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b=B3HQ7V1CoKgaBIoteEnZFo//C1eOjQmBzA363dlSZJSPGnKwrPagzWWRWHEyGkx/1 6MhwDWWeaCOz0KllZsOTIWSRv2FTaTTuUgO3maOmVNlVD3xKMqbal2bskvscPZ+Bhx 31nhkKYtbH0jAtANiQoO7gCBg3ymcBqFZCfessdQ= Date: Mon, 23 Feb 2026 10:13:35 -0800 From: Andrew Morton To: Alexander Gordeev Cc: Pasha Tatashin , linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org Subject: Re: [PATCH 1/4] mm/page_table_check: Pass mm_struct to pxx_user_accessible_page() Message-Id: <20260223101335.aa3696d86341260e03989ac0@linux-foundation.org> In-Reply-To: <68c2f6df2955033cbf1ccbd2b5c2816e72ac345c.1771845678.git.agordeev@linux.ibm.com> References: <68c2f6df2955033cbf1ccbd2b5c2816e72ac345c.1771845678.git.agordeev@linux.ibm.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Stat-Signature: 4xbxcj1d3spx4a4jd8pb4qo5hfufgzrr X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 7AD8B20016 X-HE-Tag: 1771870417-788195 X-HE-Meta: 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 /ZjjakwH QJnbB0aYi19c2hF26ZVh5n1/BRa7zfUF+iiL7MwUNE7P5TXCvM9oc78CtlM1H7P44A48JfN4tScY+745XrkvF2ymrWALFqT3ck/vRqLNNuoQN+3k0SS6JQ6v9TU4R9tqVvNJD7szraVvrNNdRwSSegYlRbZX7u6weADAwAzwZ2aXkLQRtuMb56j1ILhoiGDldlmItjgf7Ml8JlQtl26TXYZt9pa+3xFIra4qRZTzfbbZ2BYI7V9yEJXVA9WGswA/fX8u8U9NcZlHqS8+cXgyv2etLPaxX2G8LSzupnGEWDReBNnbzFhgipA/mp9BoCosI9HqAoo5g70vvgg4Rwm4EjYh2zKaS4IcrQT4a94Ox2br6+/r42f3zkoPJlBKIawZbzGp8 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 23 Feb 2026 12:53:13 +0100 Alexander Gordeev wrote: > From: Tobias Huschle > > Unlike other architectures, s390 does not have means to > distinguish kernel vs user page table entries - neither > an entry itself, nor the address could be used for that. > It is only the mm_struct that indicates whether an entry > in question is mapped to a user space. So pass mm_struct > to pxx_user_accessible_page() callbacks. > > ... > > arch/arm64/include/asm/pgtable.h | 6 +++--- > arch/riscv/include/asm/pgtable.h | 6 +++--- > arch/x86/include/asm/pgtable.h | 6 +++--- > mm/page_table_check.c | 15 ++++++--------- > 4 files changed, 15 insertions(+), 18 deletions(-) Reviewed-by: Andrew Morton I assume this can go into the s390 tree?