[PATCH] powerpc: Only make kernel text pages of linear mapping executable

[Benjamin Herrenschmidt]

On Thu, 2008-08-28 at 16:38 +1000, Paul Mackerras wrote:
> Commit bc033b63bbfeb6c4b4eb0a1d083c650e4a0d2af8 ("powerpc/mm: Fix
> attribute confusion with htab_bolt_mapping()") moved the check for
> whether we should make pages of the linear mapping executable from
> htab_bolt_mapping into its callers, including htab_initialize.
> A side-effect of this is that the decision is now made once for
> each contiguous section in the LMB array rather than for each page
> individually.  This can often mean that the whole of the linear
> mapping ends up being executable.
> 
> This reverts to the previous behaviour, where individual pages are
> checked for being part of the kernel text or not, by moving the check
> back down into htab_bolt_mapping.
> 
> Signed-off-by: Paul Mackerras <paulus at samba.org>

Acked-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>