From: Sam Ravnborg <sam@ravnborg.org>

Fix following warning:
WARNING: o-x86_64/kernel/built-in.o(.text+0x36d8b): Section mismatch in reference from the function enable_nonboot_cpus() to the function .cpuinit.text:_cpu_up()

enable_nonboot_cpus() are used solely from CONFIG_CONFIG_PM_SLEEP_SMP=y
and PM_SLEEP_SMP imply HOTPLUG_CPU therefore the reference
to _cpu_up() is valid.
Annotate enable_nonboot_cpus() with __ref to silence modpost.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/cpu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN kernel/cpu.c~cpu-fix-section-mismatch-warnings-for-enable_nonboot_cpus kernel/cpu.c
--- a/kernel/cpu.c~cpu-fix-section-mismatch-warnings-for-enable_nonboot_cpus
+++ a/kernel/cpu.c
@@ -389,7 +389,7 @@ int disable_nonboot_cpus(void)
 	return error;
 }
 
-void enable_nonboot_cpus(void)
+void __ref enable_nonboot_cpus(void)
 {
 	int cpu, error;
 
_