[tip: locking/core] lockdep/selftests: Fix selftests vs PROVE_RAW_LOCK_NESTING

[tip-bot2 for Peter Zijlstra]

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

Commit-ID:     c0c2c0dad6a06e0c05e9a52d65f932bd54364c97
Gitweb:        https://git.kernel.org/tip/c0c2c0dad6a06e0c05e9a52d65f932bd54364c97
Author:        Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate:    Thu, 17 Jun 2021 20:57:19 +02:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Tue, 22 Jun 2021 16:42:08 +02:00

lockdep/selftests: Fix selftests vs PROVE_RAW_LOCK_NESTING

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@xxxxxxxxxxxxx>
Tested-by: Joerg Roedel <jroedel@xxxxxxx>
Link: https://lore.kernel.org/r/20210617190313.322096283@xxxxxxxxxxxxx
---
 lib/locking-selftest.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 5c50b09..af12e84 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -195,6 +195,7 @@ static void init_shared_classes(void)
 #define HARDIRQ_ENTER()				\
 	local_irq_disable();			\
 	__irq_enter();				\
+	lockdep_hardirq_threaded();		\
 	WARN_ON(!in_irq());
 
 #define HARDIRQ_EXIT()				\