Re: [PATCH 0/6] treewide: remove unnecessary invalid range checks in memblock iteration loops

From: Mike Rapoport <rppt@kernel.org>
To: Sang-Heon Jeon <ekffu200098@gmail.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andrey Ryabinin <ryabinin.a.a@gmail.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Huacai Chen <chenhuacai@kernel.org>,
	Muchun Song <muchun.song@linux.dev>,
	Oscar Salvador <osalvador@suse.de>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <pjw@kernel.org>, Will Deacon <will@kernel.org>,
	Alexander Potapenko <glider@google.com>,
	Alexandre Ghiti <alex@ghiti.fr>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	David Hildenbrand <david@kernel.org>,
	Dmitry Vyukov <dvyukov@google.com>,
	kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org,
	linux-mm@kvack.org, linux-riscv@lists.infradead.org,
	loongarch@lists.linux.dev,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	WANG Xuerui <kernel@xen0n.name>
Subject: Re: [PATCH 0/6] treewide: remove unnecessary invalid range checks in memblock iteration loops
Date: Fri, 26 Jun 2026 11:23:05 +0300	[thread overview]
Message-ID: <aj426bA-YiOKt06m@kernel.org> (raw)
In-Reply-To: <20260621145919.1453-1-ekffu200098@gmail.com>

On Sun, Jun 21, 2026 at 11:59:10PM +0900, Sang-Heon Jeon wrote:
> The memblock API guarantees that for_each_mem_range() and
> for_each_mem_pfn_range() never return an invalid range, meaning start is
> always less than end.
> 
> Several memblock callers still have unnecessary invalid range checks in
> their loop bodies, so remove them.
> 
> Sang-Heon Jeon (6):
>   arm64: mm: remove unreachable invalid range check in
>     kasan_init_shadow()
>   LoongArch: remove unreachable invalid range check in kasan_init()
>   riscv: remove unreachable invalid range check in
>     create_linear_mapping_page_table()
>   riscv: remove unreachable invalid range check in kasan_init()
>   mm: remove unnecessary empty range check in
>     early_calculate_totalpages()
>   mm/hugetlb: remove unnecessary empty range check in
>     hugetlb_bootmem_set_nodes()

I queued this for inclusion into memblock tree.

>  arch/arm64/mm/kasan_init.c     | 3 ---
>  arch/loongarch/mm/kasan_init.c | 3 ---
>  arch/riscv/mm/init.c           | 2 --
>  arch/riscv/mm/kasan_init.c     | 3 ---
>  mm/hugetlb.c                   | 3 +--
>  mm/mm_init.c                   | 3 +--
>  6 files changed, 2 insertions(+), 15 deletions(-)
> 
> -- 
> 2.43.0
> 

-- 
Sincerely yours,
Mike.