On Wed 11-04-18 10:03:35, Laurent Dufour wrote: > Currently the PTE special supports is turned on in per architecture header > files. Most of the time, it is defined in arch/*/include/asm/pgtable.h > depending or not on some other per architecture static definition. > > This patch introduce a new configuration variable to manage this directly > in the Kconfig files. It would later replace __HAVE_ARCH_PTE_SPECIAL. > > Here notes for some architecture where the definition of > __HAVE_ARCH_PTE_SPECIAL is not obvious: > > arm > __HAVE_ARCH_PTE_SPECIAL which is currently defined in > arch/arm/include/asm/pgtable-3level.h which is included by > arch/arm/include/asm/pgtable.h when CONFIG_ARM_LPAE is set. > So select ARCH_HAS_PTE_SPECIAL if ARM_LPAE. > > powerpc > __HAVE_ARCH_PTE_SPECIAL is defined in 2 files: > - arch/powerpc/include/asm/book3s/64/pgtable.h > - arch/powerpc/include/asm/pte-common.h > The first one is included if (PPC_BOOK3S & PPC64) while the second is > included in all the other cases. > So select ARCH_HAS_PTE_SPECIAL all the time. > > sparc: > __HAVE_ARCH_PTE_SPECIAL is defined if defined(__sparc__) && > defined(__arch64__) which are defined through the compiler in > sparc/Makefile if !SPARC32 which I assume to be if SPARC64. > So select ARCH_HAS_PTE_SPECIAL if SPARC64 > > There is no functional change introduced by this patch. > > Suggested-by: Jerome Glisse <jglisse at redhat> > Reviewed-by: Jerome Glisse <jglisse at redhat> > Acked-by: David Rientjes <rientjes at google.com> > Signed-off-by: Laurent Dufour <ldufour at linux.vnet.ibm.com> Looks good to me. I have checked x86 and the generic code and it looks good to me. Anyway arch maintainers really have to double check this. -- Michal Hocko SUSE Labs
