[+Arnd in case he's interested in this series]
On Mon, Jun 15, 2020 at 12:57:55PM +0000, Christophe Leroy wrote:
> Commit 2ab3a0a02905 ("READ_ONCE: Enforce atomicity for
> {READ,WRITE}_ONCE() memory accesses") leads to following build
> failure on powerpc 8xx.
>
> To fix it, this small series introduces a new helper named ptep_get()
> to replace the direct access with READ_ONCE(). This new helper
> can be overriden by architectures.
Thanks for doing this, and sorry for the breakage. For the series:
Acked-by: Will Deacon <will@xxxxxxxxxx>
Hopefully we can introduce accessors for the other page-table levels too,
but that can obviously happen incrementally.
Will
> Christophe Leroy (3):
> mm/gup: Use huge_ptep_get() in gup_hugepte()
> mm: Allow arches to provide ptep_get()
> powerpc/8xx: Provide ptep_get() with 16k pages
>
> arch/powerpc/include/asm/nohash/32/pgtable.h | 10 ++++++++++
> include/asm-generic/hugetlb.h | 2 +-
> include/linux/pgtable.h | 7 +++++++
> mm/gup.c | 4 ++--
> 4 files changed, 20 insertions(+), 3 deletions(-)
>
> --
> 2.25.0
>
