kasan: clean up feature flags for HW_TAGS mode

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- Untie kasan_init_hw_tags() code from the default values of
   kasan_arg_mode and kasan_arg_stacktrace.

 - Move static_branch_enable(&kasan_flag_enabled) to the end of
   kasan_init_hw_tags_cpu().

 - Remove excessive comments in kasan_arg_mode switch.

 - Add new comments.

Link: https://lkml.kernel.org/r/76ebb340265be57a218564a497e1f52ff36a3879.1643047180.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: Linus Torvalds <torvalds@linux-foundation.org>

...

This commit is contained in:

Andrey Konovalov 2022-03-24 18:11:44 -07:00 • committed by Linus Torvalds

parent 1eeac51e62

commit 241944d162

2 changed files with 22 additions and 18 deletions

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38

mm/kasan/hw_tags.c

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2

mm/kasan/kasan.h

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