linux-kernel - [PATCH v2 05/12] tools/lib/lockdep: add definition required for IRQ flag tracing

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Date:   Sat, 18 Apr 2020 21:57:47 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     mingo@...nel.org, peterz@...radead.org
Cc:     linux-kernel@...r.kernel.org, tglx@...utronix.de, jolsa@...hat.com,
        alexey.budankov@...ux.intel.com, songliubraving@...com,
        acme@...hat.com, allison@...utok.net,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH v2 05/12] tools/lib/lockdep: add definition required for IRQ flag tracing

We are going to start building with CONFIG_TRACE_IRQFLAGS defined, so
let's wire up a few dummy variables in our task_struct.

This isn't needed in userspace, but due to some refactoring in
kernel-side lockdep it's easier to just wire it up and enable
CONFIG_TRACE_IRQFLAGS.

Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/include/linux/lockdep.h | 8 ++++++++
 tools/lib/lockdep/lockdep.c   | 4 ++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/include/linux/lockdep.h b/tools/include/linux/lockdep.h
index e56997288f2b0..3a9924d6d3ae8 100644
--- a/tools/include/linux/lockdep.h
+++ b/tools/include/linux/lockdep.h
@@ -23,6 +23,8 @@
 
 #include "../../../include/linux/lockdep.h"
 
+static bool early_boot_irqs_disabled;
+
 struct task_struct {
 	u64 curr_chain_key;
 	int lockdep_depth;
@@ -31,6 +33,12 @@ struct task_struct {
 	gfp_t lockdep_reclaim_gfp;
 	int pid;
 	int state;
+	int softirqs_enabled, hardirqs_enabled, softirqs_disabled, hardirqs_disabled, irq_events;
+	unsigned long softirq_disable_ip, softirq_enable_ip;
+	unsigned int softirq_disable_event, softirq_enable_event;
+	unsigned long hardirq_disable_ip, hardirq_enable_ip;
+	unsigned int hardirq_disable_event, hardirq_enable_event;
+	int softirq_context, hardirq_context;
 	char comm[17];
 };
 
diff --git a/tools/lib/lockdep/lockdep.c b/tools/lib/lockdep/lockdep.c
index 348a9d0fb766a..9be12d233477a 100644
--- a/tools/lib/lockdep/lockdep.c
+++ b/tools/lib/lockdep/lockdep.c
@@ -15,10 +15,10 @@ u32 prandom_u32(void)
 	abort();
 }
 
-void print_irqtrace_events(struct task_struct *curr)
+/*void print_irqtrace_events(struct task_struct *curr)
 {
 	abort();
-}
+}*/
 
 static struct new_utsname *init_utsname(void)
 {
-- 
2.20.1