Re: ioremap()/PCI sickness in 2.4.18-rc2 (FIXED ALMOST)

From: Richard Henderson (rth@twiddle.net)
Date: Fri Feb 22 2002 - 21:22:31 EST


On Fri, Feb 22, 2002 at 12:08:25PM +0100, Steffen Persvold wrote:
> I think you'll have to check again. In LP64 programming models (used on most
> 64-bit OS'es) 'long' is 64 bit. Thus a 'unsigned long' is always safe to use
> for pointer arithmetic since it will be 32 bit on 32bit machines and 64bit on
> 64bit machines.

This isn't something you should count on universally. There
are targets that have a 64-bit long, but a 32-bit pointer.

Seems unlikely to show up on linux, but...

r~
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Sat Feb 23 2002 - 21:00:48 EST