[tip: x86/cleanups] x86/mmiotrace: Replace deprecated CPU-hotplug functions.

From: tip-bot2 for Sebastian Andrzej Siewior
Date: Tue Aug 10 2021 - 08:52:18 EST

The following commit has been merged into the x86/cleanups branch of tip:

Commit-ID: 77ad320cfb2ac172eeba32a77a388281b003ec17
Gitweb: https://git.kernel.org/tip/77ad320cfb2ac172eeba32a77a388281b003ec17
Author: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
AuthorDate: Tue, 03 Aug 2021 16:15:49 +02:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Tue, 10 Aug 2021 14:46:27 +02:00

x86/mmiotrace: 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.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Karol Herbst <kherbst@xxxxxxxxxx>
Reviewed-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210803141621.780504-7-bigeasy@xxxxxxxxxxxxx

arch/x86/mm/mmio-mod.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c
index cd768da..933a2eb 100644
--- a/arch/x86/mm/mmio-mod.c
+++ b/arch/x86/mm/mmio-mod.c
@@ -376,12 +376,12 @@ static void enter_uniprocessor(void)
goto out;

- get_online_cpus();
+ cpus_read_lock();
cpumask_copy(downed_cpus, cpu_online_mask);
cpumask_clear_cpu(cpumask_first(cpu_online_mask), downed_cpus);
if (num_online_cpus() > 1)
pr_notice("Disabling non-boot CPUs...\n");
- put_online_cpus();
+ cpus_read_unlock();

for_each_cpu(cpu, downed_cpus) {
err = remove_cpu(cpu);