> >access_ok() always returns 1.
>
> Thanks for pointing it out. And, I didn't notice that gup is just built for
> SPARC64. I though it is built by both 64 bit and 32 bit.
>
> A follow-up question, is there any reason to just have sparc specific fast
> gup for 64 bit not for 32 bit?
I do not know
On 12/3/2015 12:38 PM, Sam Ravnborg wrote:
Hi Yang.
On Wed, Nov 25, 2015 at 02:45:43PM -0800, Yang Shi wrote:
Check if user address is accessible in atomic version __get_user_pages_fast()
before walking the page table.
And, check if end > start in get_user_pages_fast(), otherwise fallback to sl
Hi Yang.
On Wed, Nov 25, 2015 at 02:45:43PM -0800, Yang Shi wrote:
> Check if user address is accessible in atomic version __get_user_pages_fast()
> before walking the page table.
> And, check if end > start in get_user_pages_fast(), otherwise fallback to slow
> path.
Two different but related th
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