linux-kernel - [tip: locking/core] Revert "locking/lockdep/selftests: Fix mixed read-write ABBA tests"

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Date:   Thu, 27 Aug 2020 07:54:15 -0000
From:   "tip-bot2 for Boqun Feng" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Boqun Feng <boqun.feng@...il.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: locking/core] Revert "locking/lockdep/selftests: Fix mixed
 read-write ABBA tests"

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

Commit-ID:     108dc42ed3507fe06214d51ab15fca7771df8bbd
Gitweb:        https://git.kernel.org/tip/108dc42ed3507fe06214d51ab15fca7771df8bbd
Author:        Boqun Feng <boqun.feng@...il.com>
AuthorDate:    Fri, 07 Aug 2020 15:42:36 +08:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 26 Aug 2020 12:42:07 +02:00

Revert "locking/lockdep/selftests: Fix mixed read-write ABBA tests"

This reverts commit d82fed75294229abc9d757f08a4817febae6c4f4.

Since we now could handle mixed read-write deadlock detection well, the
self tests could be detected as expected, no need to use this
work-around.

Signed-off-by: Boqun Feng <boqun.feng@...il.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/20200807074238.1632519-18-boqun.feng@gmail.com
---
 lib/locking-selftest.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 76c314a..4264cf4 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -2273,14 +2273,6 @@ void locking_selftest(void)
 	print_testname("mixed read-lock/lock-write ABBA");
 	pr_cont("             |");
 	dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK);
-#ifdef CONFIG_PROVE_LOCKING
-	/*
-	 * Lockdep does indeed fail here, but there's nothing we can do about
-	 * that now.  Don't kill lockdep for it.
-	 */
-	unexpected_testcase_failures--;
-#endif
-
 	pr_cont("             |");
 	dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM);