-Wincompatible-function-pointer-types-strict is a warning in clang-16 and newer that is designed to catch potential kCFI failures at runtime. There is one set of warnings in drivers/counter that I have not been able to figure out a solution for so this cannot be enabled for a default build but adding the warning under W=1 will allow various CI systems to catch and report new instances so it will be easier to enable in a default build in the future. The kbuild test robot reported one instance in arch/um, which is cleared up by the first patch and has an ack from an arch/um maintainer, so this should be able to go in via the kbuild tree. --- Changes in v2: - Rebase on latest kbuild tree. - Pick up Nick's reviewed-by tag. - Include arch/um patch with Anton's ack to clear up warning reported by kbuild test robot on v1. - Link to v1: https://lore.kernel.org/r/20231002-enable-wincompatible-function-pointer-types-strict-w-1-v1-1-808ab955d42d@xxxxxxxxxx --- Nathan Chancellor (2): um: net: Fix return type of uml_net_start_xmit() kbuild: Enable -Wincompatible-function-pointer-types-strict in W=1 arch/um/drivers/net_kern.c | 2 +- scripts/Makefile.extrawarn | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) --- base-commit: 4b391dcb7cda8d1353d3bd123d0989550d48c0c9 change-id: 20231002-enable-wincompatible-function-pointer-types-strict-w-1-4a56b99b8c6f Best regards, -- Nathan Chancellor <nathan@xxxxxxxxxx>
