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