Re: Add sparse "__iomem" infrastructure to check PCI address usage

[Jeff Garzik]

Linux Kernel Mailing List wrote:
> --- a/include/linux/compiler.h	2004-09-11 00:26:40 -07:00
> +++ b/include/linux/compiler.h	2004-09-11 00:26:40 -07:00
> @@ -6,13 +6,17 @@
>  # define __kernel	/* default address space */
>  # define __safe		__attribute__((safe))
>  # define __force	__attribute__((force))
> +# define __iomem	__attribute__((noderef, address_space(2)))

Dumb gcc attribute questions:

1) what does force do? it doesn't appear to be in gcc 3.3.3 docs.

2) is "volatile ... __force" redundant?

3) can we use 'malloc' attribute on kmalloc?

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