[PATCH] [RT] preempt_disable_rt for CONFIG_PREEMPT_RT

[Tim Blechmann]

in some cases, spinlocks are used to avoid preemption. does not work
correctly, when CONFIG_PREEMPT_RT is enabled.

therefore two new macros are introduced:
preempt_disable_rt/preempt_disable_rt behave like their equivalents, if
CONFIG_PREEMPT_RT is enabled, and as noops otherwise.

Signed-off-by: Tim Blechmann <tim@xxxxxxxxxx>
---
 include/linux/preempt.h |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/include/linux/preempt.h b/include/linux/preempt.h
index 72b1a10..2526170 100644
--- a/include/linux/preempt.h
+++ b/include/linux/preempt.h
@@ -93,6 +93,16 @@ do { \
 
 #endif
 
+#ifdef CONFIG_PREEMPT_RT
+#define preempt_disable_rt	preempt_disable
+#define preempt_enable_rt	preempt_enable
+#else
+#define
+#define preempt_disable_rt	do { } while (0)
+#define preempt_enable_rt	do { } while (0)
+#endif
+
+
 #ifdef CONFIG_PREEMPT_NOTIFIERS
 
 struct preempt_notifier;
-- 
1.5.6.3

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