From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8E67830F548; Mon, 27 Apr 2026 11:43:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777290206; cv=none; b=jSSF3QTG5TFOhlsqhvDET4bE5+QqkARlV95/cIXAPLWMhmxIW6uvU/U2oiVrYl4qwVmjf2+vBNhe4gFKzi6fwCOEDvJBOV2wIokPYESF8dNHocDUTLWM1ZE50sIW4d+soMJj/3zNhhDckl9D0M4ApT8duCQfFiTxL3J2XsMRGxQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777290206; c=relaxed/simple; bh=uDBjCE9uwaCanxz5E5CzypxBYKKLu044ftwopYhbNFU=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=tpB2h/p7XxRXggrG4kHuwx/L4fwwgm9aZEro/aIiUtkoRy1KLY89fpEv3ZXF1zpqGay8idiEXkGto0I5uPDnbB4PtWiQBz0N1b4wCgomI7rOkqUqNqrJ9RE0C3c07syUEe3w8aXiBwIvgxCmc2a7MsP5kHTi7/LW2Rt/8I0OXNY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FyvO8iCy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FyvO8iCy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EBF83C19425; Mon, 27 Apr 2026 11:43:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777290206; bh=uDBjCE9uwaCanxz5E5CzypxBYKKLu044ftwopYhbNFU=; h=From:Subject:Date:To:Cc:From; b=FyvO8iCy6U0CdSl4voD74NGPdf54CApAviztNsWG3LeztA9BljDb2zyoewVjhaSDO dHcIp6qb4pKZlD/tOulDBgZrSVPB0/TmQWLv2XVGxJVBJRgvrmbjZO+xgCJdzdswcw 7AuSXWBhSyQpTDgLGIlCjsLv6Q/2HYNI7BXaZBg2qdegmxtt/bdb0LCrk7sFZAJcTm 26/jSP6STtn26qBhsDnRl6Wk057bbopoyAUgGD/fxNSl0pUISvMf7U4UjR9ejul7p2 rvLtw3V7wX2vWB3fNgckE4q0JJ2QLgIAKb1e4jfD0JsSKI8K0vqCh9QMdg+BnLu7Pv bTSWlUgYXopkw== From: "David Hildenbrand (Arm)" Subject: [PATCH 0/3] mm: remove page_mapped() Date: Mon, 27 Apr 2026 13:43:13 +0200 Message-Id: <20260427-page_mapped-v1-0-e89c3592c74c@kernel.org> Precedence: bulk X-Mailing-List: linux-sh@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIANFL72kC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDEyMj3YLE9NT43MSCgtQU3UQTy0QLS6O0RBNjIyWgjoKi1LTMCrBp0bG 1tQAYfElxXQAAAA== To: Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Kumar Kartikeya Dwivedi , Song Liu , Yonghong Song , Jiri Olsa , Andrew Morton , Lorenzo Stoakes , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Rik van Riel , Harry Yoo , Jann Horn , Matthew Wilcox , "Liam R. Howlett" Cc: linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-mm@kvack.org, "David Hildenbrand (Arm)" X-Mailer: b4 0.13.0 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 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