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Subject[PATCH RT 24/25] lockdep: selftest: fix warnings due to missing PREEMPT_RT conditionals
3.2.68-rt99-rc1 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Josh Cartwright <josh.cartwright@ni.com>

"lockdep: Selftest: Only do hardirq context test for raw spinlock"
disabled the execution of certain tests with PREEMPT_RT_FULL, but did
not prevent the tests from still being defined. This leads to warnings
like:

./linux/lib/locking-selftest.c:574:1: warning: 'irqsafe1_hard_rlock_12' defined but not used [-Wunused-function]
./linux/lib/locking-selftest.c:574:1: warning: 'irqsafe1_hard_rlock_21' defined but not used [-Wunused-function]
./linux/lib/locking-selftest.c:577:1: warning: 'irqsafe1_hard_wlock_12' defined but not used [-Wunused-function]
./linux/lib/locking-selftest.c:577:1: warning: 'irqsafe1_hard_wlock_21' defined but not used [-Wunused-function]
./linux/lib/locking-selftest.c:580:1: warning: 'irqsafe1_soft_spin_12' defined but not used [-Wunused-function]
...

Fixed by wrapping the test definitions in #ifndef CONFIG_PREEMPT_RT_FULL
conditionals.

Cc: stable-rt@vger.kernel.org
Signed-off-by: Josh Cartwright <josh.cartwright@ni.com>
Signed-off-by: Xander Huff <xander.huff@ni.com>
Acked-by: Gratian Crisan <gratian.crisan@ni.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
lib/locking-selftest.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)

diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 507a22fab738..51e558f5c93d 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -570,6 +570,8 @@ GENERATE_TESTCASE(init_held_rsem)
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin)

+#ifndef CONFIG_PREEMPT_RT_FULL
+
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock)

@@ -585,9 +587,12 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock)

+#endif
+
#undef E1
#undef E2

+#ifndef CONFIG_PREEMPT_RT_FULL
/*
* Enabling hardirqs with a softirq-safe lock held:
*/
@@ -620,6 +625,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock)
#undef E1
#undef E2

+#endif
+
/*
* Enabling irqs with an irq-safe lock held:
*/
@@ -643,6 +650,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock)
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin)

+#ifndef CONFIG_PREEMPT_RT_FULL
+
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock)

@@ -658,6 +667,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock)

+#endif
+
#undef E1
#undef E2

@@ -689,6 +700,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock)
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin)

+#ifndef CONFIG_PREEMPT_RT_FULL
+
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock)

@@ -704,6 +717,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock)

+#endif
+
#undef E1
#undef E2
#undef E3
@@ -737,6 +752,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock)
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin)

+#ifndef CONFIG_PREEMPT_RT_FULL
+
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock)

@@ -752,10 +769,14 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock)

+#endif
+
#undef E1
#undef E2
#undef E3

+#ifndef CONFIG_PREEMPT_RT_FULL
+
/*
* read-lock / write-lock irq inversion.
*
@@ -818,6 +839,10 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock)
#undef E2
#undef E3

+#endif
+
+#ifndef CONFIG_PREEMPT_RT_FULL
+
/*
* read-lock / write-lock recursion that is actually safe.
*/
@@ -856,6 +881,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
#undef E2
#undef E3

+#endif
+
/*
* read-lock / write-lock recursion that is unsafe.
*/
--
2.1.4



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