umh: replace use of system_unbound_wq with system_dfl_wq

This patch continues the effort to refactor workqueue APIs, which has begun
with the changes introducing new workqueues and a new alloc_workqueue flag:

   commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
   commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")

The point of the refactoring is to eventually alter the default behavior of
workqueues to become unbound by default so that their workload placement is
optimized by the scheduler.

Before that to happen, workqueue users must be converted to the better named
new workqueues with no intended behaviour changes:

   system_wq -> system_percpu_wq
   system_unbound_wq -> system_dfl_wq

This way the old obsolete workqueues (system_wq, system_unbound_wq) can be
removed in the future.

Cc: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>

diff --git a/kernel/umh.c b/kernel/umh.c
index cffda97d961cba398f069e504eba494fdcac34ed..48117c569e1aaa1b1783f0e0db6943509eea520f 100644 (file)
--- a/kernel/umh.c
+++ b/kernel/umh.c
@@ -430,7 +430,7 @@ int call_usermodehelper_exec(struct subprocess_info *sub_info, int wait)
        sub_info->complete = (wait == UMH_NO_WAIT) ? NULL : &done;
        sub_info->wait = wait;
 
-       queue_work(system_unbound_wq, &sub_info->work);
+       queue_work(system_dfl_wq, &sub_info->work);
        if (wait == UMH_NO_WAIT)        /* task has freed sub_info */
                goto unlock;