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Date: Mon, 10 Aug 2015 11:31:12 +0530 From: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com> To: Andrey Ryabinin <a.ryabinin@...sung.com>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, linux-arm-kernel@...ts.infradead.org Cc: Arnd Bergmann <arnd@...db.de>, Linus Walleij <linus.walleij@...aro.org>, David Keitel <dkeitel@...eaurora.org>, Alexander Potapenko <glider@...gle.com>, Andrew Morton <akpm@...ux-foundation.org>, Dmitry Vyukov <dvyukov@...gle.com>, linux-mm@...ck.org, linux-kernel@...r.kernel.org, Alexey Klimov <klimov.linux@...il.com>, Andrey Ryabinin <a.ryabinin@...sung.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org Subject: Re: [PATCH v4 2/7] mm: kasan: introduce generic kasan_populate_zero_shadow() Andrey Ryabinin <a.ryabinin@...sung.com> writes: > Introduce generic kasan_populate_zero_shadow(start, end). > This function maps kasan_zero_page to the [start, end] addresses. > > In follow on patches it will be used for ARMv8 (and maybe other > architectures) and will replace x86_64 specific populate_zero_shadow(). > > Signed-off-by: Andrey Ryabinin <a.ryabinin@...sung.com> This assume that we can have shared pgtable_t in generic code ? Is that true for generic code ? Even if it is we may want to allow some arch to override this ? On ppc64, we store the hardware hash page table slot number in pte_t, Hence we won't be able to share pgtable_t. > --- > arch/x86/mm/kasan_init_64.c | 14 ---- > include/linux/kasan.h | 8 +++ > mm/kasan/Makefile | 2 +- > mm/kasan/kasan_init.c | 151 ++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 160 insertions(+), 15 deletions(-) > create mode 100644 mm/kasan/kasan_init.c > > diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c > index e1840f3..812086c 100644 > --- a/arch/x86/mm/kasan_init_64.c > +++ b/arch/x86/mm/kasan_init_64.c > @@ -12,20 +12,6 @@ > extern pgd_t early_level4_pgt[PTRS_PER_PGD]; > extern struct range pfn_mapped[E820_X_MAX]; > > -static pud_t kasan_zero_pud[PTRS_PER_PUD] __page_aligned_bss; > -static pmd_t kasan_zero_pmd[PTRS_PER_PMD] __page_aligned_bss; > -static pte_t kasan_zero_pte[PTRS_PER_PTE] __page_aligned_bss; > - > -/* -aneesh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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