On 07/19/2012 09:41 PM, H Hartley Sweeten wrote:
> Hello all,
>
> Does anyone know what the difference is between inb_p and inb?
>
> include/asm-generic/io.h has this:
>
> #define inb_p(addr) inb(addr)
> #define inw_p(addr) inw(addr)
> #define inl_p(addr) inl(addr)
There might be a difference for m32r
arch/m32r/include/asm/io.h:
#define inb_p _inb_p
arch/m32r/platforms/mappi3/io.c:
unsigned char _inb_p(unsigned long port)
{
unsigned char v = _inb(port);
delay();
return (v);
}
> #define outb_p(x, addr) outb((x), (addr))
> #define outw_p(x, addr) outw((x), (addr))
> #define outl_p(x, addr) outl((x), (addr))
>
> So they appear to be equivalent but I want to make sure I'm
> not missing something.
>
> Regards,
> Hartley
>
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