On Tue, 13 Aug 2019, Paul Walmsley wrote: > On Tue, 13 Aug 2019, Logan Gunthorpe wrote: > > > On 2019-08-13 12:04 a.m., Greentime Hu wrote: > > > > > Every architecture with mmu defines their own pfn_valid(). > > > > Not true. Arm64, for example just uses the generic implementation in > > mmzone.h. > > arm64 seems to define their own: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/Kconfig#n899 > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/mm/init.c#n235 > > While there are many architectures which have their own pfn_valid(); > oddly, almost none of them set HAVE_ARCH_PFN_VALID ? (fixed the linux-mm@ address) - Paul
