Commit-ID: 71d8d1531e0904e08adf1540e191bd707dfd73da
Gitweb: https://git.kernel.org/tip/71d8d1531e0904e08adf1540e191bd707dfd73da
Author: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 26 Mar 2019 15:24:08 -0400
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
CommitDate: Sat, 25 May 2019 14:50:51 -0700
lockdep: Add assertion to check if in an interrupt
In rcu_rrupt_from_idle, we want to check if it is called from within an
interrupt, but want to do such checking only for debug builds. lockdep
already tracks when we enter an interrupt. Let us expose it as an
assertion macro so it can be used to assert this.
Suggested-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: kernel-team@xxxxxxxxxxx
Cc: rcu@xxxxxxxxxxxxxxx
Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
---
include/linux/lockdep.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 6e2377e6c1d6..e8eef38b2213 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -632,11 +632,18 @@ do { \
"IRQs not disabled as expected\n"); \
} while (0)
+#define lockdep_assert_in_irq() do { \
+ WARN_ONCE(debug_locks && !current->lockdep_recursion && \
+ !current->hardirq_context, \
+ "Not in hardirq as expected\n"); \
+ } while (0)
+
#else
# define might_lock(lock) do { } while (0)
# define might_lock_read(lock) do { } while (0)
# define lockdep_assert_irqs_enabled() do { } while (0)
# define lockdep_assert_irqs_disabled() do { } while (0)
+# define lockdep_assert_in_irq() do { } while (0)
#endif
#ifdef CONFIG_LOCKDEP
|