***

This bug appears to have been reported against 'rawhide' during the Fedora Linux 39 development cycle.
Changing version to 39.