Nick, Michael,
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
