[PATCH v16 07/16] mm, arm64: untag user pointers in get_vaddr_frames
catalin.marinas at arm.com
Mon Jun 10 14:29:34 UTC 2019
On Mon, Jun 03, 2019 at 06:55:09PM +0200, Andrey Konovalov wrote:
> This patch is a part of a series that extends arm64 kernel ABI to allow to
> pass tagged user pointers (with the top byte set to something else other
> than 0x00) as syscall arguments.
> get_vaddr_frames uses provided user pointers for vma lookups, which can
> only by done with untagged pointers. Instead of locating and changing
> all callers of this function, perform untagging in it.
> Signed-off-by: Andrey Konovalov <andreyknvl at google.com>
Acked-by: Catalin Marinas <catalin.marinas at arm.com>
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