lockdep: Provide off case for redundant_hardirqs_on increment

We forgot to provide a !CONFIG_DEBUG_LOCKDEP case for the
redundant_hardirqs_on stat handling.

Manage that in the headers with a new __debug_atomic_inc() helper.

Fixes:

	kernel/lockdep.c:2306: error: 'lockdep_stats' undeclared (first use in this function)
	kernel/lockdep.c:2306: error: (Each undeclared identifier is reported only once
	kernel/lockdep.c:2306: error: for each function it appears in.)

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 1b58a1b..9cf7985 100644 (file)
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -2303,7 +2303,7 @@ void trace_hardirqs_on_caller(unsigned long ip)
                 * so this is racy by nature but loosing one hit
                 * in a stat is not a big deal.
                 */
-               this_cpu_inc(lockdep_stats.redundant_hardirqs_on);
+               __debug_atomic_inc(redundant_hardirqs_on);
                return;
        }
        /* we'll do an OFF -> ON transition: */

diff --git a/kernel/lockdep_internals.h b/kernel/lockdep_internals.h
index 2b17476..7de27a8 100644 (file)
--- a/kernel/lockdep_internals.h
+++ b/kernel/lockdep_internals.h
@@ -139,6 +139,9 @@ struct lockdep_stats {
 
 DECLARE_PER_CPU(struct lockdep_stats, lockdep_stats);
 
+#define __debug_atomic_inc(ptr)                                        \
+       this_cpu_inc(lockdep_stats.ptr);
+
 #define debug_atomic_inc(ptr)                  {               \
        WARN_ON_ONCE(!irqs_disabled());                         \
        this_cpu_inc(lockdep_stats.ptr);                        \
@@ -160,6 +163,7 @@ DECLARE_PER_CPU(struct lockdep_stats, lockdep_stats);
        __total;                                                        \
 })
 #else
+# define __debug_atomic_inc(ptr)       do { } while (0)
 # define debug_atomic_inc(ptr)         do { } while (0)
 # define debug_atomic_dec(ptr)         do { } while (0)
 # define debug_atomic_read(ptr)                0