On Mon, 2018-02-05 at 19:14 -0200, Mauricio Faria de Oliveira wrote:
> Nick, Michael,
+Aneesh.
> On 02/05/2018 10:48 AM, Florian Weimer wrote:
> > 7041 set_robust_list(0x7fff93dc3980, 24) = -1 ENOSYS (Function not
> > implemented)
>
> The regression was introduced by commit 371b8044 ("powerpc/64s:
> Initialize ISAv3 MMU registers before setting partition table").
>
> The problem is Radix MMU specific (does not occur with 'disable_radix'),
> and does not occur with that code reverted (ie do not set PIDR to zero).
>
> Do you see any reasons why?
> (wondering if at all related to access_ok() in include/asm/uaccess.h)
>
> with:
>
> # strace -e set_robust_list -f ./test
> set_robust_list(0x7fffa4b03910, 24) = -1 ENOSYS (Function not
> implemented)
> +++ exited with 1 +++
>
> # uname -r
> 4.15.0
>
> without:
>
> # strace -e set_robust_list -f ./test
> set_robust_list(0x7fff889c3910, 24) = 0
> +++ exited with 0 +++
>
> # uname -r
> 4.15.0.nopidr
