Re: [PATCH 04 of 32] update futex compound knowledge

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On Mon, 2010-03-01 at 18:58 +0100, Andrea Arcangeli wrote:
> 
> But nothing risks to break at build time, simply any arch with
> transparent hugepage support also has to implement
> __get_user_pages_fast. Disabling irq and using __get_user_pages_fast
> looked the best way to serialize against split_huge_page here (rather
> than taking locks). 

PowerPC uses rcu-free'd pagetables for gup_fast() iirc, so no need to
disable IRQs there.

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