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Simon Schuster e0d6fb7923 arch: copy_thread: pass clone_flags as u64 
[ Upstream commit bbc46b23af ]

With the introduction of clone3 in commit 7f192e3cd3 ("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 <schuster.simon@siemens-energy.com>
Link: https://lore.kernel.org/20250901-nios2-implement-clone3-v2-3-53fcf5577d57@siemens-energy.com
Fixes: c5febea095 ("fork: Pass struct kernel_clone_args into copy_thread")
Acked-by: Guo Ren (Alibaba Damo Academy) <guoren@kernel.org>
Acked-by: Andreas Larsson <andreas@gaisler.com> # sparc
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-10-15 12:03:13 +02:00
..
boot openrisc: migrate to the generic rule for built-in DTB 2025-01-14 17:17:15 +00:00
configs openrisc: migrate to the generic rule for built-in DTB 2025-01-14 17:17:15 +00:00
include OpenRISC updates for 6.17 2025-08-04 08:37:46 -07:00
kernel arch: copy_thread: pass clone_flags as u64 2025-10-15 12:03:13 +02:00
lib openrisc/delay: Add include to fix symbol not declared warning 2022-05-23 17:15:49 +09:00
mm mm: call ctor/dtor for kernel PTEs 2025-05-11 17:48:21 -07:00
Kbuild openrisc: migrate to the generic rule for built-in DTB 2025-01-14 17:17:15 +00:00
Kconfig openrisc: Add support for restartable sequences 2025-01-14 17:17:16 +00:00
Kconfig.debug treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile kbuild: remove head-y syntax 2022-10-02 18:06:03 +09:00