| Date | Tue, 21 Dec 2021 13:11:56 +0100 | From | Marco Elver <> | Subject | Re: [PATCH mm v4 29/39] kasan, page_alloc: allow skipping memory init for HW_TAGS |
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On Mon, Dec 20, 2021 at 11:02PM +0100, andrey.konovalov@linux.dev wrote: > From: Andrey Konovalov <andreyknvl@google.com> [...] > +static inline bool should_skip_init(gfp_t flags) > +{ > + /* Don't skip if a software KASAN mode is enabled. */ > + if (IS_ENABLED(CONFIG_KASAN_GENERIC) || > + IS_ENABLED(CONFIG_KASAN_SW_TAGS)) > + return false; > + > + /* Don't skip, if hardware tag-based KASAN is not enabled. */ > + if (!kasan_hw_tags_enabled()) > + return false;
Why is the IS_ENABLED(CONFIG_KASAN_{GENERIC,SW_TAGS}) check above required? Isn't kasan_hw_tags_enabled() always false if one of those is configured?
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