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 D0C782609FD for ; Mon, 21 Sep 2026 22:50:00 +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=1790031003; cv=none; b=Bm+YJXEVzONo2RuTKzp4ygkwX9K5ykGadHuxkQq7W6kJPTCFFOghH6uNstHfMc5OX7zoXxTarJ+evycaRrYLRiejv6c0RvBm3IGpRpw4nFJ4/F34wgieOOVVDudEi6lmyxjUmZyXboajx0pK8DoN++t62GLtnVwavODiQaCTJ3w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790031003; c=relaxed/simple; bh=fksEN0xPuGKA9Y1YFt+cIhRQ8gzrCf1Stn53fQX3qSA=; h=Date:To:From:Subject:Message-Id; b=LOQd2+GcoaL6/efTyTdFZpiO5vnD2aept4kGQlHx1rx+f5ZjNzTKyQMzMAG5lE+SlvZjciYotv46M0tfG/sU738N0rwoywy/phMr4pkvhUg0eiP2uoEp5bMmK3aLEFNrYAKzkvK5t1F7NQ2d6wITSaipdDuKxqZp0pJTOHYKBKc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=XVnXQsub; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="XVnXQsub" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38EEE1F00898; Mon, 21 Sep 2026 22:49:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1790030999; bh=ZoPeTF5s5tdofry4dkUBBRpzEgSOX2jD/YuD3DtYpYk=; h=Date:To:From:Subject; b=XVnXQsubwz/ECINJsshK6I7HdHER34jYB6xw/Pd/FRernJ3ssUDRicyG52vkFpQRc hCA2XI/lTtLg+UoTB7ooOepVRk7IsucJqqA9Dj1M0qZayp7a82DLeYbujEQRLZ/y5z rGc66BB0bdKkAZ8xgw+PdeD2pOUnq8N771uewFRQ= Date: Mon, 21 Sep 2026 15:49:58 -0700 To: mm-commits@vger.kernel.org,david@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-memory_hotplug-drop-config_have_arch_pfn_valid-handling-from-pfn_to_online_page.patch added to mm-new branch Message-Id: <20260921224959.38EEE1F00898@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/memory_hotplug: drop CONFIG_HAVE_ARCH_PFN_VALID handling from pfn_to_online_page() has been added to the -mm mm-new branch. Its filename is mm-memory_hotplug-drop-config_have_arch_pfn_valid-handling-from-pfn_to_online_page.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory_hotplug-drop-config_have_arch_pfn_valid-handling-from-pfn_to_online_page.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: "David Hildenbrand (Arm)" Subject: mm/memory_hotplug: drop CONFIG_HAVE_ARCH_PFN_VALID handling from pfn_to_online_page() Date: Mon, 21 Sep 2026 21:59:05 +0200 Drop CONFIG_HAVE_ARCH_PFN_VALID handling, as CONFIG_HAVE_ARCH_PFN_VALID is never used with CONFIG_MEMORY_HOTPLUG, as the latter depends on CONFIG_SPARSEMEM_VMEMMAP. Make sure it stays that way. Link: https://lore.kernel.org/20260921-b4-sparsemem_cleanups-v2-13-54d81d65e125@kernel.org Signed-off-by: David Hildenbrand (Arm) Signed-off-by: Andrew Morton Reviewed-by: Lorenzo Stoakes (ARM) Reviewed-by: Mike Rapoport (Microsoft) Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Kairui Song Cc: Qi Zheng Cc: Shakeel Butt Cc: Barry Song Cc: Axel Rasmussen Cc: Yuanchu Xie Cc: Wei Xu Cc: Baoquan He Cc: Baolin Wang Cc: Brendan Jackman Cc: Johannes Weiner Cc: Zi Yan Cc: Jan Kiszka Cc: Kieran Bingham Cc: Oscar Salvador Cc: Greg Kroah-Hartman Cc: Rafael J. Wysocki Cc: Danilo Krummrich --- mm/memory_hotplug.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) --- a/mm/memory_hotplug.c~mm-memory_hotplug-drop-config_have_arch_pfn_valid-handling-from-pfn_to_online_page +++ a/mm/memory_hotplug.c @@ -345,6 +345,8 @@ struct page *pfn_to_online_page(unsigned struct dev_pagemap *pgmap; struct mem_section *ms; + BUILD_BUG_ON(IS_ENABLED(CONFIG_HAVE_ARCH_PFN_VALID)); + if (nr >= NR_MEM_SECTIONS) return NULL; @@ -352,13 +354,6 @@ struct page *pfn_to_online_page(unsigned if (!online_section(ms)) return NULL; - /* - * Save some code text when online_section() + - * pfn_section_valid() are sufficient. - */ - if (IS_ENABLED(CONFIG_HAVE_ARCH_PFN_VALID) && !pfn_valid(pfn)) - return NULL; - if (!pfn_section_valid(ms, pfn)) return NULL; _ Patches currently in -mm which might be from david@kernel.org are maintainers-split-up-memory-management-memory-policy-and-migration.patch maintainers-move-memory-tiering-under-memory-management-numa-placement.patch maintainers-make-gregory-a-co-maintainer-of-memory-management-numa-placement.patch selftests-mm-khugepaged-remove-str_dup-usage.patch mm-sparse-move-mem_section-init-to-sparse_extreme_init.patch mm-sparse-refactor-sparse_sections_init.patch mm-sparse-move-initialization-of-section-metadata-to-sparse_metadata_init.patch mm-sparse-rename-and-cleanup-sparse_init_nid.patch mm-sparse-cleanup-sparse_init_one_section.patch mm-sparse-rename-__highest_present_section_nr-to-__highest_used_section_nr.patch mm-sparse-remove-pfn_in_present_section.patch mm-sparse-move-__highest_used_section_nr-handling.patch scripts-gdb-mmpy-remove-fallbacks-for-section_has_mem_map-and-section_is_early.patch mm-sparse-remove-section_marked_present.patch mm-sparse-remove-flags-parameter-from-sparse_init_one_section.patch fs-proc-page-clarify-comment-in-get_max_dump_pfn.patch mm-memory_hotplug-drop-config_have_arch_pfn_valid-handling-from-pfn_to_online_page.patch