linux-kernel - Re: [PATCH -mm 1/4] Blackfin: architecture update patch

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Date:	Wed, 21 Mar 2007 11:25:39 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	bryan.wu@...log.com
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	bert hubert <bert.hubert@...herlabs.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm 1/4] Blackfin: architecture update patch

On Wednesday 21 March 2007, Wu, Bryan wrote:

> @@ -97,6 +97,11 @@ static inline void leds_switch(int flag)
>  /*
>   * The idle loop on BFIN
>   */
> +#ifdef CONFIG_IDLE_L1
> +static inline void default_idle(void)__attribute__((l1_text));
> +void cpu_idle(void)__attribute__((l1_text));
> +#endif
> +

A forward declaration for an inline function seems rather pointless.
Moreover, marking default_idle both l1_text and inline seems
contradicting, right?

> diff -purN linux-2.6-orig/include/asm-blackfin/asm-offsets.h linux-2.6/include/asm-blackfin/asm-offsets.h
> --- linux-2.6-orig/include/asm-blackfin/asm-offsets.h	1970-01-01 08:00:00.000000000 +0800
> +++ linux-2.6/include/asm-blackfin/asm-offsets.h	2007-03-21 15:21:10.000000000 +0800
> @@ -0,0 +1,89 @@
> +#ifndef __ASM_OFFSETS_H__
> +#define __ASM_OFFSETS_H__
> +/*
> + * DO NOT MODIFY.
> + *
> + * This file was generated by Kbuild

This file should be in the exclude list for your diff, it is generally not
shipped with the kernel sources.

> +#ifndef __ASSEMBLY__
> +
> +static inline unsigned char readb(volatile unsigned char *addr)
> +{

The prototype for this should normally contain an __iomem.
This kind of error is normally caught by running 'make C=1'
to use the 'sparse' tool. If you have not run that yet,
you should start to, as it finds a number of common bugs.

> +/*
> + * Map some physical address range into the kernel address space.
> + */
> +static inline void *__ioremap(unsigned long physaddr, unsigned long size,
> +				int cacheflag)
> +{
> +	return (void *)physaddr;
> +}

Likewise, this should return an __iomem pointer.

The rest of the patch looks good to me.

	Arnd <><
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