tools/liblockdep: Build failure

From: Eunbong Song
Date: Tue Apr 01 2014 - 02:06:03 EST

There is tools/liblockdep build failure.
I have been trying to find the cause and i found commit id 63f9a7fde715352e0769302527670542a664b981 is the casue.

Author: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Date: Sat Feb 8 08:52:01 2014 +0100

asmlinkage: Make lockdep_sys_exit asmlinkage

lockdep_sys_exit can be called from assembler code, so make it

Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 92b1bfc..7df9aa6 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -265,7 +265,7 @@ extern void lockdep_info(void);
extern void lockdep_reset(void);
extern void lockdep_reset_lock(struct lockdep_map *lock);
extern void lockdep_free_key_range(void *start, unsigned long size);
-extern void lockdep_sys_exit(void);
+extern asmlinkage void lockdep_sys_exit(void);

extern void lockdep_off(void);
extern void lockdep_on(void);
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index eb8a547..c8b6753 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4191,7 +4191,7 @@ void debug_show_held_locks(struct task_struct *task)

-void lockdep_sys_exit(void)
+asmlinkage void lockdep_sys_exit(void)
struct task_struct *curr = current;