From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6B3304779A8 for ; Fri, 27 Feb 2026 20:10:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772223020; cv=none; b=VfsIgr4buzfFvIp67Cf8Kf3s+cZrj66DvmvRjvwD+u0opi8MmetCCG+ccON+jBdAhtpZAx47cGBUC/ubQrNeZVNBPKl/A3feH5/hgqcSm+rKYWEcZVPc8IrApK86i103X64jjZ5OEh4+8KPbEd3Ic1Khe4U3rQZSPZAJrAxkVOY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772223020; c=relaxed/simple; bh=23ZG1WnSirWDsYjWEO8LQRc3d1uDyfq5TH0N3r/AiG0=; h=Date:To:From:Subject:Message-Id; b=UA5wWkSHfONF63eoNRxRd8/IeRNHkqDWxessKHcLwMhm4biIjynqhEcpS/v6zjE/fdxHS3Bl6Fscfe0WWuVQdHQ2DO38gJmos8DOS608hYd9AOalarCbGmTS5r+QUuXGpGDrwkT9hYghzy7iJp7hPc0Vzt219+WRcOrOtYGvB4s= 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=GPGApQm8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="GPGApQm8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 04863C116C6; Fri, 27 Feb 2026 20:10:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1772223020; bh=23ZG1WnSirWDsYjWEO8LQRc3d1uDyfq5TH0N3r/AiG0=; h=Date:To:From:Subject:From; b=GPGApQm8mdTFFrhJbTi5S6zx/bALGlilVu0hRHT4xf8cgLpbQMieeMyQ3BQ8O3RZ2 uZ/qaDUAHJKOKgobiv/rkJKGjv+G/xV6gbiEjlgzT4xkQCatAyExUW1xBe0GGJIDei 8TbL4bjKEjOU2DxFOIMSlzJeluLT50YuDidoA4pk= Date: Fri, 27 Feb 2026 12:10:19 -0800 To: mm-commits@vger.kernel.org,ziy@nvidia.com,willy@infradead.org,vbabka@suse.cz,usamaarif642@gmail.com,rppt@kernel.org,roman.gushchin@linux.dev,rientjes@google.com,paul.walmsley@sifive.com,palmer@dabbelt.com,osalvador@suse.de,muchun.song@linux.dev,mhocko@suse.com,lorenzo.stoakes@oracle.com,kernel@xen0n.name,harry.yoo@oracle.com,hannes@cmpxchg.org,fvdl@google.com,david@kernel.org,corbet@lwn.net,cl@gentwo.org,chenhuacai@kernel.org,bhe@redhat.com,aou@eecs.berkeley.edu,alex@ghiti.fr,kas@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-slab-use-compound_head-in-page_slab.patch added to mm-new branch Message-Id: <20260227201020.04863C116C6@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/slab: use compound_head() in page_slab() has been added to the -mm mm-new branch. Its filename is mm-slab-use-compound_head-in-page_slab.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-slab-use-compound_head-in-page_slab.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 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: Kiryl Shutsemau Subject: mm/slab: use compound_head() in page_slab() Date: Fri, 27 Feb 2026 19:42:56 +0000 page_slab() contained an open-coded implementation of compound_head(). Replace the duplicated code with a direct call to compound_head(). Link: https://lkml.kernel.org/r/20260227194302.274384-19-kas@kernel.org Signed-off-by: Kiryl Shutsemau Acked-by: David Hildenbrand (Arm) Reviewed-by: Vlastimil Babka Cc: Albert Ou Cc: Alexandre Ghiti Cc: Baoquan He Cc: Christoph Lameter Cc: David Rientjes Cc: Frank van der Linden Cc: Harry Yoo Cc: Huacai Chen Cc: Johannes Weiner Cc: Jonathan Corbet Cc: Lorenzo Stoakes Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Muchun Song Cc: Oscar Salvador Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Roman Gushchin Cc: Usama Arif Cc: WANG Xuerui Cc: Zi Yan Signed-off-by: Andrew Morton --- mm/slab.h | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) --- a/mm/slab.h~mm-slab-use-compound_head-in-page_slab +++ a/mm/slab.h @@ -131,19 +131,7 @@ static_assert(IS_ALIGNED(offsetof(struct */ static inline struct slab *page_slab(const struct page *page) { - unsigned long info; - - info = READ_ONCE(page->compound_info); - if (info & 1) { - /* See compound_head() */ - if (compound_info_has_mask()) { - unsigned long p = (unsigned long)page; - page = (struct page *)(p & info); - } else { - page = (struct page *)(info - 1); - } - } - + page = compound_head(page); if (data_race(page->page_type >> 24) != PGTY_slab) page = NULL; _ Patches currently in -mm which might be from kas@kernel.org are mm-move-max_folio_order-definition-to-mmzoneh.patch mm-change-the-interface-of-prep_compound_tail.patch mm-rename-the-compound_head-field-in-the-struct-page-to-compound_info.patch mm-move-set-clear_compound_head-next-to-compound_head.patch riscv-mm-align-vmemmap-to-maximal-folio-size.patch loongarch-mm-align-vmemmap-to-maximal-folio-size.patch mm-rework-compound_head-for-power-of-2-sizeofstruct-page.patch mm-sparse-check-memmap-alignment-for-compound_info_has_mask.patch mm-hugetlb-defer-vmemmap-population-for-bootmem-hugepages.patch mm-hugetlb-refactor-code-around-vmemmap_walk.patch x86-vdso-undefine-config_hugetlb_page_optimize_vmemmap-for-vdso32.patch mm-hugetlb-remove-fake-head-pages.patch mm-drop-fake-head-checks.patch hugetlb-remove-vmemmap_synchronize_rcu.patch mm-hugetlb-remove-hugetlb_optimize_vmemmap_key-static-key.patch mm-remove-the-branch-from-compound_head.patch hugetlb-update-vmemmap_deduprst.patch mm-slab-use-compound_head-in-page_slab.patch