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authorBart Van Assche <bvanassche@acm.org>2019-02-15 02:00:44 +0300
committerIngo Molnar <mingo@kernel.org>2019-02-28 09:55:43 +0300
commitcdc84d794947b5431c0a6916c303aee7114819d2 (patch)
treeed685700c082db656b3ae7db4fc8977b451eb709 /lib/locking-selftest.c
parent956f3563a8387beb7758f2e8ee483639ef91afc6 (diff)
downloadlinux-cdc84d794947b5431c0a6916c303aee7114819d2.tar.xz
locking/lockdep: Make it easy to detect whether or not inside a selftest
The patch that frees unused lock classes will modify the behavior of lockdep_free_key_range() and lockdep_reset_lock() depending on whether or not these functions are called from the context of the lockdep selftests. Hence make it easy to detect whether or not lockdep code is called from the context of a lockdep selftest. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <longman@redhat.com> Cc: Will Deacon <will.deacon@arm.com> Cc: johannes.berg@intel.com Cc: tj@kernel.org Link: https://lkml.kernel.org/r/20190214230058.196511-10-bvanassche@acm.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/locking-selftest.c')
-rw-r--r--lib/locking-selftest.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 1e1bbf171eca..a1705545e6ac 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -1989,6 +1989,7 @@ void locking_selftest(void)
init_shared_classes();
debug_locks_silent = !debug_locks_verbose;
+ lockdep_set_selftest_task(current);
DO_TESTCASE_6R("A-A deadlock", AA);
DO_TESTCASE_6R("A-B-B-A deadlock", ABBA);
@@ -2097,5 +2098,6 @@ void locking_selftest(void)
printk("---------------------------------\n");
debug_locks = 1;
}
+ lockdep_set_selftest_task(NULL);
debug_locks_silent = 0;
}