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Thu, 04 Dec 2025 08:40:42 -0800 (PST) MIME-Version: 1.0 References: <20251128033320.1349620-1-bhe@redhat.com> <20251128033320.1349620-4-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-4-bhe@redhat.com> From: Andrey Konovalov Date: Thu, 4 Dec 2025 17:40:29 +0100 X-Gm-Features: AWmQ_bnAHBHdMEtZR2H-axXWT-9zuGdxSA8XYx7l16HmfMLSXrkVqTo9q2sNGCg Message-ID: Subject: Re: [PATCH v4 03/12] mm/kasan/sw_tags: don't initialize kasan if it's disabled To: Baoquan He Cc: linux-mm@kvack.org, ryabinin.a.a@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 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 5BD4F1A0011 X-Stat-Signature: wpsw1huu3ct6anrkcq4fjfkuak8za5ms X-Rspam-User: X-HE-Tag: 1764866444-169487 X-HE-Meta: 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 WQGkutkO 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 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: On Fri, Nov 28, 2025 at 4:34=E2=80=AFAM Baoquan He wrote: > This commit message is too empty :) > 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; > Here and in other places where you check this flag, add a comment: "If KASAN is disabled via command line, don't initialize it.". > + if (kasan_arg_disabled) > + return; > + > for_each_possible_cpu(cpu) > per_cpu(prng_state, cpu) =3D (u32)get_cycles(); > > -- > 2.41.0 >