On Wed, Sep 26, 2018 at 12:02:09AM -0700, Nathan Chancellor wrote:
> Clang emits the following warning:
>
> drivers/staging/rtl8723bs/os_dep/sdio_intf.c:25:36: warning: variable
> 'acpi_ids' is not needed and will not be emitted
> [-Wunneeded-internal-declaration]
> static const struct acpi_device_id acpi_ids[] = {
> ^
> 1 warning generated.
>
> Mark the declaration as maybe unused like a few other instances of this
> construct in the kernel.
>
> Link: https://github.com/ClangBuiltLinux/linux/issues/169
> Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> ---
> drivers/staging/rtl8723bs/os_dep/sdio_intf.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/rtl8723bs/os_dep/sdio_intf.c b/drivers/staging/rtl8723bs/os_dep/sdio_intf.c
> index 6d02904de63f..3285bf36291b 100644
> --- a/drivers/staging/rtl8723bs/os_dep/sdio_intf.c
> +++ b/drivers/staging/rtl8723bs/os_dep/sdio_intf.c
> @@ -22,7 +22,7 @@ static const struct sdio_device_id sdio_ids[] =
> { SDIO_DEVICE(0x024c, 0xb723), },
> { /* end: all zeroes */ },
> };
> -static const struct acpi_device_id acpi_ids[] = {
> +static const struct acpi_device_id acpi_ids[] __maybe_unused = {
But it is used. No "maybe" at all here. The MODULE_DEVICE_TABLE()
macro does a functional thing. Why is gcc not reporting an issue with
this and clang is?
thanks,
greg k-h
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