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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ca37a70bc0sm16250465ad.10.2026.06.30.08.04.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jun 2026 08:04:50 -0700 (PDT) From: Sang-Heon Jeon To: rppt@kernel.org, Andrey Ryabinin , Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: linux-mm@kvack.org, Sang-Heon Jeon , Alexander Potapenko , Alexandre Ghiti , Andrey Konovalov , Dmitry Vyukov , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Vincenzo Frascino , Charlie Jenkins Subject: [PATCH v3 4/8] riscv: remove unreachable invalid range check in kasan_init() Date: Wed, 1 Jul 2026 00:04:09 +0900 Message-ID: <20260630150413.1718632-5-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260630150413.1718632-1-ekffu200098@gmail.com> References: <20260630150413.1718632-1-ekffu200098@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: py6yz33e6pj5t6c5fpgod5bopz5r9441 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 5833EC0012 X-HE-Tag: 1782831892-79552 X-HE-Meta: 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 Ct4xzW8e 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: kasan_init() populates the linear mapping shadow with for_each_mem_range() and breaks the loop when start >= end. for_each_mem_range() never returns an invalid range, so start < end always. Therefore the start >= end check is unreachable, so remove it. No functional change. Signed-off-by: Sang-Heon Jeon Reviewed-by: Charlie Jenkins Tested-by: Charlie Jenkins Reviewed-by: Andrey Ryabinin --- arch/riscv/mm/kasan_init.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c index c4a2a9e5586e..1f3aa9611187 100644 --- a/arch/riscv/mm/kasan_init.c +++ b/arch/riscv/mm/kasan_init.c @@ -512,9 +512,6 @@ void __init kasan_init(void) void *start = (void *)__va(p_start); void *end = (void *)__va(p_end); - if (start >= end) - break; - kasan_populate(kasan_mem_to_shadow(start), kasan_mem_to_shadow(end)); } -- 2.43.0