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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-37d4f225870sm4544896a91.8.2026.06.21.07.59.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Jun 2026 07:59:32 -0700 (PDT) From: Sang-Heon Jeon To: Andrey Ryabinin , Catalin Marinas , Will Deacon Cc: Sang-Heon Jeon , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, Vincenzo Frascino Subject: [PATCH 1/6] arm64: mm: remove unreachable invalid range check in kasan_init_shadow() Date: Sun, 21 Jun 2026 23:59:11 +0900 Message-ID: <20260621145919.1453-2-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260621145919.1453-1-ekffu200098@gmail.com> References: <20260621145919.1453-1-ekffu200098@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260621_075934_197180_D1D57206 X-CRM114-Status: UNSURE ( 9.06 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org kasan_init_shadow() maps each memblock region 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 --- arch/arm64/mm/kasan_init.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c index 3fcad956fdf7..45fbdce684c8 100644 --- a/arch/arm64/mm/kasan_init.c +++ b/arch/arm64/mm/kasan_init.c @@ -353,9 +353,6 @@ static void __init kasan_init_shadow(void) void *start = (void *)__phys_to_virt(pa_start); void *end = (void *)__phys_to_virt(pa_end); - if (start >= end) - break; - kasan_map_populate((unsigned long)kasan_mem_to_shadow(start), (unsigned long)kasan_mem_to_shadow(end), early_pfn_to_nid(virt_to_pfn(start))); -- 2.43.0