linux-kernel - About irq_create_affinity_masks() for a platform device driver

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Date:   Wed, 22 Jan 2020 10:09:41 +0000
From:   John Garry <john.garry@...wei.com>
To:     Thomas Gleixner <tglx@...utronix.de>
CC:     Marc Zyngier <maz@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        chenxiang <chenxiang66@...ilicon.com>
Subject: About irq_create_affinity_masks() for a platform device driver

Hi Thomas,

A question about the function in the $subject:

Would there be any issue with a SCSI platform device driver referencing 
this function?

So I have a multi-queue platform device, and I want to spread interrupts 
over all possible CPUs, just like we can do for PCI MSI vectors. This 
topic was touched on in [0].

And, if so it's ok, could we export that same symbol?

Cheers,
John

[0] 
https://lore.kernel.org/lkml/88d64d51-4344-e908-b55b-0583b0137ddf@huawei.com/