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Subject: cpu-rt-variants.patch
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 17 Jun 2011 15:42:38 +0200
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
include/linux/smp.h | 8 ++++++++
1 file changed, 8 insertions(+)
Index: linux-stable/include/linux/smp.h
===================================================================
--- linux-stable.orig/include/linux/smp.h
+++ linux-stable/include/linux/smp.h
@@ -218,6 +218,14 @@ static inline void kick_all_cpus_sync(vo
#define get_cpu() ({ preempt_disable(); smp_processor_id(); })
#define put_cpu() preempt_enable()
+#ifndef CONFIG_PREEMPT_RT_FULL
+# define get_cpu_light() get_cpu()
+# define put_cpu_light() put_cpu()
+#else
+# define get_cpu_light() ({ migrate_disable(); smp_processor_id(); })
+# define put_cpu_light() migrate_enable()
+#endif
+
/*
* Callback to arch code if there's nosmp or maxcpus=0 on the
* boot command line:
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