linux-kernel - Re: [tip:irq/core 6/17] ERROR: modpost: "irq_gc_mask_disable_and_ack_set" [drivers/irqchip/irq-brcmstb-l2.ko] undefined!

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Message-ID: <Z4g8znXQElHT2Urj@gallifrey>
Date: Wed, 15 Jan 2025 22:55:10 +0000
From: "Dr. David Alan Gilbert" <linux@...blig.org>
To: Florian Fainelli <florian.fainelli@...adcom.com>
Cc: kernel test robot <lkp@...el.com>, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [tip:irq/core 6/17] ERROR: modpost:
 "irq_gc_mask_disable_and_ack_set" [drivers/irqchip/irq-brcmstb-l2.ko]
 undefined!

* Florian Fainelli (florian.fainelli@...adcom.com) wrote:
> On 1/15/25 13:53, Dr. David Alan Gilbert wrote:
> > * kernel test robot (lkp@...el.com) wrote:
> > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
> > > head:   12cbdcb9f05559ff72eb8a04df829852804c0276
> > > commit: dd1f17a9faf5359d76644236cde4cc1720f1184d [6/17] irqchip/irq-brcmstb-l2: Replace brcmstb_l2_mask_and_ack() by generic function
> > > config: arm64-randconfig-002-20250115 (https://download.01.org/0day-ci/archive/20250116/202501160501.6r9pNtBg-lkp@intel.com/config)
> > > compiler: aarch64-linux-gcc (GCC) 14.2.0
> > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250116/202501160501.6r9pNtBg-lkp@intel.com/reproduce)
> > > 
> > > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > > the same patch/commit), kindly add following tags
> > > | Reported-by: kernel test robot <lkp@...el.com>
> > > | Closes: https://lore.kernel.org/oe-kbuild-all/202501160501.6r9pNtBg-lkp@intel.com/
> > > 
> > > All errors (new ones prefixed by >>, old ones prefixed by <<):
> > > 
> > > > > ERROR: modpost: "irq_gc_mask_disable_and_ack_set" [drivers/irqchip/irq-brcmstb-l2.ko] undefined!
> > 
> > Hmm, that's not happy is it - I'll have a look.
> 
> We should be amending your original patch with the following:
> 
> diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
> index 32ffcbb87fa1..c4a8bca5f2b0 100644
> --- a/kernel/irq/generic-chip.c
> +++ b/kernel/irq/generic-chip.c
> @@ -162,6 +162,7 @@ void irq_gc_mask_disable_and_ack_set(struct irq_data *d)
>         irq_reg_writel(gc, mask, ct->regs.ack);
>         irq_gc_unlock(gc);
>  }
> +EXPORT_SYMBOL_GPL(irq_gc_mask_disable_and_ack_set);
> 
>  /**
>   * irq_gc_eoi - EOI interrupt
> 
> 
> This was not going to be a problem back when Doug's commit was accepted, but
> later on, irq-brcmsbtb-l2 was allowed to become modular with
> 51d9db5c8fbbed160081d4cb5c193abdf67ded05 ("irqchip/irq-brcmstb-l2: Switch to
> IRQCHIP_PLATFORM_DRIVER").
> 
> This totally escaped me when I acked your patch making use of the generic
> irq_gc_mask_disable_and_ack_set implementation.

Thanks for spotting that; I'll give it a build test and post a v2 in
a little while.

Dave

> -- 
> Florian
> 
-- 
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
\        dave @ treblig.org |                               | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/