[PATCH 1/3] lockdep: Add #include <linux/instruction_pointer.h> to lockdep.h

[Steven Rostedt]

From: Steven Rostedt <rostedt@xxxxxxxxxxx>

On 32bit x86, _THIS_IP_ is not defined in asm/linkage.h. It happens to get
included into lockdep.h via kernel.h pulling in trace_printk.h which
includes instruction_pointer.h that has _THIS_IP_ defined when linkage.h
does not.

In order to remove trace_printk.h from kernel.h, have lockdep.h include
instruction_pointer.h directly.

Reviewed-by: Yury Norov <yury.norov@xxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 include/linux/lockdep.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index a6451ecbbe9a..c6b0168f5fc9 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -22,6 +22,7 @@ struct task_struct;
 #include <linux/list.h>
 #include <linux/debug_locks.h>
 #include <linux/stacktrace.h>
+#include <linux/instruction_pointer.h> /* In case _THIS_IP_ isn't defined */
 
 static inline void lockdep_copy_map(struct lockdep_map *to,
 				    struct lockdep_map *from)
-- 
2.53.0