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Fri, 28 Nov 2025 03:34:00 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.7]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 3203D19560B0; Fri, 28 Nov 2025 03:33:52 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, andreyknvl@gmail.com, glider@google.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, elver@google.com, sj@kernel.org, lorenzo.stoakes@oracle.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Baoquan He Subject: [PATCH v4 03/12] mm/kasan/sw_tags: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:11 +0800 Message-ID: <20251128033320.1349620-4-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 474CBC0014 X-Stat-Signature: ipp5xgsyodaq7sycgdi959htapu3wjse X-Rspam-User: X-HE-Tag: 1764300847-952429 X-HE-Meta: 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 +EMOHcm7 +ZLyJqNfIdkbYH3J8vp3ttdFgQIWwOp3DealjZ2AtsTQGwb33KFiu7islLbU5KwHPbRNJdNxu7Fw0NVDdlCz3RD/Xyrl0Nd415ULBmhUp5UNpuCdsdW92zUmfkSgmBTlvQ5ow8caiFGsBE0L3GueklZHs8w2pZQCXcRJKTG7BGWudx9yE8WYKgVOxHArxsxwfP5591mHl5XjKKDJMJIRhVqwilRTSY8MaN6chJhHXMku1F4TkhQMMsYjyXXjJvsjzdi+jJ3kkpzNi/sdXQHIaYv4ifW2wF66WxhrhIIKniNHmLCzDsANwBL3nIXzILeHWCK5jXFxYUDwcsChgzCTYBwDEMyqahsP0rcqiPjjNFfR5ifT4EsEdbu2W5KBOU9j2dAJ+HbCzDk37rtf8/RWQFrnUEUu+seJms9ok8SFkAkTOuGOrgwRyB4Y/carusv4+ZWI3sem85yuhuSg= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Signed-off-by: Baoquan He --- mm/kasan/sw_tags.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/kasan/sw_tags.c b/mm/kasan/sw_tags.c index 6c1caec4261a..58edb68efc09 100644 --- a/mm/kasan/sw_tags.c +++ b/mm/kasan/sw_tags.c @@ -40,6 +40,9 @@ void __init kasan_init_sw_tags(void) { int cpu; + if (kasan_arg_disabled) + return; + for_each_possible_cpu(cpu) per_cpu(prng_state, cpu) = (u32)get_cycles(); -- 2.41.0