On Fri, Oct 25, 2019 at 10:24:30AM +0200, Michal Simek wrote:

Hi Mike,

On 23. 10. 19 11:28, Mike Rapoport wrote:

quoted

From: Mike Rapoport <redacted>

microblaze has only two-level page tables and can use pgtable-nopmd and
folding of the upper layers.

Replace usage of include/asm-generic/4level-fixup.h and explicit definition
of __PAGETABLE_PMD_FOLDED in microblaze with
include/asm-generic/pgtable-nopmd.h and adjust page table manipulation
macros and functions accordingly.

Signed-off-by: Mike Rapoport <redacted>
---
 arch/microblaze/include/asm/page.h    |  3 ---
 arch/microblaze/include/asm/pgalloc.h | 16 ----------------
 arch/microblaze/include/asm/pgtable.h | 32 ++------------------------------
 arch/microblaze/kernel/signal.c       | 10 +++++++---
 arch/microblaze/mm/init.c             |  7 +++++--
 arch/microblaze/mm/pgtable.c          | 13 +++++++++++--
 6 files changed, 25 insertions(+), 56 deletions(-)

I have take a look at this and when this is applied on the top of
5.4-rc2 there is not a problem.
But as was reported by 0-day there is compilation issue on the top of
mmotm/master tree and I am able to replicate it.
It means there are other changes in Andrew's tree which are causing it.

0day is still using an old tree for mmotm:

url:    https://github.com/0day-ci/linux/commits/Mike-Rapoport/mm-remove-__ARCH_HAS_4LEVEL_HACK/20191025-063009
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: microblaze-mmu_defconfig (attached as .config)

A while ago Johannes moved the mmotm to github and the last commit in
git.cmpxchg.org/linux-mmotm.git was in the end of August.

[1] https://lore.kernel.org/linux-mm/20190916134327.GC29985@cmpxchg.org (local)
 

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs

-- 
Sincerely yours,
Mike.

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