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Subject[RFC][PATCH 0/3] pgtable bytes mis-accounting v2

the first test patch to fix the pgtable_bytes mis-accounting on s390
still had a few problems. For one it didn't work for x86 ..

Changes v1 -> v2:

- Split the patch into three parts, one patch to add the mm_pxd_folded
helpers, one patch to use to the helpers in mm_[dec|inc]_nr_[pmds|puds]
and finally the fix for s390.

- Drop the use of __is_defined, it does not work with the

- Do not change the basic #ifdef'ery in mm.h, just add the calls
to mm_pxd_folded to the pgtable_bytes accounting functions. This
fixes the compile error on alpha (and potentially on other archs).

Martin Schwidefsky (3):
mm: introduce mm_[p4d|pud|pmd]_folded
mm: add mm_pxd_folded checks to pgtable_bytes accounting functions
s390/mm: fix mis-accounting of pgtable_bytes

arch/s390/include/asm/mmu_context.h | 5 ----
arch/s390/include/asm/pgalloc.h | 6 ++---
arch/s390/include/asm/pgtable.h | 18 ++++++++++++++
arch/s390/include/asm/tlb.h | 6 ++---
include/linux/mm.h | 48 +++++++++++++++++++++++++++++++++++++
5 files changed, 72 insertions(+), 11 deletions(-)


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