livepatch: Replace deprecated CPU-hotplug functions.

The functions get_online_cpus() and put_online_cpus() have been
deprecated during the CPU hotplug rework. They map directly to
cpus_read_lock() and cpus_read_unlock().

Replace deprecated CPU-hotplug functions with the official version.
The behavior remains unchanged.

Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Miroslav Benes <mbenes@suse.cz>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Joe Lawrence <joe.lawrence@redhat.com>
Cc: live-patching@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c
index 3a4beb9395c48c9352ce21e7f108c9530ad61a52..291b857a6e20173901cc68d71f6bbefb6d889494 100644 (file)
--- a/kernel/livepatch/transition.c
+++ b/kernel/livepatch/transition.c
@@ -411,7 +411,7 @@ void klp_try_complete_transition(void)
        /*
         * Ditto for the idle "swapper" tasks.
         */
-       get_online_cpus();
+       cpus_read_lock();
        for_each_possible_cpu(cpu) {
                task = idle_task(cpu);
                if (cpu_online(cpu)) {
@@ -423,7 +423,7 @@ void klp_try_complete_transition(void)
                        task->patch_state = klp_target_state;
                }
        }
-       put_online_cpus();
+       cpus_read_unlock();
 
        if (!complete) {
                if (klp_signals_cnt && !(klp_signals_cnt % SIGNALS_TIMEOUT))