[dpdk-dev] irq_to_desc undefined when compiling igb_uio

Habibi, Michael michael.f.habibi at hp.com
Tue Aug 26 23:43:15 CEST 2014

I agree the kernel is old but it's what we're stuck with at the moment. It
appears that at least some thought went into this, as the code in question
is actually compatibility code added for older kernel versions such as mine:

/* Compatability wrapper for new kernel API for IRQ */
#define irq_data irq_desc
#define irq_get_irq_data(irq) irq_to_desc(irq)
#define irq_data_get_msi(data) get_irq_desc_msi(data)

I may just export the symbol for now. Unfortunately I'm not familiar enough
with this area of the code, but if I end up tackling this I'll see if I can
submit a patch if it hasn't been fixed by then.


P.S. Aaro sorry for the duplicate email. I resent this without my digital signature so it would get through the mailing list.

-----Original Message-----
From: Aaro Koskinen [mailto:aaro.koskinen at iki.fi]
Sent: Tuesday, August 26, 2014 4:33 PM
To: Habibi, Michael
Cc: dev at dpdk.org
Subject: Re: [dpdk-dev] irq_to_desc undefined when compiling igb_uio


On Tue, Aug 26, 2014 at 08:55:29PM +0000, Habibi, Michael wrote:
> I have verified in our kernel source, as well as the public source for
> 2.6.34, that irq_to_desc is not an exported function.
> However the documentation states that the minimum version required is
> only 2.6.33. Did I setup my environment or build my kernel incorrectly?

It's probably just that nobody has ever bothered to test latest DPDK with your kernel version before. Note that Linux 2.6.34 is EOL and you should upgrade your kernel anyway.


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