pint_collosion and helper functions are just used when DEBUG_LOCKDEP is selected, so include them in #ifdef CONFIG_DEBUG_LOCKDEP to avoid the below "defined but not used" warning when DEBUG_LOCKDEP is off:
kernel/locking/lockdep.c:2051:13: warning: 'print_collision' defined but not used [-Wunused-function] static void print_collision(struct task_struct *curr,
Signed-off-by: Yang Shi yang.shi@linaro.org --- kernel/locking/lockdep.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 2324ba5..ed94109 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -1999,6 +1999,7 @@ static inline int get_first_held_lock(struct task_struct *curr, return ++i; }
+#ifdef CONFIG_DEBUG_LOCKDEP /* * Returns the next chain_key iteration */ @@ -2069,6 +2070,7 @@ static void print_collision(struct task_struct *curr, printk("\nstack backtrace:\n"); dump_stack(); } +#endif
/* * Checks whether the chain and the current held locks are consistent