linux-kernel - Re: [PATCH v5 06/37] MIPS: irq_cpu: declare irqchip table entry

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Date:	Tue, 26 May 2015 17:38:59 +0200
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Paul Burton <paul.burton@...tec.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>
Cc:	linux-mips@...ux-mips.org, Lars-Peter Clausen <lars@...afoo.de>,
	Qais Yousef <qais.yousef@...tec.com>,
	Andrew Bresticker <abrestic@...omium.org>,
	linux-kernel@...r.kernel.org, Felix Fietkau <nbd@...nwrt.org>
Subject: Re: [PATCH v5 06/37] MIPS: irq_cpu: declare irqchip table entry

On Sun, May 24, 2015 at 04:11:16PM +0100, Paul Burton wrote:

> Subject: [PATCH v5 06/37] MIPS: irq_cpu: declare irqchip table entry
> Content-Type: text/plain
> 
> Allow the MIPS CPU interrupt controller to be probed from DT using the
> generic __irqchip_of_table for platforms which use irqchip_init. This
> will avoid such platforms needing to duplicate the compatible string &
> init function pointer.
> 
> Signed-off-by: Paul Burton <paul.burton@...tec.com>
> Cc: Lars-Peter Clausen <lars@...afoo.de>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: linux-mips@...ux-mips.org
> ---
> 
> Changes in v5: None
> Changes in v4: None
> Changes in v3:
> - Rebase.
> 
> Changes in v2: None
> 
>  arch/mips/kernel/irq_cpu.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/mips/kernel/irq_cpu.c b/arch/mips/kernel/irq_cpu.c
> index 6eb7a3f..f96313d 100644
> --- a/arch/mips/kernel/irq_cpu.c
> +++ b/arch/mips/kernel/irq_cpu.c
> @@ -38,6 +38,8 @@
>  #include <asm/mipsmtregs.h>
>  #include <asm/setup.h>
>  
> +#include "../../drivers/irqchip/irqchip.h"
> +
>  static inline void unmask_mips_irq(struct irq_data *d)
>  {
>  	set_c0_status(0x100 << (d->irq - MIPS_CPU_IRQ_BASE));
> @@ -167,3 +169,4 @@ int __init mips_cpu_irq_of_init(struct device_node *of_node,
>  	__mips_cpu_irq_init(of_node);
>  	return 0;
>  }
> +IRQCHIP_DECLARE(cpu_intc, "mti,cpu-interrupt-controller", mips_cpu_irq_of_init);

Having to type "../" to get an include file should be a strong indicator
something is wrong.  In this case it probably means irq_cpu.c should be
moved to drivers/irqchip/.

The same gem also exists in arch/arc/kernel/irq.c and arch/microblaze/-
kernel/intc.c.  And two more files arch/arm/mach-imx/gpc.c and
arch/arm/mach-omap2/omap-wakeupgen.c are avoiding the issue by coding
their private variants of IRQCHIP_DECLARE.

  Ralf
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