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(p200300d82f372b00948cdd9f29c873f4.dip0.t-ipconnect.de. [2003:d8:2f37:2b00:948c:dd9f:29c8:73f4]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45b6f0c6fe5sm238421945e9.5.2025.09.01.06.39.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Sep 2025 06:39:46 -0700 (PDT) Message-ID: <72558e21-2ebf-448a-a93a-3d1a3181a592@redhat.com> Date: Mon, 1 Sep 2025 15:39:44 +0200 Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/4] arch: copy_thread: pass clone_flags as u64 To: schuster.simon@siemens-energy.com, Dinh Nguyen , Christian Brauner , Arnd Bergmann , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-csky@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, linux-security-module@vger.kernel.org, linux-trace-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-perf-users@vger.kernel.org, apparmor@lists.ubuntu.com, selinux@vger.kernel.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org References: <20250901-nios2-implement-clone3-v2-0-53fcf5577d57@siemens-energy.com> <20250901-nios2-implement-clone3-v2-3-53fcf5577d57@siemens-energy.com> From: David Hildenbrand Content-Language: en-US Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 01.09.25 15:09, Simon Schuster via B4 Relay wrote: > From: Simon Schuster > > With the introduction of clone3 in commit 7f192e3cd316 ("fork: add > clone3") the effective bit width of clone_flags on all architectures was > increased from 32-bit to 64-bit, with a new type of u64 for the flags. > However, for most consumers of clone_flags the interface was not > changed from the previous type of unsigned long. > > While this works fine as long as none of the new 64-bit flag bits > (CLONE_CLEAR_SIGHAND and CLONE_INTO_CGROUP) are evaluated, this is still > undesirable in terms of the principle of least surprise. > > Thus, this commit fixes all relevant interfaces of the copy_thread > function that is called from copy_process to consistently pass > clone_flags as u64, so that no truncation to 32-bit integers occurs on > 32-bit architectures. > > Signed-off-by: Simon Schuster > --- > arch/alpha/kernel/process.c | 2 +- > arch/arc/kernel/process.c | 2 +- > arch/arm/kernel/process.c | 2 +- > arch/arm64/kernel/process.c | 2 +- > arch/csky/kernel/process.c | 2 +- > arch/hexagon/kernel/process.c | 2 +- > arch/loongarch/kernel/process.c | 2 +- > arch/m68k/kernel/process.c | 2 +- > arch/microblaze/kernel/process.c | 2 +- > arch/mips/kernel/process.c | 2 +- > arch/nios2/kernel/process.c | 2 +- > arch/openrisc/kernel/process.c | 2 +- > arch/parisc/kernel/process.c | 2 +- > arch/powerpc/kernel/process.c | 2 +- > arch/riscv/kernel/process.c | 2 +- > arch/s390/kernel/process.c | 2 +- > arch/sh/kernel/process_32.c | 2 +- > arch/sparc/kernel/process_32.c | 2 +- > arch/sparc/kernel/process_64.c | 2 +- > arch/um/kernel/process.c | 2 +- > arch/x86/include/asm/fpu/sched.h | 2 +- > arch/x86/include/asm/shstk.h | 4 ++-- > arch/x86/kernel/fpu/core.c | 2 +- > arch/x86/kernel/process.c | 2 +- > arch/x86/kernel/shstk.c | 2 +- > arch/xtensa/kernel/process.c | 2 +- > 26 files changed, 27 insertions(+), 27 deletions(-) > (Adjust To: list) Thanks! Acked-by: David Hildenbrand -- Cheers David / dhildenb