On 1/11/24 12:11, Andy Shevchenko wrote:
> Switch from ugly ifdeffery to using EXPORT_PM_FN_NS_GPL()
> for exporting PM functions. This helps cleaning up the other
> SDHCI drivers in the future.
It seems sdhci is the first code in the kernel to use
EXPORT_PM_FN_NS_GPL() but it was not asked for ;-)
As such, can you fill in a little background. I am not
sure what it achieves. Why have CONFIG_PM if not to
#ifdef dependent code behind it?
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci.c | 14 ++++----------
> drivers/mmc/host/sdhci.h | 2 --
> 2 files changed, 4 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index f4a7733a8ad2..2214280ca5fb 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -3733,8 +3733,6 @@ EXPORT_SYMBOL_GPL(sdhci_thread_irq);
> * *
> \*****************************************************************************/
>
> -#ifdef CONFIG_PM
> -
> static bool sdhci_cd_irq_can_wakeup(struct sdhci_host *host)
> {
> return mmc_card_is_removable(host->mmc) &&
> @@ -3814,8 +3812,7 @@ int sdhci_suspend_host(struct sdhci_host *host)
>
> return 0;
> }
> -
> -EXPORT_SYMBOL_GPL(sdhci_suspend_host);
> +EXPORT_PM_FN_GPL(sdhci_suspend_host);
>
> int sdhci_resume_host(struct sdhci_host *host)
> {
> @@ -3853,8 +3850,7 @@ int sdhci_resume_host(struct sdhci_host *host)
>
> return ret;
> }
> -
> -EXPORT_SYMBOL_GPL(sdhci_resume_host);
> +EXPORT_PM_FN_GPL(sdhci_resume_host);
>
> int sdhci_runtime_suspend_host(struct sdhci_host *host)
> {
> @@ -3876,7 +3872,7 @@ int sdhci_runtime_suspend_host(struct sdhci_host *host)
>
> return 0;
> }
> -EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host);
> +EXPORT_PM_FN_GPL(sdhci_runtime_suspend_host);
>
> int sdhci_runtime_resume_host(struct sdhci_host *host, int soft_reset)
> {
> @@ -3927,9 +3923,7 @@ int sdhci_runtime_resume_host(struct sdhci_host *host, int soft_reset)
>
> return 0;
> }
> -EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host);
> -
> -#endif /* CONFIG_PM */
> +EXPORT_PM_FN_GPL(sdhci_runtime_resume_host);
>
> /*****************************************************************************\
> * *
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index cd0e35a80542..4ee2695b0202 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -874,12 +874,10 @@ irqreturn_t sdhci_thread_irq(int irq, void *dev_id);
> void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,
> dma_addr_t addr, int len, unsigned int cmd);
>
> -#ifdef CONFIG_PM
> int sdhci_suspend_host(struct sdhci_host *host);
> int sdhci_resume_host(struct sdhci_host *host);
> int sdhci_runtime_suspend_host(struct sdhci_host *host);
> int sdhci_runtime_resume_host(struct sdhci_host *host, int soft_reset);
> -#endif
>
> void sdhci_cqe_enable(struct mmc_host *mmc);
> void sdhci_cqe_disable(struct mmc_host *mmc, bool recovery);
