From: Christian Brauner Date: Mon, 1 Sep 2025 13:31:40 +0000 (+0200) Subject: Merge patch series "nios2: Add architecture support for clone3" X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=76cea30ad520238160bf8f5e2f2803fcd7a08d22;p=thirdparty%2Fkernel%2Fstable.git Merge patch series "nios2: Add architecture support for clone3" Simon Schuster says: This series adds support for the clone3 system call to the nios2 architecture. This addresses the build-time warning "warning: clone3() entry point is missing, please fix" introduced in 505d66d1abfb9 ("clone3: drop __ARCH_WANT_SYS_CLONE3 macro"). The implementation passes the relevant clone3 tests of kselftest when applied on top of next-20250815: ./run_kselftest.sh TAP version 13 1..4 # selftests: clone3: clone3 ok 1 selftests: clone3: clone3 # selftests: clone3: clone3_clear_sighand ok 2 selftests: clone3: clone3_clear_sighand # selftests: clone3: clone3_set_tid ok 3 selftests: clone3: clone3_set_tid # selftests: clone3: clone3_cap_checkpoint_restore ok 4 selftests: clone3: clone3_cap_checkpoint_restore The series also includes a small patch to kernel/fork.c that ensures that clone_flags are passed correctly on architectures where unsigned long is insufficient to store the u64 clone_flags. It is marked as a fix for stable backporting. As requested, in v2, this series now further tries to correct this type error throughout the whole code base. Thus, it now touches a larger number of subsystems and all architectures. Therefore, another test was performed for ARCH=x86_64 (as a representative for 64-bit architectures). Here, the series builds cleanly without warnings on defconfig with CONFIG_SECURITY_APPARMOR=y and CONFIG_SECURITY_TOMOYO=y (to compile-check the LSM-related changes). The build further successfully passes testing/selftests/clone3 (with the patch from 20241105062948.1037011-1-zhouyuhang1010@163.com to prepare clone3_cap_checkpoint_restore for compatibility with the newer libcap version on my system). * patches from https://lore.kernel.org/20250901-nios2-implement-clone3-v2-0-53fcf5577d57@siemens-energy.com: nios2: implement architecture-specific portion of sys_clone3 arch: copy_thread: pass clone_flags as u64 copy_process: pass clone_flags as u64 across calltree copy_sighand: Handle architectures where sizeof(unsigned long) < sizeof(u64) Link: https://lore.kernel.org/20250901-nios2-implement-clone3-v2-0-53fcf5577d57@siemens-energy.com Signed-off-by: Christian Brauner --- 76cea30ad520238160bf8f5e2f2803fcd7a08d22