BACKPORT: FROMGIT: kasan, mm: only define ___GFP_SKIP_KASAN_POISON with HW_TAGS

(Backport: adapt the patch to account for __GFP_BITS_SHIFT changes.)

Only define the ___GFP_SKIP_KASAN_POISON flag when CONFIG_KASAN_HW_TAGS is
enabled.

This patch it not useful by itself, but it prepares the code for additions
of new KASAN-specific GFP patches.

Link: https://lkml.kernel.org/r/44e5738a584c11801b2b8f1231898918efc8634a.1643047180.git.andreyknvl@google.com


Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
(cherry picked from commit b3963a3ecc9b53c788f7f5d542110d0fd350967d
 git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

 akpm)
Bug: 217222520
Change-Id: Id971e37a04f138469b4a24cd5a87aeef4ab583c4
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>