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From: Peter Zijlstra <peterz@infradead.org>
To: mingo@redhat.com, will@kernel.org, longman@redhat.com,
	boqun.feng@gmail.com
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
	joro@8bytes.org, bp@alien8.de, tglx@linutronix.de,
	bigeasy@linutronix.de
Subject: [PATCH 2/3] lockdep/selftests: Fix selftests vs PROVE_RAW_LOCK_NESTING
Date: Thu, 17 Jun 2021 20:57:19 +0200	[thread overview]
Message-ID: <20210617190313.322096283@infradead.org> (raw)
In-Reply-To: 20210617185717.486456641@infradead.org

When PROVE_RAW_LOCK_NESTING=y many of the selftests FAILED because
HARDIRQ context is out-of-bounds for spinlocks. Instead make the
default hardware context the threaded hardirq context, which preserves
the old locking rules.

The wait-type specific locking selftests will have a non-threaded
HARDIRQ variant.

Fixes: de8f5e4f2dc1 ("lockdep: Introduce wait-type checks")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 lib/locking-selftest.c |    1 +
 1 file changed, 1 insertion(+)

--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -194,6 +194,7 @@ static void init_shared_classes(void)
 #define HARDIRQ_ENTER()				\
 	local_irq_disable();			\
 	__irq_enter();				\
+	lockdep_hardirq_threaded();		\
 	WARN_ON(!in_irq());
 
 #define HARDIRQ_EXIT()				\



  parent reply	other threads:[~2021-06-17 19:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-17 18:57 [PATCH 0/3] lockdep: PROVE_RAW_LOCK_NESTING=y fixes Peter Zijlstra
2021-06-17 18:57 ` [PATCH 1/3] lockdep: Fix wait-type for empty stack Peter Zijlstra
2021-06-23  8:19   ` [tip: locking/core] " tip-bot2 for Peter Zijlstra
2021-06-17 18:57 ` Peter Zijlstra [this message]
2021-06-23  8:19   ` [tip: locking/core] lockdep/selftests: Fix selftests vs PROVE_RAW_LOCK_NESTING tip-bot2 for Peter Zijlstra
2021-06-17 18:57 ` [PATCH 3/3] lockdep/selftest: Remove wait-type RCU_CALLBACK tests Peter Zijlstra
2021-06-23  8:19   ` [tip: locking/core] " tip-bot2 for Peter Zijlstra
2021-06-18  9:23 ` [PATCH 0/3] lockdep: PROVE_RAW_LOCK_NESTING=y fixes Joerg Roedel

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