linux-kernel - Re: [PATCH 10/22] m68k/mac: psc - Modernize printing of kernel messages

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Date:   Thu, 8 Dec 2016 10:10:31 +1100 (AEDT)
From:   Finn Thain <fthain@...egraphics.com.au>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
cc:     Greg Ungerer <gerg@...ux-m68k.org>, Sam Creasey <sammy@...my.net>,
        Joshua Thompson <funaho@...ai.org>,
        linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/22] m68k/mac: psc - Modernize printing of kernel
 messages


On Wed, 7 Dec 2016, Geert Uytterhoeven wrote:

>   - Introduce helpers for printing debug messages, incl. dummies for
>     validating format strings when debugging is disabled,
>   - Convert from printk() to pr_*(),
>   - Add missing continuations,
>   - Drop superfluous casts.
> 
> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> ---
>  arch/m68k/mac/psc.c | 32 +++++++++++++++-----------------
>  1 file changed, 15 insertions(+), 17 deletions(-)
> 
> diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c
> index cb2b1a3a2b62d97f..83f81790c9eba80a 100644
> --- a/arch/m68k/mac/psc.c
> +++ b/arch/m68k/mac/psc.c
> @@ -26,6 +26,11 @@
>  #include <asm/mac_psc.h>
>  
>  #define DEBUG_PSC
> +#ifdef DEBUG_IRQS
> +#define pr_irq(fmt, ...) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
> +#else
> +#define pr_irq(fmt, ...) no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
> +#endif
>  
>  volatile __u8 *psc;
>  EXPORT_SYMBOL_GPL(psc);

Please remove the DEBUG_IRQS messages and macro.

> @@ -42,10 +47,9 @@ static void psc_debug_dump(void)
>  		return;
>  
>  	for (i = 0x30 ; i < 0x70 ; i += 0x10) {
> -		printk("PSC #%d:  IFR = 0x%02X IER = 0x%02X\n",
> -			i >> 4,
> -			(int) psc_read_byte(pIFRbase + i),
> -			(int) psc_read_byte(pIERbase + i));
> +		pr_info("PSC #%d:  IFR = 0x%02X IER = 0x%02X\n", i >> 4,
> +			psc_read_byte(pIFRbase + i),
> +			psc_read_byte(pIERbase + i));
>  	}
>  }
>  
> @@ -59,14 +63,14 @@ static __init void psc_dma_die_die_die(void)
>  {
>  	int i;
>  
> -	printk("Killing all PSC DMA channels...");
> +	pr_info("Killing all PSC DMA channels...");
>  	for (i = 0 ; i < 9 ; i++) {
>  		psc_write_word(PSC_CTL_BASE + (i << 4), 0x8800);
>  		psc_write_word(PSC_CTL_BASE + (i << 4), 0x1000);
>  		psc_write_word(PSC_CMD_BASE + (i << 5), 0x1100);
>  		psc_write_word(PSC_CMD_BASE + (i << 5) + 0x10, 0x1100);
>  	}
> -	printk("done!\n");
> +	pr_cont("done!\n");
>  }
>  
>  /*
> @@ -92,7 +96,7 @@ void __init psc_init(void)
>  
>  	psc = (void *) PSC_BASE;
>  
> -	printk("PSC detected at %p\n", psc);
> +	pr_info("PSC detected at %p\n", psc);
>  
>  	psc_dma_die_die_die();
>  
> @@ -122,10 +126,8 @@ static void psc_irq(struct irq_desc *desc)
>  	int irq_num;
>  	unsigned char irq_bit, events;
>  
> -#ifdef DEBUG_IRQS
> -	printk("psc_irq: irq %u pIFR = 0x%02X pIER = 0x%02X\n",
> -		irq, (int) psc_read_byte(pIFR), (int) psc_read_byte(pIER));
> -#endif
> +	pr_irq("psc_irq: irq %u pIFR = 0x%02X pIER = 0x%02X\n", irq,
> +	       psc_read_byte(pIFR), psc_read_byte(pIER));
>  
>  	events = psc_read_byte(pIFR) & psc_read_byte(pIER) & 0xF;
>  	if (!events)
> @@ -160,9 +162,7 @@ void psc_irq_enable(int irq) {
>  	int irq_idx	= IRQ_IDX(irq);
>  	int pIER	= pIERbase + (irq_src << 4);
>  
> -#ifdef DEBUG_IRQUSE
> -	printk("psc_irq_enable(%d)\n", irq);
> -#endif
> +	pr_irq("psc_irq_enable(%d)\n", irq);
>  	psc_write_byte(pIER, (1 << irq_idx) | 0x80);
>  }
>  
> @@ -171,8 +171,6 @@ void psc_irq_disable(int irq) {
>  	int irq_idx	= IRQ_IDX(irq);
>  	int pIER	= pIERbase + (irq_src << 4);
>  
> -#ifdef DEBUG_IRQUSE
> -	printk("psc_irq_disable(%d)\n", irq);
> -#endif
> +	pr_irq("psc_irq_disable(%d)\n", irq);
>  	psc_write_byte(pIER, 1 << irq_idx);
>  }
> 

Same for DEBUG_IRQUSE.

Thanks.

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