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From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Yoshinori Sato <ysato@users.sourceforge.jp>,
	 Rich Felker <dalias@libc.org>,
	 John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	 Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	 Andrii Nakryiko <andrii@kernel.org>,
	 Martin KaFai Lau <martin.lau@linux.dev>,
	 Eduard Zingerman <eddyz87@gmail.com>,
	 Kumar Kartikeya Dwivedi <memxor@gmail.com>,
	Song Liu <song@kernel.org>,
	 Yonghong Song <yonghong.song@linux.dev>,
	Jiri Olsa <jolsa@kernel.org>,
	 Andrew Morton <akpm@linux-foundation.org>,
	Lorenzo Stoakes <ljs@kernel.org>,
	 Vlastimil Babka <vbabka@kernel.org>,
	Mike Rapoport <rppt@kernel.org>,
	 Suren Baghdasaryan <surenb@google.com>,
	Michal Hocko <mhocko@suse.com>,  Rik van Riel <riel@surriel.com>,
	Harry Yoo <harry@kernel.org>,  Jann Horn <jannh@google.com>,
	Matthew Wilcox <willy@infradead.org>,
	 "Liam R. Howlett" <liam@infradead.org>
Cc: linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org,
	 bpf@vger.kernel.org, linux-mm@kvack.org,
	 "David Hildenbrand (Arm)" <david@kernel.org>
Subject: [PATCH 0/3] mm: remove page_mapped()
Date: Mon, 27 Apr 2026 13:43:13 +0200	[thread overview]
Message-ID: <20260427-page_mapped-v1-0-e89c3592c74c@kernel.org> (raw)

While preparing my slides for an LSF/MM talk, I realized that I did not
yet remove page_mapped().

So let's do that. In the BPF arena code it's unclear which memdesc we
would want to allocate in the future: certainly something with a
refcount, but likely none with a mapcount. So let's just rely on
the page refcount instead to decide whether we want to try zapping the
page from user page tables.

Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
---
David Hildenbrand (Arm) (3):
      sh: use folio_mapped() instead of page_mapped() in sh4_flush_cache_page()
      bpf: arena: use page_ref_count() instead of page_mapped() in arena_free_pages()
      mm: remove page_mapped()

 arch/sh/mm/cache-sh4.c |  2 +-
 include/linux/mm.h     | 10 ----------
 kernel/bpf/arena.c     |  2 +-
 mm/memory.c            |  2 +-
 mm/rmap.c              |  8 ++++----
 5 files changed, 7 insertions(+), 17 deletions(-)

---

base-commit: a2ddbfd1af0f54ea84bf17f0400088815d012e8d

change-id: 20260422-page_mapped-a49a892fa432

--

Cheers,

David



             reply	other threads:[~2026-04-27 11:43 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-27 11:43 David Hildenbrand (Arm) [this message]
2026-04-27 11:43 ` [PATCH 1/3] sh: use folio_mapped() instead of page_mapped() in sh4_flush_cache_page() David Hildenbrand (Arm)
2026-04-27 12:43   ` Matthew Wilcox
2026-04-27 11:43 ` [PATCH 2/3] bpf: arena: use page_ref_count() instead of page_mapped() in arena_free_pages() David Hildenbrand (Arm)
2026-04-27 12:17   ` Andrew Morton
2026-04-27 15:00     ` Alexei Starovoitov
2026-04-27 15:15       ` Andrew Morton
2026-04-27 15:27         ` Alexei Starovoitov
2026-04-27 13:00   ` Matthew Wilcox
2026-04-27 11:43 ` [PATCH 3/3] mm: remove page_mapped() David Hildenbrand (Arm)
2026-04-27 13:12   ` Matthew Wilcox
2026-04-27 13:21   ` Andrew Morton
2026-04-27 13:23     ` David Hildenbrand (Arm)
2026-04-27 14:42       ` Breno Leitao
2026-04-27 14:59         ` Matthew Wilcox
2026-04-27 20:59 ` [PATCH 0/3] " David Hildenbrand (Arm)
2026-04-27 21:38   ` Alexei Starovoitov

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