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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ca37a70bc0sm16250465ad.10.2026.06.30.08.04.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jun 2026 08:04:35 -0700 (PDT) From: Sang-Heon Jeon To: rppt@kernel.org, Andrey Ryabinin , Catalin Marinas , Will Deacon Cc: linux-mm@kvack.org, Sang-Heon Jeon , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Vincenzo Frascino Subject: [PATCH v3 1/8] arm64: mm: remove unreachable invalid range check in kasan_init_shadow() Date: Wed, 1 Jul 2026 00:04:06 +0900 Message-ID: <20260630150413.1718632-2-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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Andrey Ryabinin --- 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