locking/lockdep: Fix print_collision() unused warning

suryasaimadhu · Ingo Molnar · commit 5c8a010c2411 · 2016-04-04T11:41:34.000+02:00
Fix this: 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: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1459759327-2880-1-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git 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

Original file line number	Diff line number	Diff line change
`@@ -1999,6 +1999,7 @@ static inline int get_first_held_lock(struct task_struct *curr,`
`1999`	`1999`	`return ++i;`
`2000`	`2000`	`}`
`2001`	`2001`
	`2002`	`+#ifdef CONFIG_DEBUG_LOCKDEP`
`2002`	`2003`	`/*`
`2003`	`2004`	`* Returns the next chain_key iteration`
`2004`	`2005`	`*/`
`@@ -2069,6 +2070,7 @@ static void print_collision(struct task_struct *curr,`
`2069`	`2070`	`printk("\nstack backtrace:\n");`
`2070`	`2071`	`dump_stack();`
`2071`	`2072`	`}`
	`2073`	`+#endif`
`2072`	`2074`
`2073`	`2075`	`/*`
`2074`	`2076`	`* Checks whether the chain and the current held locks are consistent`