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 98B11545284; Wed, 9 Sep 2026 13:34:03 +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=1788960844; cv=none; b=W3jSV/nBqXRPgJF0+aag/MZJzpMiqpTWo9eCMPVhZ0SgKWLxGYx2DE0IuLgEBHhXJQjY4DFMyNiKJaEQ9+xaPB7cNkrMhBhaSgRzUzj//KKOpO1AlWrLnnBRczBAWl7I9gclMb6nWaqfA3NtRHhTBCY8V+Y0rlSDvCPvC0lDUF8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788960844; c=relaxed/simple; bh=tuizVE3zPZHpcM2HGG+m6b3SuJ7LR3VtKbc7zGfeEhc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=q+7bIvxKgXSdOGqRePn2SQsTkHHzcBATnhnuA4N6sCJr47dJw0stIHO8eTFyAJGk3w4Gq7KBV7/hl/r2SQgW0YyB4qO1PoUJi8zrYWisQiIwHwtpQhKCQlmjPweaINAz+3sMfCMxGZaktvPvLjLaLBvHTP5ijTBeLKtPatnxYV8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kxAJ8TkH; 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="kxAJ8TkH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A319F1F00A3D; Wed, 9 Sep 2026 13:33:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788960843; bh=ke7wbwtpCjUAwuxuLGTSFpELTF8GAXgQgWxJpOfKOlk=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=kxAJ8TkHym33fm/nM2JegElwmiyVwFZ0YNsgval5iLx/fAaFlApVsOrk21RqvhOTw bdhecW15KUMV8YzLqiIH9eH0nvy37ki3NSxffsRITrTO2nvb4Pw9r+uTw0uLYi2lQ7 JEBxI1bdBIc9ph6Vw/Q+9p/SAbxsj56xU9uloikO5hpn+uFjATCy8MwIALXktyfQbh W5WZd1dLWstQKdJ/jti2Ep5zLEed9g5EExRVy6+g7zvzTrS0AIAUm/UJRTGFtCV7Ka eY+vCZsu9eFAyTywAl+ehZ3vRHLoi8Wm+gXFid62KNoMwvpJ7I4t9YT9ozLsk3Ok5h 2B5UB6El4/WMw== From: "David Hildenbrand (Arm)" Date: Wed, 09 Sep 2026 15:32:54 +0200 Subject: [PATCH 01/12] mm/sparse: move mem_section init to sparse_extreme_init() Precedence: bulk X-Mailing-List: linux-fsdevel@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: <20260909-b4-sparsemem_cleanups-v1-1-008fc8d579fe@kernel.org> References: <20260909-b4-sparsemem_cleanups-v1-0-008fc8d579fe@kernel.org> In-Reply-To: <20260909-b4-sparsemem_cleanups-v1-0-008fc8d579fe@kernel.org> To: Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Baoquan He , Baolin Wang , Brendan Jackman , Johannes Weiner , Zi Yan , Oscar Salvador , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Jan Kiszka , Kieran Bingham Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-cxl@vger.kernel.org, driver-core@lists.linux.dev, linux-fsdevel@vger.kernel.org, "David Hildenbrand (Arm)" X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1918; i=david@kernel.org; h=from:subject:message-id; bh=tuizVE3zPZHpcM2HGG+m6b3SuJ7LR3VtKbc7zGfeEhc=; b=owGbwMvMwCF2/OVpCdfQ3ZWMp9WSGLIWJqhf+8M6eYfkbV/5ZQszo18qzdtQdUrG9MjBH/tyl 68/zXM4p6OUhUGMg0FWTJElKPi+wcuX62qr3fiYYeawMoEMYeDiFICJXPZlZNhr2Gf7Y/aN9uOy Ru2WM1VWpqrOtt1qHfHiRc6HOeov9mkzMjzbsHlZRXPhkflTWh+3JPtvW87zXvjPD8mr2Ve0bPT 4f7AAAA== X-Developer-Key: i=david@kernel.org; a=openpgp; fpr=1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A Let's just avoid another pair of ifdef inside a function. While at it, switch to INTERNODE_CACHE_BYTES by just defining a fallback in cache.h as well, given that the x86 variant already provides one. Signed-off-by: David Hildenbrand (Arm) --- include/linux/cache.h | 1 + mm/sparse.c | 19 ++++++++++++------- 2 files changed, 13 insertions(+), 7 deletions(-) diff --git a/include/linux/cache.h b/include/linux/cache.h index e69768f50d532..b6e857b985bca 100644 --- a/include/linux/cache.h +++ b/include/linux/cache.h @@ -89,6 +89,7 @@ */ #ifndef INTERNODE_CACHE_SHIFT #define INTERNODE_CACHE_SHIFT L1_CACHE_SHIFT +#define INTERNODE_CACHE_BYTES (1 << INTERNODE_CACHE_SHIFT) #endif #if !defined(____cacheline_internodealigned_in_smp) diff --git a/mm/sparse.c b/mm/sparse.c index 9349ed6326c01..6a6d258862904 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -103,11 +103,22 @@ int __meminit sparse_index_init(unsigned long section_nr, int nid) return 0; } + +static void __init sparse_extreme_init(void) +{ + const unsigned long size = sizeof(struct mem_section *) * NR_SECTION_ROOTS; + + mem_section = memblock_alloc_or_panic(size, INTERNODE_CACHE_BYTES); +} #else /* !SPARSEMEM_EXTREME */ int __meminit sparse_index_init(unsigned long section_nr, int nid) { return 0; } + +static void __init sparse_extreme_init(void) +{ +} #endif /* @@ -197,13 +208,7 @@ void __init sparse_sections_init(void) unsigned long start, end; int i, nid; -#ifdef CONFIG_SPARSEMEM_EXTREME - unsigned long size, align; - - size = sizeof(struct mem_section *) * NR_SECTION_ROOTS; - align = 1 << (INTERNODE_CACHE_SHIFT); - mem_section = memblock_alloc_or_panic(size, align); -#endif + sparse_extreme_init(); for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, &nid) memory_present(nid, start, end); -- 2.43.0