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 4B1C83C456B; Mon, 21 Sep 2026 19:59:23 +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=1790020764; cv=none; b=BP1vNRQlwfgjzGuZWk+LmFQ0PTPB0/xaM7zQiTnJVjHmjJ1kruyQaAisg3PmELjT6i18o81RxrggM9kvVCY7UJHbLhkTDnITZWBXBHKx7cuTBjKpgGIjrmuEFQdpwFW3aIT8YVOdvEQHAyBRWWJbLh0coi0jNCwOyUiGFKCxkcs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790020764; c=relaxed/simple; bh=RDUKgR4Zh55foA1PVaXPqBWcOHxguZt1tds+dCAcB5o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=oiiy013jrT7Z9UY2n/TRr2r4qcPtKspMLt7eJh9lJXvdH6T0b5tpsTPt4SBaULK1BsDQD7uCtYv9kszo8j3/s9BDRjZYxEVfYE2y21UAo4IqxA2xuqIEba0iwBqbTkCkyGcIj5Qi26PdG1CGI2AkxTxAHZxqLuUE0bjYEOHgN1U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=goOJO+Ju; 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="goOJO+Ju" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 907511F00898; Mon, 21 Sep 2026 19:59:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790020762; bh=f3OLDjTedsbgC3rcZhdOQN0X2zBug4ET6xkZFH6DZFY=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=goOJO+JucOQyVJhwBfpMh557Mt7X9EpUqiE/EPsXm4eYLVfpDHY4Sz7us7rwrdmnQ Bfe9PXXPxI2rtkVy5TKC1kpPBhNLS0Dfks+8osZBKG+2uxCn93k+LsvLN55gPfnomd 4HcmAsTeQgH22E7n2fE/ONBJ6/4uD9CmmdAep74u34s6N+wXG4C7Wx7N0YyhxML3nn nHXmHNHxzhBBZCOy63EBsxd4Sq90Vlm7Vfz/L/J2QJTZenlQBdgLulgN1JQQDYH3fP U9RH3bGbIYac9um1zcYtRfW35E3dnGxbfY5n/IBwFi+RPzRAEMMBRrUOaGCqgxviVb B2Z/oHF0sdVVg== From: "David Hildenbrand (Arm)" Date: Mon, 21 Sep 2026 21:58:53 +0200 Subject: [PATCH v2 01/13] mm/sparse: move mem_section init to sparse_extreme_init() 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: <20260921-b4-sparsemem_cleanups-v2-1-54d81d65e125@kernel.org> References: <20260921-b4-sparsemem_cleanups-v2-0-54d81d65e125@kernel.org> In-Reply-To: <20260921-b4-sparsemem_cleanups-v2-0-54d81d65e125@kernel.org> To: Andrew Morton , David Hildenbrand , 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 , Jan Kiszka , Kieran Bingham , Oscar Salvador , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich 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 X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2075; i=david@kernel.org; h=from:subject:message-id; bh=RDUKgR4Zh55foA1PVaXPqBWcOHxguZt1tds+dCAcB5o=; b=owGbwMvMwCF2/OVpCdfQ3ZWMp9WSGLI29rQqTbnO8DPl8RKB1sUK0hNk3s8y2fL9/Szpe6K7H Nadqok61FHKwiDGwSArpsgSFHzf4OXLdbXVbnzMMHNYmUCGMHBxCsBEkvwY/kr/UXzOzb2/r9fs yu09Wm8rfa8/a+vamDFbU0OUfd+FlemMDP+jP+p8mDLpZB93zpJFEi3mBRu03Q1VzZ0Fj9xLrq4 tZwIA 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. Acked-by: Oscar Salvador Reviewed-by: Lorenzo Stoakes (ARM) Reviewed-by: Mike Rapoport (Microsoft) 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 b75921c622ede..8cd2b06b231ac 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 /* @@ -196,13 +207,7 @@ 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