Re: [PATCH v2 04/32] mm/pgtable: allow pte_offset_map[_lock]() to fail

[John Hubbard]

On 8/5/23 10:07, Matthew Wilcox wrote:
...
> > Sorry, I am not able to give any explanation here,
> > I am not familiar with the pvrsrvkm source, I just use it to have one
> > working AOSP build.
> >
> > here is the source file where pte_offset_map_lock is called,
> >      https://android-git.linaro.org/kernel/omap-modules.git/tree/pvr/services4/srvkm/env/linux/osfunc.c?h=android-mainline#n3508
> > in case you could know something with a quick look.
>
> Isn't this just get_user_pages()?


Or even just follow_page(), which looks like a nearly perfect drop-in
replacement, especially since that android link also says, "The page in
question must be present (i.e. no fault handling required)".


thanks,
--
John Hubbard
NVIDIA