cgroup/cpuset: Move cpuset_update_flag() to cpuset-v1.c

cpuset_update_flag() is only used by the legacy (v1) interface: its
callers are the write handlers of cpuset1_files via cpuset_write_u64(),
and cpuset_css_offline() which invokes it only on the legacy hierarchy
(!cpuset_v2() && is_sched_load_balance()).

Move it into cpuset-v1.c, where its sole helper
cpuset1_update_tasks_flags() already lives, so both can go back to being
static and drop out of cpuset-internal.h.  As a result:

 - dup_or_alloc_cpuset(), free_cpuset() and validate_change() are now
   referenced from cpuset-v1.c, so they lose their static qualifier and
   gain declarations in cpuset-internal.h.

 - The v2 branch in cpuset_update_flag() that called
   cpuset_force_rebuild() is dead on the v1-only call paths and is
   dropped; the remaining rebuild_sched_domains_locked() path is kept.
   callback_lock, a static in cpuset.c, is taken through the existing
   cpuset_callback_lock_irq() wrapper.

 - The open-coded "!cpuset_v2() && is_sched_load_balance()" test in
   cpuset_css_offline() is wrapped in a new cpuset1_offline_css() helper
   (a no-op stub when CONFIG_CPUSETS_V1=n), removing the last
   cpuset_v2() branch from that path in cpuset.c.

No functional change intended.

Assisted-by: LLM
Signed-off-by: Ridong Chen <chenridong@xiaomi.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

0 files changed, 0 insertions, 0 deletions