Merge tag 'smp-core-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull core SMP updates from Thomas Gleixner:
 "CPU (hotplug) updates:

   - Support for locked CSD objects in smp_call_function_single_async()
     which allows to simplify callsites in the scheduler core and MIPS

   - Treewide consolidation of CPU hotplug functions which ensures the
     consistency between the sysfs interface and kernel state. The low
     level functions cpu_up/down() are now confined to the core code and
     not longer accessible from random code"

* tag 'smp-core-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
  cpu/hotplug: Ignore pm_wakeup_pending() for disable_nonboot_cpus()
  cpu/hotplug: Hide cpu_up/down()
  cpu/hotplug: Move bringup of secondary CPUs out of smp_init()
  torture: Replace cpu_up/down() with add/remove_cpu()
  firmware: psci: Replace cpu_up/down() with add/remove_cpu()
  xen/cpuhotplug: Replace cpu_up/down() with device_online/offline()
  parisc: Replace cpu_up/down() with add/remove_cpu()
  sparc: Replace cpu_up/down() with add/remove_cpu()
  powerpc: Replace cpu_up/down() with add/remove_cpu()
  x86/smp: Replace cpu_up/down() with add/remove_cpu()
  arm64: hibernate: Use bringup_hibernate_cpu()
  cpu/hotplug: Provide bringup_hibernate_cpu()
  arm64: Use reboot_cpu instead of hardconding it to 0
  arm64: Don't use disable_nonboot_cpus()
  ARM: Use reboot_cpu instead of hardcoding it to 0
  ARM: Don't use disable_nonboot_cpus()
  ia64: Replace cpu_down() with smp_shutdown_nonboot_cpus()
  cpu/hotplug: Create a new function to shutdown nonboot cpus
  cpu/hotplug: Add new {add,remove}_cpu() functions
  sched/core: Remove rq.hrtick_csd_pending
  ...

diff --cc arch/ia64/kernel/process.c
Simple merge

diff --cc drivers/base/cpu.c
Simple merge

diff --cc kernel/cpu.c
Simple merge

diff --cc kernel/sched/core.c
Simple merge

diff --cc kernel/sched/sched.h
Simple merge

diff --cc kernel/torture.c
index 8683375,a479689..a1a4148
--- 1/kernel/torture.c
--- 2/kernel/torture.c
+++ b/kernel/torture.c
@@@ -101,18 -97,12 +101,18 @@@ bool torture_offline(int cpu, long *n_o
                         torture_type, cpu);
        starttime = jiffies;
        (*n_offl_attempts)++;
-       ret = cpu_down(cpu);
+       ret = remove_cpu(cpu);
        if (ret) {
 +              s = "";
 +              if (!rcu_inkernel_boot_has_ended() && ret == -EBUSY) {
 +                      // PCI probe frequently disables hotplug during boot.
 +                      (*n_offl_attempts)--;
 +                      s = " (-EBUSY forgiven during boot)";
 +              }
                if (verbose)
                        pr_alert("%s" TORTURE_FLAG
 -                               "torture_onoff task: offline %d failed: errno %d\n",
 -                               torture_type, cpu, ret);
 +                               "torture_onoff task: offline %d failed%s: errno %d\n",
 +                               torture_type, cpu, s, ret);
        } else {
                if (verbose > 1)
                        pr_alert("%s" TORTURE_FLAG
@@@ -159,18 -148,12 +159,18 @@@ bool torture_online(int cpu, long *n_on
                         torture_type, cpu);
        starttime = jiffies;
        (*n_onl_attempts)++;
-       ret = cpu_up(cpu);
+       ret = add_cpu(cpu);
        if (ret) {
 +              s = "";
 +              if (!rcu_inkernel_boot_has_ended() && ret == -EBUSY) {
 +                      // PCI probe frequently disables hotplug during boot.
 +                      (*n_onl_attempts)--;
 +                      s = " (-EBUSY forgiven during boot)";
 +              }
                if (verbose)
                        pr_alert("%s" TORTURE_FLAG
 -                               "torture_onoff task: online %d failed: errno %d\n",
 -                               torture_type, cpu, ret);
 +                               "torture_onoff task: online %d failed%s: errno %d\n",
 +                               torture_type, cpu, s, ret);
        } else {
                if (verbose > 1)
                        pr_alert("%s" TORTURE_FLAG