From: Sang-Heon Jeon <ekffu200098@gmail.com>
To: Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>
Cc: Sang-Heon Jeon <ekffu200098@gmail.com>,
Alexandre Ghiti <alex@ghiti.fr>,
linux-riscv@lists.infradead.org
Subject: [PATCH 3/6] riscv: remove unreachable invalid range check in create_linear_mapping_page_table()
Date: Sun, 21 Jun 2026 23:59:13 +0900 [thread overview]
Message-ID: <20260621145919.1453-4-ekffu200098@gmail.com> (raw)
In-Reply-To: <20260621145919.1453-1-ekffu200098@gmail.com>
create_linear_mapping_page_table() iterates memblock regions 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/init.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 5b1b3c88b4d1..eb93c2ac05a6 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -1229,8 +1229,6 @@ static void __init create_linear_mapping_page_table(void)
/* Map all memory banks in the linear mapping */
for_each_mem_range(i, &start, &end) {
- if (start >= end)
- break;
if (start <= __pa(PAGE_OFFSET) &&
__pa(PAGE_OFFSET) < end)
start = __pa(PAGE_OFFSET);
--
2.43.0
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next prev parent reply other threads:[~2026-06-21 14:59 UTC|newest]
Thread overview: 6+ 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 5:10 ` [PATCH 3/6] riscv: remove unreachable invalid range check in create_linear_mapping_page_table() Charlie Jenkins
2026-06-21 14:59 ` [PATCH 4/6] riscv: remove unreachable invalid range check in kasan_init() Sang-Heon Jeon
2026-06-22 5:11 ` Charlie Jenkins
2026-06-22 16:53 ` Andrey Ryabinin
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