linux-kernel - Re: [PATCH v4 1/6] arch: unify ioremap prototypes and macro aliases

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Date:	Wed, 17 Jun 2015 11:35:13 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	arnd@...db.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
	tglx@...utronix.de, ross.zwisler@...ux.intel.com,
	akpm@...ux-foundation.org, jgross@...e.com, x86@...nel.org,
	konrad.wilk@...cle.com, benh@...nel.crashing.org, mcgrof@...e.com,
	linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
	stefan.bader@...onical.com, luto@...capital.net,
	linux-mm@...ck.org, geert@...ux-m68k.org, ralf@...ux-mips.org,
	hmh@....eng.br, mpe@...erman.id.au, tj@...nel.org,
	paulus@...ba.org, kbuild test robot <fengguang.wu@...el.com>,
	hch@....de
Subject: Re: [PATCH v4 1/6] arch: unify ioremap prototypes and macro aliases

On Thu, 2015-06-11 at 17:19 -0400, Dan Williams wrote:
> Some archs define the first parameter to ioremap() as unsigned long,
> while the balance define it as resource_size_t.  Unify on
> resource_size_t to enable passing ioremap function pointers.  Also, some
> archs use function-like macros for defining ioremap aliases, but
> asm-generic/iomap.h expects object-like macros, unify on the latter.
> 
 :
> diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
> index 80a7e34be009..8588ef767a44 100644
> --- a/arch/ia64/include/asm/io.h
> +++ b/arch/ia64/include/asm/io.h
> @@ -424,8 +424,8 @@ __writeq (unsigned long val, volatile void __iomem *addr)
>  
>  # ifdef __KERNEL__
>  
> -extern void __iomem * ioremap(unsigned long offset, unsigned long size);
> -extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
> +extern void __iomem * ioremap(resource_size_t offset, unsigned long size);
> +extern void __iomem * ioremap_nocache (resource_size_t offset, unsigned long size);
>  extern void iounmap (volatile void __iomem *addr);
>  extern void __iomem * early_ioremap (unsigned long phys_addr, unsigned long size);
>  #define early_memremap(phys_addr, size)        early_ioremap(phys_addr, size)

This ia64 io.h also defines ioremap_cache().  Should this be also
changed to resource_size_t?

static inline void __iomem * ioremap_cache (unsigned long phys_addr,
unsigned long size)
{
	return ioremap(phys_addr, size);
}

-Toshi

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