linux-kernel - Re: [PATCH] nfit: Hide unused functions behind CONFIG

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Message-ID: <CAPcyv4gA=qEm81k-f80oBBo9mmPcAg6szYQvtdOWFFWgd=9A4g@mail.gmail.com>
Date:   Mon, 7 Jan 2019 21:14:05 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Ross Zwisler <zwisler@...nel.org>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kbuild test robot <lkp@...el.com>
Subject: Re: [PATCH] nfit: Hide unused functions behind CONFIG_X86

On Mon, Jan 7, 2019 at 8:59 PM Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> On arm64 little endian allyesconfig:
>
> drivers/acpi/nfit/intel.c:149:12: warning: unused function 'intel_security_unlock' [-Wunused-function]
> static int intel_security_unlock(struct nvdimm *nvdimm,
>            ^
> drivers/acpi/nfit/intel.c:230:12: warning: unused function 'intel_security_erase' [-Wunused-function]
> static int intel_security_erase(struct nvdimm *nvdimm,
>            ^
> drivers/acpi/nfit/intel.c:279:12: warning: unused function 'intel_security_query_overwrite' [-Wunused-function]
> static int intel_security_query_overwrite(struct nvdimm *nvdimm)
>            ^
> drivers/acpi/nfit/intel.c:316:12: warning: unused function 'intel_security_overwrite' [-Wunused-function]
> static int intel_security_overwrite(struct nvdimm *nvdimm,
>            ^
> 4 warnings generated.
>
> These functions are only used in __intel_security_ops when CONFIG_X86 is
> set so only define these functions under that same condition.

Thanks for the report, not sure how the kbuild robot missed this. I'd
prefer marking the functions __maybe_unused rather than expanding the
ifdef guards.