linux-kernel - [tip: locking/core] lockdep/selftest: Remove wait-type RCU

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Date:   Wed, 23 Jun 2021 08:19:07 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Joerg Roedel <jroedel@...e.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: locking/core] lockdep/selftest: Remove wait-type RCU_CALLBACK tests

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     1a8122960484b19d8d887fb32e1cf42be5647533
Gitweb:        https://git.kernel.org/tip/1a8122960484b19d8d887fb32e1cf42be5647533
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Thu, 17 Jun 2021 20:57:20 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 22 Jun 2021 16:42:08 +02:00

lockdep/selftest: Remove wait-type RCU_CALLBACK tests

The problem is that rcu_callback_map doesn't have wait_types defined,
and doing so would make it indistinguishable from SOFTIRQ in any case.
Remove it.

Fixes: 9271a40d2a14 ("lockdep/selftest: Add wait context selftests")
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Tested-by: Joerg Roedel <jroedel@...e.de>
Link: https://lore.kernel.org/r/20210617190313.384290291@infradead.org
---
 lib/locking-selftest.c | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index af12e84..161108e 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -2494,16 +2494,6 @@ static void rcu_sched_exit(int *_)
 	int rcu_sched_guard_##name __guard(rcu_sched_exit);	\
 	rcu_read_lock_sched();
 
-static void rcu_callback_exit(int *_)
-{
-	rcu_lock_release(&rcu_callback_map);
-}
-
-#define RCU_CALLBACK_CONTEXT(name, ...)					\
-	int rcu_callback_guard_##name __guard(rcu_callback_exit);	\
-	rcu_lock_acquire(&rcu_callback_map);
-
-
 static void raw_spinlock_exit(raw_spinlock_t **lock)
 {
 	raw_spin_unlock(*lock);
@@ -2560,8 +2550,6 @@ static void __maybe_unused inner##_in_##outer(void)				\
  * ---------------+-------+----------+------+-------
  * RCU_BH         |   o   |    o     |  o   |  x
  * ---------------+-------+----------+------+-------
- * RCU_CALLBACK   |   o   |    o     |  o   |  x
- * ---------------+-------+----------+------+-------
  * RCU_SCHED      |   o   |    o     |  x   |  x
  * ---------------+-------+----------+------+-------
  * RAW_SPIN       |   o   |    o     |  x   |  x
@@ -2578,7 +2566,6 @@ GENERATE_2_CONTEXT_TESTCASE(NOTTHREADED_HARDIRQ, , inner, inner_lock)		\
 GENERATE_2_CONTEXT_TESTCASE(SOFTIRQ, , inner, inner_lock)			\
 GENERATE_2_CONTEXT_TESTCASE(RCU, , inner, inner_lock)				\
 GENERATE_2_CONTEXT_TESTCASE(RCU_BH, , inner, inner_lock)			\
-GENERATE_2_CONTEXT_TESTCASE(RCU_CALLBACK, , inner, inner_lock)			\
 GENERATE_2_CONTEXT_TESTCASE(RCU_SCHED, , inner, inner_lock)			\
 GENERATE_2_CONTEXT_TESTCASE(RAW_SPINLOCK, raw_lock_A, inner, inner_lock)	\
 GENERATE_2_CONTEXT_TESTCASE(SPINLOCK, lock_A, inner, inner_lock)		\
@@ -2640,10 +2627,6 @@ static void wait_context_tests(void)
 	DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(RCU_BH);
 	pr_cont("\n");
 
-	print_testname("in RCU callback context");
-	DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(RCU_CALLBACK);
-	pr_cont("\n");
-
 	print_testname("in RCU-sched context");
 	DO_CONTEXT_TESTCASE_OUTER_NOT_PREEMPTIBLE(RCU_SCHED);
 	pr_cont("\n");