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SubjectRe: [PATCH 1 of 4] mm: add a ptep_modify_prot transaction abstraction

On Mon, 16 Jun 2008, Jeremy Fitzhardinge wrote:
> ptep_modify_prot_start() returns the current pte value, and puts the
> pte entry into a state where either the hardware will not update the
> pte, or if it does, the updates will be preserved on commit.
> ptep_modify_prot_commit() writes back the updated pte, makes sure that
> any hardware updates made since ptep_modify_prot_start() are
> preserved.

Ok, I'm fine with this now that it's renamed to be clearly about just
protection bits.


Acked-by: Linus Torvalds <>

for what it's worth.


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