On Tue, 1 May 2007, Benjamin Herrenschmidt wrote:

>
>> At present, update_mmu_cache() and lazy_mmu_prot_update() are always
>> called when ptep_set_access_flags() is called so why not move them into
>> ptep_set_access_flags() and change ptep_set_access_flags() to have an
>> additional boolean parameter (__update) that would when set, cause
>> update_mmu_cache() and lazy_mmu_prot_update() to be called.
>
> Well, ptep_set_access_flags() is a low level arch hook, I'd rather not
> start hiding update_mmu_cache() calls in it ...
>
> Ben.
>
>

I have attached a patch (so pine does not mangle it) for linux-2.6.20.9.
Is this what you had in mind?

For linux-2.6.21, more work will be needed as it has more code calling 
ptep_set_access_flags.

Regards
 	Mark Fortescue.