From: Sang-Heon Jeon <ekffu200098@gmail.com>
To: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>
Cc: Sang-Heon Jeon <ekffu200098@gmail.com>,
Alexander Potapenko <glider@google.com>,
Alexandre Ghiti <alex@ghiti.fr>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
kasan-dev@googlegroups.com, linux-riscv@lists.infradead.org,
Vincenzo Frascino <vincenzo.frascino@arm.com>
Subject: [PATCH 4/6] riscv: remove unreachable invalid range check in kasan_init()
Date: Sun, 21 Jun 2026 23:59:14 +0900 [thread overview]
Message-ID: <20260621145919.1453-5-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/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
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next prev parent reply other threads:[~2026-06-21 15:00 UTC|newest]
Thread overview: 5+ 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 ` [PATCH 3/6] riscv: remove unreachable invalid range check in create_linear_mapping_page_table() Sang-Heon Jeon
2026-06-22 5:10 ` Charlie Jenkins
2026-06-21 14:59 ` Sang-Heon Jeon [this message]
2026-06-22 5:11 ` [PATCH 4/6] riscv: remove unreachable invalid range check in kasan_init() Charlie Jenkins
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