1 files changed, 53 insertions, 0 deletions
diff --git a/patches/preempt__Provide_preempt__nort_variants.patch b/patches/preempt__Provide_preempt__nort_variants.patch
new file mode 100644
index 000000000000..fc7e65c345fe
--- /dev/null
+++ b/patches/preempt__Provide_preempt__nort_variants.patch
@@ -0,0 +1,53 @@
+Subject: preempt: Provide preempt_*_(no)rt variants
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Fri Jul 24 12:38:56 2009 +0200
+
+From: Thomas Gleixner <tglx@linutronix.de>
+
+RT needs a few preempt_disable/enable points which are not necessary
+otherwise. Implement variants to avoid #ifdeffery.
+
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+
+
+
+---
+ include/linux/preempt.h | 18 +++++++++++++++++-
+ 1 file changed, 17 insertions(+), 1 deletion(-)
+---
+diff --git a/include/linux/preempt.h b/include/linux/preempt.h
+index 4d244e295e85..5ceac863e729 100644
+--- a/include/linux/preempt.h
++++ b/include/linux/preempt.h
+@@ -188,7 +188,11 @@ do { \
+ 	preempt_count_dec(); \
+ } while (0)
+ 
+-#define preempt_enable_no_resched() sched_preempt_enable_no_resched()
++#ifdef CONFIG_PREEMPT_RT
++# define preempt_enable_no_resched() sched_preempt_enable_no_resched()
++#else
++# define preempt_enable_no_resched() preempt_enable()
++#endif
+ 
+ #define preemptible()	(preempt_count() == 0 && !irqs_disabled())
+ 
+@@ -282,6 +286,18 @@ do { \
+ 		set_preempt_need_resched(); \
+ } while (0)
+ 
++#ifdef CONFIG_PREEMPT_RT
++# define preempt_disable_rt()		preempt_disable()
++# define preempt_enable_rt()		preempt_enable()
++# define preempt_disable_nort()		barrier()
++# define preempt_enable_nort()		barrier()
++#else
++# define preempt_disable_rt()		barrier()
++# define preempt_enable_rt()		barrier()
++# define preempt_disable_nort()		preempt_disable()
++# define preempt_enable_nort()		preempt_enable()
++#endif
++
+ #ifdef CONFIG_PREEMPT_NOTIFIERS
+ 
+ struct preempt_notifier;