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Date: Fri, 9 Jan 2026 10:21:00 +0200
From: Mike Rapoport <rppt@kernel.org>
To: Lain Fearyncess Yang <fearyncess@aosc.io>
Cc: Huacai Chen <chenhuacai@kernel.org>, WANG Xuerui <kernel@xen0n.name>,
	Kexy Biscuit <kexybiscuit@aosc.io>, Mingcong Bai <jeffbai@aosc.io>,
	Andrew Morton <akpm@linux-foundation.org>,
	David Hildenbrand <david@kernel.org>,
	Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
	"Liam R. Howlett" <Liam.Howlett@oracle.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	Suren Baghdasaryan <surenb@google.com>,
	Michal Hocko <mhocko@suse.com>, Shuah Khan <shuah@kernel.org>,
	Paul Walmsley <pjw@kernel.org>, Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>, Alexandre Ghiti <alex@ghiti.fr>,
	Arnd Bergmann <arnd@arndb.de>,
	Jiaxun Yang <jiaxun.yang@flygoat.com>, loongarch@lists.linux.dev,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-kselftest@vger.kernel.org, linux-riscv@lists.infradead.org
Subject: Re: [PATCH] loongarch: wire up memfd_secret system call
Message-ID: <aWC6bIEg6UqvX1DO@kernel.org>
References: <20260109051054.188030-1-fearyncess@aosc.io>
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In-Reply-To: <20260109051054.188030-1-fearyncess@aosc.io>

On Fri, Jan 09, 2026 at 01:10:51PM +0800, Lain Fearyncess Yang wrote:
> From: "Lain \"Fearyncess\" Yang" <fearyncess@aosc.io>
> 
> LoongArch supports ARCH_HAS_SET_DIRECT_MAP, therefore wire up the
> memfd_secret system call, which depends on it.

LoongArch version of set_memory* does not support splitting of leaf PMD
entries. Does LoongArch always use PTE-level mappings in the direct map?
 
> Signed-off-by: Lain "Fearyncess" Yang <fearyncess@aosc.io>
> ---
>  arch/loongarch/include/asm/unistd.h     | 1 +
>  arch/loongarch/kernel/Makefile.syscalls | 6 +++---
>  tools/testing/selftests/mm/Makefile     | 2 +-
>  3 files changed, 5 insertions(+), 4 deletions(-)

-- 
Sincerely yours,
Mike.