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From: Sang-Heon Jeon <ekffu200098@gmail.com>
To: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
	Huacai Chen <chenhuacai@kernel.org>
Cc: Sang-Heon Jeon <ekffu200098@gmail.com>,
	Alexander Potapenko <glider@google.com>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	kasan-dev@googlegroups.com, loongarch@lists.linux.dev,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	WANG Xuerui <kernel@xen0n.name>
Subject: [PATCH 2/6] LoongArch: remove unreachable invalid range check in kasan_init()
Date: Sun, 21 Jun 2026 23:59:12 +0900	[thread overview]
Message-ID: <20260621145919.1453-3-ekffu200098@gmail.com> (raw)
In-Reply-To: <20260621145919.1453-1-ekffu200098@gmail.com>

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 <ekffu200098@gmail.com>
---
 arch/loongarch/mm/kasan_init.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/loongarch/mm/kasan_init.c b/arch/loongarch/mm/kasan_init.c
index 0fc02ca06457..92ca0ba86406 100644
--- a/arch/loongarch/mm/kasan_init.c
+++ b/arch/loongarch/mm/kasan_init.c
@@ -305,9 +305,6 @@ void __init kasan_init(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)mem_to_shadow(start),
 			(unsigned long)mem_to_shadow(end), NUMA_NO_NODE);
 	}
-- 
2.43.0


  reply	other threads:[~2026-06-21 14:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-21 14:59 [PATCH 0/6] treewide: remove unnecessary invalid range checks in memblock iteration loops Sang-Heon Jeon
2026-06-21 14:59 ` Sang-Heon Jeon [this message]
2026-06-22 16:52   ` [PATCH 2/6] LoongArch: remove unreachable invalid range check in kasan_init() Andrey Ryabinin
2026-06-25  8:46 ` [PATCH 0/6] treewide: remove unnecessary invalid range checks in memblock iteration loops Mike Rapoport
2026-06-26  8:23 ` Mike Rapoport
2026-06-26 10:59   ` Sang-Heon Jeon
2026-06-29 11:43     ` Mike Rapoport
2026-06-29 16:48       ` Sang-Heon Jeon

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