On Mon, 27 Nov 2023 18:40:09 -0600, Nathan Lynch wrote:

The rtas_read_config() and rtas_write_config() functions in
kernel/rtas_pci.c have external linkage and two users in arch/powerpc:
the rtas_pci code itself and the pseries platform's "enhanced error
handling" (EEH) support code.

The prototypes for these functions in asm/ppc-pci.h have until now
been guarded by CONFIG_EEH since the only external caller is the
pseries EEH code. However, this presumably has always generated
warnings when built with !CONFIG_EEH and -Wmissing-prototypes:

[...]

Applied to powerpc/next.

[1/1] powerpc/rtas_pci: rename and properly expose config access APIs
      https://git.kernel.org/powerpc/c/9be4feb768b86c25da336a6c0f3e3caefd16f1e4

cheers