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 C64A4303A16 for ; Thu, 20 Nov 2025 21:45:34 +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=1763675134; cv=none; b=B7eYPMfvL6oADBc7u+3zjMdmcpDeJqOsGNpIE3Qjai8OYsO2VoZrNtMIhteZaXjkHSC+gqf+OtJM3CBFO13u4xSsXcfoP0sN3/vs2iP2CXk4/0LeQu5coOLMY0rS91RH4CyTcnztzwme5+kIFSJLqESwUC8jliwFdwf92dQlmTQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763675134; c=relaxed/simple; bh=EZezLDdF7Fi42oKT7pWi9xWGiBkePTgrBMCQwsZRPVY=; h=Date:To:From:Subject:Message-Id; b=mNAj9wwl+i/TY3S7jFayyjK/ENQyDbrMyLQv5fYaGElqbimCnxJqPk4ABerRwcPsWfFfjbv/Gzibw3q/YFjRlvqV9l9m2x7QzKwnRV0uDg/6fAJ+bIFLFGTcfsphEnP2G7j9D224c1WXLJjTvqHDguh/ccT/6eISRpdD4kgFwGI= 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=vZCYnsmt; 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="vZCYnsmt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93DBBC4CEF1; Thu, 20 Nov 2025 21:45:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1763675134; bh=EZezLDdF7Fi42oKT7pWi9xWGiBkePTgrBMCQwsZRPVY=; h=Date:To:From:Subject:From; b=vZCYnsmt/8bGqwt6PCfqvTCxh2floYPZtqdGU+1OG2teLcQ62qizIMzkamij+wCPU paUq8ic+HoFLfM4LPAD8wU/d9wXs8g+NuD8UsDtX9N/l/94gLcnicuxZAKB5SRBJF4 Ci3dMQ54G3sGvAWk5dCMGu94usU2LfP3R149fuWo= Date: Thu, 20 Nov 2025 13:45:34 -0800 To: mm-commits@vger.kernel.org,ziy@nvidia.com,zhengqi.arch@bytedance.com,yuanchu@google.com,ying.huang@linux.alibaba.com,xu.xin16@zte.com.cn,willy@infradead.org,weixugc@google.com,vschneid@redhat.com,vincent.guittot@linaro.org,vbabka@suse.cz,tmgross@umich.edu,surenb@google.com,shikemeng@huaweicloud.com,shakeel.butt@linux.dev,ryan.roberts@arm.com,rppt@kernel.org,rostedt@goodmis.org,rientjes@google.com,riel@surriel.com,rakie.kim@sk.com,peterz@infradead.org,peterx@redhat.com,osalvador@suse.de,ojeda@kernel.org,nphamcs@gmail.com,npache@redhat.com,muchun.song@linux.dev,mingo@redhat.com,mhocko@suse.com,mgorman@suse.de,matthew.brost@intel.com,lkp@intel.com,liam.howlett@oracle.com,leon@kernel.org,lance.yang@linux.dev,kees@kernel.org,kasong@tencent.com,juri.lelli@redhat.com,joshua.hahnjy@gmail.com,jhubbard@nvidia.com,jgg@ziepe.ca,jannh@google.com,hannes@cmpxchg.org,gourry@gourry.net,gary@garyguo.net,dietmar.eggemann@arm.com,dev.jain@arm.com,david@redhat.com,dakr@kernel.org,chrisl@kernel.org,chengming.zhou@linux.dev,byungchul@sk.com,bsegall@google.com,boqun.feng@gmail.com,bjorn3_gh@protonmail.com,bhe@redhat.com,baolin.wang@linux.alibaba.com,baohua@kernel.org,axelrasmussen@google.com,apopple@nvidia.com,aliceryhl@google.com,alex.gaynor@gmail.com,a.hindborg@kernel.org,lorenzo.stoakes@oracle.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-simplify-and-rename-mm-flags-function-for-clarity.patch removed from -mm tree Message-Id: <20251120214534.93DBBC4CEF1@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm: simplify and rename mm flags function for clarity has been removed from the -mm tree. Its filename was mm-simplify-and-rename-mm-flags-function-for-clarity.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Lorenzo Stoakes Subject: mm: simplify and rename mm flags function for clarity Date: Fri, 14 Nov 2025 13:26:09 +0000 The __mm_flags_set_word() function is slightly ambiguous - we use 'set' to refer to setting individual bits (such as in mm_flags_set()) but here we use it to refer to overwriting the value altogether. Rename it to __mm_flags_overwrite_word() to eliminate this ambiguity. We additionally simplify the functions, eliminating unnecessary bitmap_xxx() operations (the compiler would have optimised these out but it's worth being as clear as we can be here). Link: https://lkml.kernel.org/r/a319a71d57a2af3930051c46dad954d03d55857d.1763126447.