arm64: define __alloc_zeroed_user_highpage

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When running the kernel with init_on_alloc=1, calling the default
implementation of __alloc_zeroed_user_highpage() from include/linux/highmem.h
leads to double-initialization of the allocated page (first by the page
allocator, then by clear_user_page().
Calling alloc_page_vma() with __GFP_ZERO, similarly to e.g. x86, seems
to be enough to ensure the user page is zeroed only once.

Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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glider@google.com 2020-03-12 16:59:20 +01:00 • committed by Catalin Marinas

parent d22b115cbf

commit c17a290f7e

1 changed files with 4 additions and 0 deletions

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arch/arm64/include/asm/page.h

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