2020-10-12 12:52:06 +00:00
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From 8e0731033be0ec76e778f8842bc560171c0c2706 Mon Sep 17 00:00:00 2001
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Message-Id: <8e0731033be0ec76e778f8842bc560171c0c2706.1601675151.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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2018-08-27 14:32:32 +00:00
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Fri, 24 Jul 2009 12:38:56 +0200
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2020-09-04 20:10:21 +00:00
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Subject: [PATCH 059/333] preempt: Provide preempt_*_(no)rt variants
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2020-10-12 12:52:06 +00:00
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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2018-08-27 14:32:32 +00:00
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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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2019-04-08 23:49:20 +00:00
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include/linux/preempt.h | 18 +++++++++++++++++-
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2018-08-27 14:32:32 +00:00
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1 file changed, 17 insertions(+), 1 deletion(-)
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2019-04-08 23:49:20 +00:00
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diff --git a/include/linux/preempt.h b/include/linux/preempt.h
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index 3196d0e76719..f7a17fcc3fec 100644
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2018-08-27 14:32:32 +00:00
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--- a/include/linux/preempt.h
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+++ b/include/linux/preempt.h
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@@ -181,7 +181,11 @@ 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_BASE
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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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@@ -298,6 +302,18 @@ do { \
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set_preempt_need_resched(); \
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} while (0)
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+#ifdef CONFIG_PREEMPT_RT_FULL
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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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2020-01-03 23:36:11 +00:00
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--
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2020-06-22 13:14:16 +00:00
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2.17.1
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2020-01-03 23:36:11 +00:00
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