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes Cc: Alex Gaynor Cc: Alice Ryhl Cc: Alistair Popple Cc: Andreas Hindborg Cc: Axel Rasmussen Cc: Baolin Wang Cc: Baoquan He Cc: Barry Song Cc: Ben Segall Cc: Björn Roy Baron Cc: Boqun Feng Cc: Byungchul Park Cc: Chengming Zhou Cc: Chris Li Cc: Danilo Krummrich Cc: David Hildenbrand Cc: David Rientjes Cc: Dev Jain Cc: Dietmar Eggemann Cc: Gary Guo Cc: Gregory Price Cc: "Huang, Ying" Cc: Ingo Molnar Cc: Jann Horn Cc: Jason Gunthorpe Cc: Johannes Weiner Cc: John Hubbard Cc: Joshua Hahn Cc: Juri Lelli Cc: Kairui Song Cc: Kees Cook Cc: Kemeng Shi Cc: kernel test robot Cc: Lance Yang Cc: Leon Romanovsky Cc: Liam Howlett Cc: Mathew Brost Cc: Matthew Wilcox (Oracle) Cc: Mel Gorman Cc: Michal Hocko Cc: Miguel Ojeda Cc: Mike Rapoport Cc: Muchun Song Cc: Nhat Pham Cc: Nico Pache Cc: Oscar Salvador Cc: Peter Xu Cc: Peter Zijlstra Cc: Qi Zheng Cc: Rakie Kim Cc: Rik van Riel Cc: Ryan Roberts Cc: Shakeel Butt Cc: Steven Rostedt Cc: Suren Baghdasaryan Cc: Trevor Gross Cc: Valentin Schneider Cc: Vincent Guittot Cc: Vlastimil Babka Cc: Wei Xu Cc: xu xin Cc: Yuanchu Xie Cc: Zi Yan Signed-off-by: Andrew Morton --- include/linux/mm_types.h | 14 +++++--------- kernel/fork.c | 4 ++-- 2 files changed, 7 insertions(+), 11 deletions(-) --- a/include/linux/mm_types.h~mm-simplify-and-rename-mm-flags-function-for-clarity +++ a/include/linux/mm_types.h @@ -1289,15 +1289,13 @@ struct mm_struct { unsigned long cpu_bitmap[]; }; -/* Set the first system word of mm flags, non-atomically. */ -static inline void __mm_flags_set_word(struct mm_struct *mm, unsigned long value) +/* Copy value to the first system word of mm flags, non-atomically. */ +static inline void __mm_flags_overwrite_word(struct mm_struct *mm, unsigned long value) { - unsigned long *bitmap = ACCESS_PRIVATE(&mm->flags, __mm_flags); - - bitmap_copy(bitmap, &value, BITS_PER_LONG); + *ACCESS_PRIVATE(&mm->flags, __mm_flags) = value; } -/* Obtain a read-only view of the bitmap. */ +/* Obtain a read-only view of the mm flags bitmap. */ static inline const unsigned long *__mm_flags_get_bitmap(const struct mm_struct *mm) { return (const unsigned long *)ACCESS_PRIVATE(&mm->flags, __mm_flags); @@ -1306,9 +1304,7 @@ static inline const unsigned long *__mm_ /* Read the first system word of mm flags, non-atomically. */ static inline unsigned long __mm_flags_get_word(const struct mm_struct *mm) { - const unsigned long *bitmap = __mm_flags_get_bitmap(mm); - - return bitmap_read(bitmap, 0, BITS_PER_LONG); + return *__mm_flags_get_bitmap(mm); } /* --- a/kernel/fork.c~mm-simplify-and-rename-mm-flags-function-for-clarity +++ a/kernel/fork.c @@ -1061,10 +1061,10 @@ static struct mm_struct *mm_init(struct if (current->mm) { unsigned long flags = __mm_flags_get_word(current->mm); - __mm_flags_set_word(mm, mmf_init_legacy_flags(flags)); + __mm_flags_overwrite_word(mm, mmf_init_legacy_flags(flags)); mm->def_flags = current->mm->def_flags & VM_INIT_DEF_MASK; } else { - __mm_flags_set_word(mm, default_dump_filter); + __mm_flags_overwrite_word(mm, default_dump_filter); mm->def_flags = 0; } _ Patches currently in -mm which might be from lorenzo.stoakes@oracle.com are mm-correctly-handle-uffd-pte-markers.patch mm-introduce-leaf-entry-type-and-use-to-simplify-leaf-entry-logic.patch mm-avoid-unnecessary-uses-of-is_swap_pte.patch mm-eliminate-is_swap_pte-when-softleaf_from_pte-suffices.patch mm-use-leaf-entries-in-debug-pgtable-remove-is_swap_pte.patch fs-proc-task_mmu-refactor-pagemap_pmd_range.patch mm-avoid-unnecessary-use-of-is_swap_pmd.patch mm-huge_memory-refactor-copy_huge_pmd-non-present-logic.patch mm-huge_memory-refactor-change_huge_pmd-non-present-logic.patch mm-replace-pmd_to_swp_entry-with-softleaf_from_pmd.patch mm-introduce-pmd_is_huge-and-use-where-appropriate.patch mm-remove-remaining-is_swap_pmd-users-and-is_swap_pmd.patch mm-remove-non_swap_entry-and-use-softleaf-helpers-instead.patch mm-remove-is_hugetlb_entry_.patch mm-eliminate-further-swapops-predicates.patch mm-replace-remaining-pte_to_swp_entry-with-softleaf_from_pte.patch