Commit 2137cb863b80 for kernel

commit 2137cb863b8018710315138f40eefcceb8584d1b
Merge: db28b8ae363b 4ab2ee307983
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed Dec 10 16:57:24 2025 +0900

    Merge tag 'kbuild-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux

    Pull Kbuild fix from Nathan Chancellor:

     - Fix install-extmod-build when ccache is used via CC

    * tag 'kbuild-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux:
      kbuild: install-extmod-build: Properly fix CC expansion when ccache is used