linux-next: build warning after merge of the pm tree

[Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>]

Hi all,

After merging the pm tree, today's linux-next build (x86_64 allmodconfig)
produced this warning:

drivers/acpi/processor_idle.c: In function 'acpi_idle_enter_s2idle':
drivers/acpi/processor_idle.c:666:4: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
  666 |    return;
      |    ^~~~~~
drivers/acpi/processor_idle.c:657:12: note: declared here
  657 | static int acpi_idle_enter_s2idle(struct cpuidle_device *dev,
      |            ^~~~~~~~~~~~~~~~~~~~~~
drivers/acpi/processor_idle.c:670:4: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
  670 |    return;
      |    ^~~~~~
drivers/acpi/processor_idle.c:657:12: note: declared here
  657 | static int acpi_idle_enter_s2idle(struct cpuidle_device *dev,
      |            ^~~~~~~~~~~~~~~~~~~~~~

Introduced by commit

  efe9711214e6 ("cpuidle: change enter_s2idle() prototype")

-- 
Cheers,
Stephen Rothwell

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