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ARM: remove unreachable invalid range check in kasan_init()

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kasan_init() maps each memblock region with for_each_mem_range(), which
guarantees pa_start < pa_end. Then it skips any region with
pa_start >= arm_lowmem_limit, so pa_start < arm_lowmem_limit is guaranteed
as well.

When pa_end <= arm_lowmem_limit, pa_start < pa_end means start < end, so
the start >= end check is unreachable.

When pa_end > arm_lowmem_limit, end is clamped to __va(arm_lowmem_limit),
and pa_start < arm_lowmem_limit means start < end, so the check is
unreachable as well.

No functional change.

Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Link: https://patch.msgid.link/20260630150413.1718632-6-ekffu200098@gmail.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
This commit is contained in:
Sang-Heon Jeon 2026-07-01 00:04:10 +09:00 committed by Mike Rapoport (Microsoft)
parent 8008f6995d
commit 3db1a9ccf9
1 changed files with 0 additions and 6 deletions
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6
arch/arm/mm/kasan_init.c
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@ -262,12 +262,6 @@ void __init kasan_init(void)
&pa_start, &pa_end, &arm_lowmem_limit);
end = __va(arm_lowmem_limit);
}
if (start >= end) {
pr_info("Skipping invalid memory block %pa-%pa (virtual %p-%p)\n",
&pa_start, &pa_end, start, end);
continue;
}
create_mapping(start, end);
}