[PATCH] ARM: fiq: change FIQ_START to a variable

[Shawn Guo]

On Thu, Jun 28, 2012 at 03:07:44PM +0800, Shawn Guo wrote:
> The commit a2be01b (ARM: only include mach/irqs.h for !SPARSE_IRQ)
> makes mach/irqs.h only be included for !SPARSE_IRQ build.  There are
> a nubmer of platforms have FIQ_START defined in mach/irqs.h for FIQ
> support.
> 
>   arch/arm/mach-rpc/include/mach/irqs.h:#define FIQ_START         64
>   arch/arm/mach-s3c24xx/include/mach/irqs.h:#define FIQ_START             IRQ_EINT0
>   arch/arm/plat-mxc/include/mach/irqs.h:#define FIQ_START 0
> 
> If SPARSE_IRQ is enabled for any of these platforms, the following
> compile error will be seen.
> 
>   arch/arm/kernel/fiq.c: In function ‘enable_fiq’:
>   arch/arm/kernel/fiq.c:127:19: error: ‘FIQ_START’ undeclared (first use in this function)
>   arch/arm/kernel/fiq.c:127:19: note: each undeclared identifier is reported only once for each function it appears in
>   arch/arm/kernel/fiq.c: In function ‘disable_fiq’:
>   arch/arm/kernel/fiq.c:132:20: error: ‘FIQ_START’ undeclared (first use in this function)
> 
> The patch changes fiq code to have init_FIQ take FIQ_START from
> platforms as a parameter and assign it to variable fiq_start which
> is to replace FIQ_START uses in enable_fiq/disable_fiq.
> 
> Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
> Cc: Russell King <linux at arm.linux.org.uk>

Hi Russell,

Sorry for the pushing.  But the whole imx sparse-irq series is being
held by this compile issue.  Can we consider the patch a solution for
the issue?

Regards,
Shawn

> Cc: Kukjin Kim <kgene.kim at samsung.com>
> Cc: Sascha Hauer <s.hauer at pengutronix.de>
> Cc: Rob Herring <rob.herring at calxeda.com>
> ---
>  arch/arm/include/asm/mach/irq.h |    2 +-
>  arch/arm/kernel/fiq.c           |    9 ++++++---
>  arch/arm/mach-rpc/irq.c         |    2 +-
>  arch/arm/plat-mxc/avic.c        |    2 +-
>  arch/arm/plat-mxc/tzic.c        |    2 +-
>  arch/arm/plat-s3c24xx/irq.c     |    2 +-
>  6 files changed, 11 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm/include/asm/mach/irq.h b/arch/arm/include/asm/mach/irq.h
> index febe495..15cb035 100644
> --- a/arch/arm/include/asm/mach/irq.h
> +++ b/arch/arm/include/asm/mach/irq.h
> @@ -17,7 +17,7 @@ struct seq_file;
>  /*
>   * This is internal.  Do not use it.
>   */
> -extern void init_FIQ(void);
> +extern void init_FIQ(int);
>  extern int show_fiq_list(struct seq_file *, int);
>  
>  #ifdef CONFIG_MULTI_IRQ_HANDLER
> diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c
> index c32f845..2adda11 100644
> --- a/arch/arm/kernel/fiq.c
> +++ b/arch/arm/kernel/fiq.c
> @@ -122,14 +122,16 @@ void release_fiq(struct fiq_handler *f)
>  	while (current_fiq->fiq_op(current_fiq->dev_id, 0));
>  }
>  
> +static int fiq_start;
> +
>  void enable_fiq(int fiq)
>  {
> -	enable_irq(fiq + FIQ_START);
> +	enable_irq(fiq + fiq_start);
>  }
>  
>  void disable_fiq(int fiq)
>  {
> -	disable_irq(fiq + FIQ_START);
> +	disable_irq(fiq + fiq_start);
>  }
>  
>  EXPORT_SYMBOL(set_fiq_handler);
> @@ -140,7 +142,8 @@ EXPORT_SYMBOL(release_fiq);
>  EXPORT_SYMBOL(enable_fiq);
>  EXPORT_SYMBOL(disable_fiq);
>  
> -void __init init_FIQ(void)
> +void __init init_FIQ(int start)
>  {
>  	no_fiq_insn = *(unsigned long *)0xffff001c;
> +	fiq_start = start;
>  }
> diff --git a/arch/arm/mach-rpc/irq.c b/arch/arm/mach-rpc/irq.c
> index cf0e669..3e4fa84 100644
> --- a/arch/arm/mach-rpc/irq.c
> +++ b/arch/arm/mach-rpc/irq.c
> @@ -163,6 +163,6 @@ void __init rpc_init_irq(void)
>  		}
>  	}
>  
> -	init_FIQ();
> +	init_FIQ(FIQ_START);
>  }
>  
> diff --git a/arch/arm/plat-mxc/avic.c b/arch/arm/plat-mxc/avic.c
> index e612cc1..f3d671f 100644
> --- a/arch/arm/plat-mxc/avic.c
> +++ b/arch/arm/plat-mxc/avic.c
> @@ -217,7 +217,7 @@ void __init mxc_init_irq(void __iomem *irqbase)
>  
>  #ifdef CONFIG_FIQ
>  	/* Initialize FIQ */
> -	init_FIQ();
> +	init_FIQ(FIQ_START);
>  #endif
>  
>  	printk(KERN_INFO "MXC IRQ initialized\n");
> diff --git a/arch/arm/plat-mxc/tzic.c b/arch/arm/plat-mxc/tzic.c
> index abc90e4..c60a7e4 100644
> --- a/arch/arm/plat-mxc/tzic.c
> +++ b/arch/arm/plat-mxc/tzic.c
> @@ -192,7 +192,7 @@ void __init tzic_init_irq(void __iomem *irqbase)
>  
>  #ifdef CONFIG_FIQ
>  	/* Initialize FIQ */
> -	init_FIQ();
> +	init_FIQ(FIQ_START);
>  #endif
>  
>  	pr_info("TrustZone Interrupt Controller (TZIC) initialized\n");
> diff --git a/arch/arm/plat-s3c24xx/irq.c b/arch/arm/plat-s3c24xx/irq.c
> index bc42c04..fe57bbb 100644
> --- a/arch/arm/plat-s3c24xx/irq.c
> +++ b/arch/arm/plat-s3c24xx/irq.c
> @@ -533,7 +533,7 @@ void __init s3c24xx_init_irq(void)
>  	int i;
>  
>  #ifdef CONFIG_FIQ
> -	init_FIQ();
> +	init_FIQ(FIQ_START);
>  #endif
>  
>  	irqdbf("s3c2410_init_irq: clearing interrupt status flags\n");
> -- 
> 1.7.5.4
> 
>