[PATCH v9 09/12] mm/kasan: kasan specific map populate function

Pavel Tatashin pasha.tatashin at oracle.com
Mon Oct 9 11:59:09 PDT 2017


Hi Will,

> We have two table walks even with your patch series applied afaict: one in
> our definition of vmemmap_populate (arch/arm64/mm/mmu.c) and this one
> in the core code.

I meant to say implementing two new page table walkers, not at runtime.

> My worry is that these are actually highly arch-specific, but will likely
> grow more users in mm/ that assume things for all architectures that aren't
> necessarily valid.

I see, how about moving new kasan_map_populate() implementation into
arch dependent code:

arch/x86/mm/kasan_init_64.c
arch/arm64/mm/kasan_init.c

This way we won't need to add pmd_large()/pud_large() macros for arm64?

Pavel



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