Hello.
On čtvrtek 27. ledna 2022 12:32:57 CET Sebastian Andrzej Siewior wrote:
> Provide generic_handle_irq_safe() which can be used can used from any
> context.
>
> Suggested-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> ---
> include/linux/irqdesc.h | 1 +
> kernel/irq/irqdesc.c | 21 +++++++++++++++++++++
> 2 files changed, 22 insertions(+)
>
> diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
> index 93d270ca0c567..a77584593f7d1 100644
> --- a/include/linux/irqdesc.h
> +++ b/include/linux/irqdesc.h
> @@ -160,6 +160,7 @@ static inline void generic_handle_irq_desc(struct irq_desc *desc)
>
> int handle_irq_desc(struct irq_desc *desc);
> int generic_handle_irq(unsigned int irq);
> +int generic_handle_irq_safe(unsigned int irq);
>
> #ifdef CONFIG_IRQ_DOMAIN
> /*
> diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
> index 2267e6527db3c..97223df2f460e 100644
> --- a/kernel/irq/irqdesc.c
> +++ b/kernel/irq/irqdesc.c
> @@ -662,6 +662,27 @@ int generic_handle_irq(unsigned int irq)
> }
> EXPORT_SYMBOL_GPL(generic_handle_irq);
>
> +/**
> + * generic_handle_irq_safe - Invoke the handler for a particular irq
> + * @irq: The irq number to handle
> + *
> + * Returns: 0 on success, or -EINVAL if conversion has failed
> + *
> + * This function must be called either from an IRQ context with irq regs
> + * initialized or with care from any context.
> + */
> +int generic_handle_irq_safe(unsigned int irq)
> +{
> + unsigned long flags;
> + int ret;
> +
> + local_irq_save(flags);
> + ret = handle_irq_desc(irq_to_desc(irq));
> + local_irq_restore(flags);
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(generic_handle_irq_safe);
> +
> #ifdef CONFIG_IRQ_DOMAIN
> /**
> * generic_handle_domain_irq - Invoke the handler for a HW irq belonging
>
Reviewed-by: Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx>
Thank you.
--
Oleksandr Natalenko (post-factum)
