82 lines
2.5 KiB
Diff
82 lines
2.5 KiB
Diff
From 7edb870b3cb0a0754dba67e4d755931b5fd9b05a Mon Sep 17 00:00:00 2001
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Message-Id: <7edb870b3cb0a0754dba67e4d755931b5fd9b05a.1601675152.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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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Sun, 17 Jul 2011 18:51:23 +0200
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Subject: [PATCH 117/333] lockdep: Make it RT aware
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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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teach lockdep that we don't really do softirqs on -RT.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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include/linux/irqflags.h | 23 +++++++++++++++--------
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kernel/locking/lockdep.c | 2 ++
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2 files changed, 17 insertions(+), 8 deletions(-)
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diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
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index 21619c92c377..b20eeb25e9fa 100644
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--- a/include/linux/irqflags.h
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+++ b/include/linux/irqflags.h
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@@ -43,14 +43,6 @@ do { \
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do { \
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current->hardirq_context--; \
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} while (0)
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-# define lockdep_softirq_enter() \
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-do { \
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- current->softirq_context++; \
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-} while (0)
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-# define lockdep_softirq_exit() \
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-do { \
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- current->softirq_context--; \
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-} while (0)
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#else
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# define trace_hardirqs_on() do { } while (0)
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# define trace_hardirqs_off() do { } while (0)
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@@ -64,6 +56,21 @@ do { \
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# define lockdep_softirq_exit() do { } while (0)
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#endif
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+#if defined(CONFIG_TRACE_IRQFLAGS) && !defined(CONFIG_PREEMPT_RT_FULL)
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+# define lockdep_softirq_enter() \
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+do { \
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+ current->softirq_context++; \
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+} while (0)
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+# define lockdep_softirq_exit() \
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+do { \
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+ current->softirq_context--; \
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+} while (0)
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+
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+#else
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+# define lockdep_softirq_enter() do { } while (0)
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+# define lockdep_softirq_exit() do { } while (0)
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+#endif
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+
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#if defined(CONFIG_IRQSOFF_TRACER) || \
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defined(CONFIG_PREEMPT_TRACER)
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extern void stop_critical_timings(void);
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diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
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index 8a1758b094b7..376b1ef4396a 100644
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--- a/kernel/locking/lockdep.c
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+++ b/kernel/locking/lockdep.c
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@@ -3830,6 +3830,7 @@ static void check_flags(unsigned long flags)
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}
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}
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+#ifndef CONFIG_PREEMPT_RT_FULL
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/*
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* We dont accurately track softirq state in e.g.
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* hardirq contexts (such as on 4KSTACKS), so only
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@@ -3844,6 +3845,7 @@ static void check_flags(unsigned long flags)
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DEBUG_LOCKS_WARN_ON(!current->softirqs_enabled);
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}
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}
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+#endif
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if (!debug_locks)
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print_irqtrace_events(current);
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--
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2.17.1
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