From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3042E3D0914; Wed, 22 Jul 2026 15:31:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784734299; cv=none; b=Eu/d4Bfps3SLJh9ZnmlfBrVLzAfhvfVeDAwzK+moZo9r/7QzdmgU9Swa4+202iqlVluk8ZMqhOuuI7C0eo5oo+QMspNF+d9pUHdrv/89ttLT/4pCGU9AcSrwo8UvUvpELXyOf4wKy03eoe+1ias1qG6es0/ea2u07lXvdLB4x28= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784734299; c=relaxed/simple; bh=YcD0jzoOahG6x/x7befgYnktlqrNhCa1TVm2jqZpY/w=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=boQUPsPqHSXlQZtLvTPnfC6ZFvY++WR37ZG5wsBBs84sbXqqYnz6Dzp+A6XgwetPStqVSmBH1obqsIuKyZmNEoNlYM5Fxyo+gytTZdfn8DbVHyQwVCZ8xE4faSacGiT92DlXYGyo/resJGrUaNjlbGuFC8TUHVimoJ6cktYLf8k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=YB+ECKku; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="YB+ECKku" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 55A83168F; Wed, 22 Jul 2026 08:31:33 -0700 (PDT) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8EEAE3F66F; Wed, 22 Jul 2026 08:31:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1784734297; bh=YcD0jzoOahG6x/x7befgYnktlqrNhCa1TVm2jqZpY/w=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=YB+ECKku/PoYq2WT0AjK5FWjpwHm5WhvpyBL9iss6rJkCx9EWxGy5Xj4MUWQUp/nc bB/WO9swVClnAHd0CCdiTAWlLHW6My7AKAaZCl2lFEqQMRkMNS2H2HjRUcp/qutLrl XMv+zI5+luxlx6Hkz3AiZYLUrcxHFci+B5d421/c= From: Yeoreum Yun Date: Wed, 22 Jul 2026 16:30:16 +0100 Subject: [PATCH RFC v2 08/20] mm: vmscan: remove stack copy address of pud pass in wallk_pud_range() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260722-dummy_ptxp3-v2-8-d9e4bad31e0a@arm.com> References: <20260722-dummy_ptxp3-v2-0-d9e4bad31e0a@arm.com> In-Reply-To: <20260722-dummy_ptxp3-v2-0-d9e4bad31e0a@arm.com> To: Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org, Yeoreum Yun X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=931; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=YcD0jzoOahG6x/x7befgYnktlqrNhCa1TVm2jqZpY/w=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBqYOITGIRilBrCRHcB2LdtqoEOmFgxIF6Hd+Vnk IFCao2dq7WJAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCamDiEwAKCRBt1cPRWsUx M9rNDACPX1gvLIbSeFSgpsXYw5fiwtsaAo8fF9fow2EFQfuqsIXmDvvDuGvc+tGU4BaWuGH0mzM eklxLiUek0JNBF0GJ2x3A4Kq/ui/Kd9sAqMqxOPWurPgfQayM/59RN2xzFcJzTZhoDSZjVcP8Ru FK3kg4Bd/FVwqL91rO7uKn8nVD/occoSK5fX2tc1M7dm/Z484Oq0dzF8MCB+CDCrvRkASH5o8fR 7OBG17OYADT6CJpJ30NG3tnWw/z18SHM2Ho6dtWlczbf93oHjLBn9TtaJJ6TvsI6HevcytP/R4s mPt0zU94Gtx1B3c6i5b/GMxplXDdm1GNMjqlqgeIzBVATylzMaefHkFdkR/Ep2mCZJRH0hgBYvX M/U0vigKgKdlCN76Y4jnDC3QQ+LXNhIy8HWUDZKioYXWffW32R7/0W3xLPN4De5MFGGNUwfftWV WcWIiT/h7TzBoZGus/gSVNMHtcSBu9NwtPvLEQDo4Q8vWWR7vsw4ZNL4ki05RrlcOBNyM= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 The behaviour of pXdp_get() will change with generic compile-time folded page tables. To prepare for that, replace passing the address of a stack copy of a pXd to walk_pmd_range() with passing the pud pointer directly, allowing folded entries to be ignored. There should be no functional change. Signed-off-by: Yeoreum Yun --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 06e103f9781e..0c9c4ac89e09 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3727,7 +3727,7 @@ static int walk_pud_range(p4d_t *p4d, unsigned long start, unsigned long end, if (!pud_present(val) || WARN_ON_ONCE(pud_leaf(val))) continue; - walk_pmd_range(&val, addr, next, args); + walk_pmd_range(pud + i, addr, next, args); if (need_resched() || walk->batched >= MAX_LRU_BATCH) { end = (addr | ~PUD_MASK) + 1; -- 2.43.0