[Qemu-devel] Re: [PATCH 1/3] kvm-unit-tests: add x86 port io accessors

[Avi Kivity]

On 02/24/2011 11:48 PM, Anthony Liguori wrote:
> Signed-off-by: Anthony Liguori<address@hidden>
>
> diff --git a/lib/x86/io.h b/lib/x86/io.h
> new file mode 100644
> index 0000000..bd6341c
> --- /dev/null
> +++ b/lib/x86/io.h
> @@ -0,0 +1,40 @@
> +#ifndef IO_H
> +#define IO_H
> +
> +static inline unsigned char inb(unsigned short port)
> +{
> +    unsigned char value;
> +    asm volatile("inb %w1, %0" : "=a" (value) : "Nd" (port));
> +    return value;
> +}

Are those %[wb] really needed?  gcc should do the right thing based on 
the argument type.

Might as well put all of that into processor.h.

--
error compiling committee.c: too many arguments to function