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 05F877FBA2 for ; Sat, 29 Nov 2025 18:41:46 +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=1764441709; cv=none; b=aoDObRN/rn+a0s9RSyklEiudGqTzzCnqcDhdxWALXGEB4Si8qTjACDPBjbYBZ2e/NFLcO221zHZ0Fp8v7tnoVUUUormOH81VV/D4JLztWF/KhkphfC6+/iEi/GJ2FqRA8DwotYVnW9S0T6LPE2B7mtjMY9aLar+KLIOak6bKGpI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764441709; c=relaxed/simple; bh=dyUE/HpPGi6mWfgmuQR3XRFspA7OwO5XdPe2ml01pCc=; h=Date:To:From:Subject:Message-Id; b=h9qQm2aFxGnOoxqaRWjsWeOyUqd3oS9IYYyKLbTLUofTyNgclAY+AmfI1QcHyzdlGKzX7TjhFHTlkOeCNXf6NKRMONkbSU//MRXJoIea8CR8caEJSmpS8RgYzXZfdTig/rzEbGl0/cyTKqP3IRiMvgJhVyVw56784esiwOIY2u8= 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=RI4cVvp4; 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="RI4cVvp4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 697AEC4CEF7; Sat, 29 Nov 2025 18:41:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1764441706; bh=dyUE/HpPGi6mWfgmuQR3XRFspA7OwO5XdPe2ml01pCc=; h=Date:To:From:Subject:From; b=RI4cVvp49FSxn++Ed5wOU4CwPUdId1cOVJc17FtUpMTs+Mjsh8vGu3OuVY3VXLa2B d6qIQB47ULNwy1gOaxNAnaJUYy/IXcfEFGf7UU0fJUANDPxN2N8oqlF4/v9jv4wGWK L3p9TJtRO6GKL7zBoO+QO6XqgwoV8i8O01XF8OUA= Date: Sat, 29 Nov 2025 10:41:45 -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,pfalcato@suse.de,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,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: <20251129184146.697AEC4CEF7@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: Tue, 25 Nov 2025 10:01:00 +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/8f0bc556e1b90eca8ea5eba41f8d5d3f9cd7c98a.1764064557.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes Acked-by: Vlastimil Babka Reviewed-by: Pedro Falcato Acked-by: Alice Ryhl [rust] Cc: Alex Gaynor 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: 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: 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 @@ -1314,15 +1314,13 @@ 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); @@ -1331,9 +1329,7 @@ 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