The following commit has been merged into the core/rcu branch of tip:
Commit-ID: 822175e72995a9ff7eeef4f5cd3f945f2697b67d
Gitweb: https://git.kernel.org/tip/822175e72995a9ff7eeef4f5cd3f945f2697b67d
Author: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
AuthorDate: Tue, 15 Oct 2019 10:23:56
Committer: Paul E. McKenney <paulmck@xxxxxxxxxx>
CommitterDate: Fri, 24 Jan 2020 10:33:13 -08:00
rcu: Fix harmless omission of "CONFIG_" from #if condition
The C preprocessor macros SRCU and TINY_RCU should instead be CONFIG_SRCU
and CONFIG_TINY_RCU, respectively in the #f in kernel/rcu/rcu.h. But
there is no harm when "TINY_RCU" is wrongly used, which are always
non-defined, which makes "!defined(TINY_RCU)" always true, which means
the code block is always included, and the included code block doesn't
cause any compilation error so far in CONFIG_TINY_RCU builds. It is
also the reason this change should not be taken in -stable.
This commit adds the needed "CONFIG_" prefix to both macros.
Not for -stable.
Signed-off-by: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
kernel/rcu/rcu.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index ab504fb..4732594 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -281,7 +281,7 @@ void rcu_test_sync_prims(void);
*/
extern void resched_cpu(int cpu);
-#if defined(SRCU) || !defined(TINY_RCU)
+#if defined(CONFIG_SRCU) || !defined(CONFIG_TINY_RCU)
#include <linux/rcu_node_tree.h>
@@ -418,7 +418,7 @@ do { \
#define raw_lockdep_assert_held_rcu_node(p) \
lockdep_assert_held(&ACCESS_PRIVATE(p, lock))
-#endif /* #if defined(SRCU) || !defined(TINY_RCU) */
+#endif /* #if defined(CONFIG_SRCU) || !defined(CONFIG_TINY_RCU) */
#ifdef CONFIG_SRCU
void srcu_init(void);
|