From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 6A7134D2EFB; Fri, 25 Sep 2026 20:12:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790367165; cv=none; b=CcEm12Ab44NYQuKNa1ekUMVkUPJUYDV2JP+xE0uIKxhBbUfe36RSKeVzPkauazFVa5rRx3KgP/6m65P7xHRK+mWNFVmgCcnh3W0U0ManR/UPMZndhOAn+kKe0g0rEffZgQrE7XXQ4B0fgIQiykvweymDRJG5cuT0U1I3eoShff0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790367165; c=relaxed/simple; bh=wTPS3tObjnit80i5jG0OzSjV+ZJC9LambnmGz9RIJjc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=csSBOF14/xeD12SiZVEgeA2dreuvRRLZuWCR7b0O8pnnP1hj8FimlvwQSKkS1boC3oBACPoiPmyrGi9utjTqv1Jhic4QhVhzrpXlsGaskHaieCbfVkmgom/WUcfq50/9X9e6T0JFJ/f61BlXemhy07ZGCNx1PLvD71a28mZLUlQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=koGG6VkH; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="koGG6VkH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A74D61F00898; Fri, 25 Sep 2026 20:12:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790367153; bh=i9btTZnCFLC8MMw6KMGK91iVLYRqVa7A+XQvAJcnthc=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=koGG6VkHK9sq7MUCsKX6l8GWvGH1X10xvKB/1Gb6IALPCnGNK6OLAn4edc3ppM9tw XF5DLLj+zcIZx0j+zL/F8/pMW1FR8yjWkWYsg0z+hqLvAIEBvGhuRCTS95OSheg3IC i8haH1mXFZ6EiUV4mPNPDYbngmJZJL6fneEkRFBz69DDia5YYUyV+DyyfnCtX2nw9b aFW4fMhecvKfClHGenR6/HrNpp/dpU9NU7ZXVhlKOxZhvXhq4/JGllecZvzt50vRqf 5xFwTYJFDrouBhp5qHt7Zk/0avP9tlgacO//JPou+MCvPzoZmO5Vrju3Q2vp+7jOow Wv8x2IhM+uhGg== From: "Lorenzo Stoakes (ARM)" Date: Fri, 25 Sep 2026 21:09:42 +0100 Subject: [PATCH v5 07/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for m68k-coldfire Precedence: bulk X-Mailing-List: linux-alpha@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: <20260925-rcu-pagetable-freeing-v5-7-31e91065fea4@kernel.org> References: <20260925-rcu-pagetable-freeing-v5-0-31e91065fea4@kernel.org> In-Reply-To: <20260925-rcu-pagetable-freeing-v5-0-31e91065fea4@kernel.org> To: Andrew Morton , David Hildenbrand , Zi Yan , Baolin Wang , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kiryl Shutsemau , Guo Ren , Brian Cain , Geert Uytterhoeven , Dinh Nguyen , Simon Schuster , Jonas Bonn , Stefan Kristiansson , Stafford Horne , Rich Felker , John Paul Adrian Glaubitz , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Russell King , Vineet Gupta , Michal Simek , Chris Zankel , Max Filippov , Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Peter Zijlstra , "David S. Miller" , Andreas Larsson , Richard Henderson , Matt Turner , Magnus Lindholm , Catalin Marinas , Mark Rutland , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , "Christophe Leroy (CS GROUP)" , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Richard Weinberger , Anton Ivanov , Johannes Berg , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Arnd Bergmann , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jason Gunthorpe , John Hubbard , Peter Xu , Yoshinori Sato , Shakeel Butt , Jonathan Corbet , Randy Dunlap Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-openrisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-snps-arc@lists.infradead.org, linux-arch@vger.kernel.org, sparclinux@vger.kernel.org, linux-alpha@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-um@lists.infradead.org, Hugh Dickins , Qi Zheng , linux-doc@vger.kernel.org, "Lorenzo Stoakes (ARM)" , Greg Ungerer X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=2031; i=ljs@kernel.org; h=from:subject:message-id; bh=wTPS3tObjnit80i5jG0OzSjV+ZJC9LambnmGz9RIJjc=; b=owGbwMvMwCV2fu7ZrsZH9SKMp9WSGLK2XWX/nrikwtvb6sJaZkaOMrNvQjuEvKuOTD/x7pxf+ OXTKV0SHaUsDGJcDLJiiizPv4jvDxIJm9d5wd8NZg4rE8gQBi5OAZiIZCcjwwZR4ZUL3m+I7wsx 28EiL/8lbNpvXfG9HGGXd8pt/qk9vZDhv1N3gp7PVQn/0s4L+TtjrpclvJk57XX1tn0fvjKcb81 azwkA X-Developer-Key: i=ljs@kernel.org; a=openpgp; fpr=E7F417BF5214569E89D04F46CF9DCD8A81E27F14 Similar to sun3, the coldfire variant of m68k uses 2-level page tables. Update its __pte_free_tlb() function to use tlb_remove_ptdesc() in order that, with CONFIG_MMU_GATHER_RCU_TABLE_FREE, page tables are freed under RCU. The page tables occupy a page each and have no odd semantics, so this change suffices to allow enabling of CONFIG_MMU_GATHER_RCU_TABLE_FREE for m68k-coldfire, so do so. This forms part of an overall effort to switch every architecture to this mode. Acked-by: Kiryl Shutsemau (Meta) Acked-by: Greg Ungerer Tested-by: Greg Ungerer Acked-by: Lance Yang Signed-off-by: Lorenzo Stoakes (ARM) --- arch/m68k/Kconfig | 2 +- arch/m68k/include/asm/mcf_pgalloc.h | 5 +---- 2 files changed, 2 insertions(+), 5 deletions(-) diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index e29610fd1240..6b8ec67c86fd 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -36,7 +36,7 @@ config M68K select HAVE_MOD_ARCH_SPECIFIC select HAVE_UID16 select MMU_GATHER_NO_RANGE if MMU - select MMU_GATHER_RCU_TABLE_FREE if MMU && SUN3 + select MMU_GATHER_RCU_TABLE_FREE if MMU && (SUN3 || COLDFIRE) select MODULES_USE_ELF_REL select MODULES_USE_ELF_RELA select NO_DMA if !MMU && !COLDFIRE diff --git a/arch/m68k/include/asm/mcf_pgalloc.h b/arch/m68k/include/asm/mcf_pgalloc.h index fc5454d37da3..b53ff0950db2 100644 --- a/arch/m68k/include/asm/mcf_pgalloc.h +++ b/arch/m68k/include/asm/mcf_pgalloc.h @@ -39,10 +39,7 @@ extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address) static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable, unsigned long address) { - struct ptdesc *ptdesc = virt_to_ptdesc(pgtable); - - pagetable_dtor(ptdesc); - pagetable_free(ptdesc); + tlb_remove_ptdesc(tlb, virt_to_ptdesc(pgtable)); } static inline pgtable_t pte_alloc_one(struct mm_struct *mm) -- 2.55.0