From: Joel Fernandes (Google) Date: Tue, 26 Mar 2019 19:24:08 +0000 (-0400) Subject: lockdep: Add assertion to check if in an interrupt X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=71d8d1531e0904e08adf1540e191bd707dfd73da;p=linux.git 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 Cc: kernel-team@android.com Cc: rcu@vger.kernel.org Signed-off-by: Joel Fernandes (Google) Signed-off-by: Paul E. McKenney --- diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 6e2377e6c1d60..e8eef38b2213c 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