Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1245723

Re: [RFC v2 PATCH 08/14] irq: implement irq_send_ipi

Show all headers | View raw

On Tue, 13 Oct 2015, Qais Yousef wrote:

Lacks kerneldoc

> +int __irq_desc_send_ipi(struct irq_desc *desc, const struct ipi_mask *dest)
> +{
> +	struct irq_data *data = irq_desc_get_irq_data(desc);
> +	struct irq_chip *chip = irq_data_get_irq_chip(data);
> +
> +	if (!chip || !chip->irq_send_ipi)
> +		return -EINVAL;
> +
> +	/*
> +	 * Do not validate the mask for IPIs marked global. These are
> +	 * regular IPIs so we can avoid the operation as their target
> +	 * mask is the cpu_possible_mask.
> +	 */
> +	if (!dest->global) {
> +		if (!bitmap_subset(dest->cpumask, data->ipi_mask.cpumask,
> +				   dest->nbits))
> +			return -EINVAL;
> +	}

This looks half thought out. You rely on the caller getting the global
bit right. There should be a sanity check for this versus
data->ipi_mask and also you need to validate nbits.

> +EXPORT_SYMBOL(irq_send_ipi);

EXPORT_SYMBOL_GPL please

Thanks,

	tglx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[RFC v2 PATCH 00/14] Implement generic IPI support mechanism Qais Yousef <qais.yousef@imgtec.com> - 2015-10-13 12:20 +0200
  [RFC v2 PATCH 03/14] irq: add new struct ipi_mask Qais Yousef <qais.yousef@imgtec.com> - 2015-10-13 12:20 +0200
    Re: [RFC v2 PATCH 03/14] irq: add new struct ipi_mask Thomas Gleixner <tglx@linutronix.de> - 2015-10-13 15:30 +0200
      Re: [RFC v2 PATCH 03/14] irq: add new struct ipi_mask Qais Yousef <qais.yousef@imgtec.com> - 2015-10-13 16:30 +0200
  [RFC v2 PATCH 08/14] irq: implement irq_send_ipi Qais Yousef <qais.yousef@imgtec.com> - 2015-10-13 12:20 +0200
    Re: [RFC v2 PATCH 08/14] irq: implement irq_send_ipi kbuild test robot <lkp@intel.com> - 2015-10-13 13:20 +0200
    Re: [RFC v2 PATCH 08/14] irq: implement irq_send_ipi kbuild test robot <lkp@intel.com> - 2015-10-13 13:40 +0200
    Re: [RFC v2 PATCH 08/14] irq: implement irq_send_ipi Thomas Gleixner <tglx@linutronix.de> - 2015-10-13 15:50 +0200
      Re: [RFC v2 PATCH 08/14] irq: implement irq_send_ipi Qais Yousef <qais.yousef@imgtec.com> - 2015-10-13 16:50 +0200
  Re: [RFC v2 PATCH 00/14] Implement generic IPI support mechanism Thomas Gleixner <tglx@linutronix.de> - 2015-10-13 16:00 +0200
    Re: [RFC v2 PATCH 00/14] Implement generic IPI support mechanism Qais Yousef <qais.yousef@imgtec.com> - 2015-10-13 16:50 +0200
    Re: [RFC v2 PATCH 00/14] Implement generic IPI support mechanism Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2015-10-13 19:30 +0200
      Re: [RFC v2 PATCH 00/14] Implement generic IPI support mechanism Thomas Gleixner <tglx@linutronix.de> - 2015-10-13 19:30 +0200
  Re: [RFC v2 PATCH 00/14] Implement generic IPI support mechanism Davidlohr Bueso <dave@stgolabs.net> - 2015-10-14 17:10 +0200
    Re: [RFC v2 PATCH 00/14] Implement generic IPI support mechanism Qais Yousef <qais.yousef@imgtec.com> - 2015-10-14 17:50 +0200

csiph-web