On Sat, 2009-02-07 at 00:22 -0800, David Miller wrote:
> From: Benjamin Herrenschmidt
> Date: Mon, 02 Feb 2009 11:10:24 +1100
>
> > +/* has to be a macro because of include dependencies */
> > +static inline int is_exec_fault(void)
> > +{
> > + return current->thread.regs && TRAP(current->threa
From: Benjamin Herrenschmidt
Date: Mon, 02 Feb 2009 11:10:24 +1100
> +/* has to be a macro because of include dependencies */
> +static inline int is_exec_fault(void)
> +{
> + return current->thread.regs && TRAP(current->thread.regs) == 0x400;
> +}
Nice macro :-)
This patch reworks the way we do I and D cache coherency on PowerPC.
The "old" way was split in 3 different parts depending on the processor type:
- Hash with per-page exec support (64-bit and >= POWER4 only) does it
at hashing time, by preventing exec on unclean pages and cleaning pages
on ex
