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linux/arch/nios2
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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 nios2: migrate to the generic rule for built-in DTB 2025-04-06 06:22:01 +09:00
configs treewide: drop CONFIG_EMBEDDED 2023-08-21 13:46:25 -07:00
include mm: pgtable: fix pte_swp_exclusive 2025-06-11 14:52:08 -07:00
kernel arch: copy_thread: pass clone_flags as u64 2025-10-15 12:03:13 +02:00
lib treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
mm nios2: do not introduce conflicting mappings when flushing tlb entries 2025-04-24 17:19:02 -05:00
platform nios2: migrate to the generic rule for built-in DTB 2025-04-06 06:22:01 +09:00
Kbuild nios2: migrate to the generic rule for built-in DTB 2025-04-06 06:22:01 +09:00
Kconfig - Sumanth Korikkar has taught s390 to allocate hotplug-time page frames 2024-03-14 17:43:30 -07:00
Kconfig.debug NIOS2: fix kconfig unmet dependency warning for SERIAL_CORE_CONSOLE 2021-09-24 08:49:39 -05:00
Makefile kbuild: remove head-y syntax 2022-10-02 18:06:03 +09:00