[PATCH v3 04/13] arm64: mm: Remove bogus stop condition from map_mem() loop

Ard Biesheuvel
2026-03-20T15:00:04Z

The memblock API guarantees that start is not greater than or equal to
end, so there is no need to test it. And if were, it is doubtful that
breaking out of the loop would be a reasonable course of action here
(rather than attempting to map the remaining regions)

So let's drop this check.

Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/arm64/mm/mmu.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 7f7d63009440..652fe2c52b5a 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1157,8 +1157,6 @@ static void __init map_mem(pgd_t *pgdp)

/* map all the memory banks */
for_each_mem_range(i, &start, &end) {
- if (start >= end)
- break;
/*
* The linear map must allow allocation tags reading/writing
* if MTE is present. Otherwise, it has the same attributes as
--
2.53.0.959.g497ff81fa9-goog