ACPI: Reevaluate whether the T-state is supported or not after cpu is online/offline

[~andy/linux] / kernel / printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index 9a2264fc42cafac30d9264d569e4e673e9617f19..a23315dc4498844c113cecc9792eabd063e1d87b 100644 (file)
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1082,13 +1082,15 @@ void printk_tick(void)
 
 int printk_needs_cpu(int cpu)
 {
+       if (unlikely(cpu_is_offline(cpu)))
+               printk_tick();
        return per_cpu(printk_pending, cpu);
 }
 
 void wake_up_klogd(void)
 {
        if (waitqueue_active(&log_wait))
-               __raw_get_cpu_var(printk_pending) = 1;
+               this_cpu_write(printk_pending, 1);
 }
 
 /**