Re: [PATCH] mailbox: qcom-ipcc: Fix -Wunused-function with CONFIG_PM_SLEEP=n

Manivannan Sadhasivam
2022-05-24T13:53:09Z

On Mon, May 23, 2022 at 03:47:02PM -0700, Nathan Chancellor wrote:
> When CONFIG_PM_SLEEP is not set, there is a warning that
> qcom_ipcc_pm_resume() is unused:
>
> drivers/mailbox/qcom-ipcc.c:258:12: error: 'qcom_ipcc_pm_resume' defined but not used [-Werror=unused-function]
> 258 | static int qcom_ipcc_pm_resume(struct device *dev)
> | ^~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
>
> Commit 1a3c7bb08826 ("PM: core: Add new *_PM_OPS macros, deprecate old
> ones") reworked the PM_OPS macros to avoid this problem. Use
> NOIRQ_SYSTEM_SLEEP_PM_OPS directly so that qcom_ipcc_pm_resume() always
> appears to be used to the compiler, even though it will be dead code
> eliminated in the !CONFIG_PM_SLEEP case.
>
> Fixes: c25f77899753 ("mailbox: qcom-ipcc: Log the pending interrupt during resume")
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>

My bad, I missed this. Thanks for the fix!

Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>

Thanks,
Mani

> ---
> drivers/mailbox/qcom-ipcc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mailbox/qcom-ipcc.c b/drivers/mailbox/qcom-ipcc.c
> index 2583b20cdeb7..31d58b7d55fe 100644
> --- a/drivers/mailbox/qcom-ipcc.c
> +++ b/drivers/mailbox/qcom-ipcc.c
> @@ -344,7 +344,7 @@ static const struct of_device_id qcom_ipcc_of_match[] = {
> MODULE_DEVICE_TABLE(of, qcom_ipcc_of_match);
>
> static const struct dev_pm_ops qcom_ipcc_dev_pm_ops = {
> - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, qcom_ipcc_pm_resume)
> + NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, qcom_ipcc_pm_resume)
> };
>
> static struct platform_driver qcom_ipcc_driver = {
>
> base-commit: bca1a1004615efe141fd78f360ecc48c60bc4ad5
> --
> 2.36.1
>

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