[Devel] [PATCH hci-8.1] configs: build with WERROR and KVM_WERROR, as RHEL does

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Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] configs: commit message cites a nonexistent UML config exemption for WERROR
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commit e34168fc988cd9c5d2c187255bd4bad60ab0fb1d
Author: Konstantin Khorenko <khorenko at virtuozzo.com>

configs: build with WERROR and KVM_WERROR, as RHEL does

This commit adds CONFIG_WERROR=y and CONFIG_KVM_WERROR=y to
redhat/configs/custom-overrides/generic so that the vz kernel builds with
-Werror, as RHEL does. The commit message says the UML config
kernel-um-rhel.config is kept with CONFIG_WERROR unset.

Link: https://virtuozzo.atlassian.net/browse/VSTOR-151903

> diff --git a/redhat/configs/custom-overrides/generic/CONFIG_KVM_WERROR b/redhat/configs/custom-overrides/generic/CONFIG_KVM_WERROR
> new file mode 100644
> index 0000000000000..af20cbee74354
> --- /dev/null
> +++ b/redhat/configs/custom-overrides/generic/CONFIG_KVM_WERROR
> @@ -0,0 +1 @@
> +CONFIG_KVM_WERROR=y

[ ... ]

> diff --git a/redhat/configs/custom-overrides/generic/CONFIG_WERROR b/redhat/configs/custom-overrides/generic/CONFIG_WERROR
> new file mode 100644
> index 0000000000000..f54ff6cdaab85
> --- /dev/null
> +++ b/redhat/configs/custom-overrides/generic/CONFIG_WERROR
> @@ -0,0 +1 @@
> +CONFIG_WERROR=y

[Severity: Low]
The commit message says "UML kernel build produces warnings, so we keep
kernel-um-rhel.config with CONFIG_WERROR unset."  Is this exemption
actually implemented anywhere in this tree?

A search for kernel-um-rhel.config, kernel-um and um-rhel finds no matches.
The only UML-related files are tools/testing/kunit/configs/arch_uml.config,
coverage_uml.config and the wireguard selftest um.config, and none of them
come from the redhat/configs layers.

redhat/configs/priority.rhel sets:

    ORDER=common rhel pending-rhel custom-overrides

so custom-overrides is merged last into every listed flavor, and the new
custom-overrides/generic/CONFIG_WERROR (=y) overrides
common/generic/CONFIG_WERROR (# CONFIG_WERROR is not set) in every generated
config.  priority.rhel lists only x86_64, ppc64le, s390x (including
zfcpdump), aarch64 and riscv64 flavors, so there is no UML flavor that could
be exempted.

If kernel-um-rhel.config is a standalone file in a separate vz build
repository, the build is unaffected and only the commit message cannot be
verified from this tree.  If it is derived from these layers, would
CONFIG_WERROR=y reach it and break the UML build on its known warnings?

Could the commit message say where kernel-um-rhel.config lives, or could the
exemption be made explicit in this tree?

Also, since both overrides sit in custom-overrides/generic, they apply to
every flavor, including debug, rt, automotive and zfcpdump, and not only the
main ones.  Is that intended?

-- 
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261027-b4-prep-khorenko-vstor-151903-werror-v1-1-00b3a34049dd@virtuozzo.com?part=1