ftrace: lockdep notrace annotations
Add notrace annotations to lockdep to keep ftrace from causing
recursive problems with lock tracing and debugging.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index e219243..ac46847 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -271,14 +271,14 @@
((key1) >> (64-MAX_LOCKDEP_KEYS_BITS)) ^ \
(key2))
-void lockdep_off(void)
+notrace void lockdep_off(void)
{
current->lockdep_recursion++;
}
EXPORT_SYMBOL(lockdep_off);
-void lockdep_on(void)
+notrace void lockdep_on(void)
{
current->lockdep_recursion--;
}
@@ -1041,7 +1041,7 @@
* Return 1 otherwise and keep <backwards_match> unchanged.
* Return 0 on error.
*/
-static noinline int
+static noinline notrace int
find_usage_backwards(struct lock_class *source, unsigned int depth)
{
struct lock_list *entry;
@@ -1591,7 +1591,7 @@
* We are building curr_chain_key incrementally, so double-check
* it from scratch, to make sure that it's done correctly:
*/
-static void check_chain_key(struct task_struct *curr)
+static notrace void check_chain_key(struct task_struct *curr)
{
#ifdef CONFIG_DEBUG_LOCKDEP
struct held_lock *hlock, *prev_hlock = NULL;
@@ -1967,7 +1967,7 @@
/*
* Mark all held locks with a usage bit:
*/
-static int
+static notrace int
mark_held_locks(struct task_struct *curr, int hardirq)
{
enum lock_usage_bit usage_bit;
@@ -2260,8 +2260,8 @@
/*
* Mark a lock with a usage bit, and validate the state transition:
*/
-static int mark_lock(struct task_struct *curr, struct held_lock *this,
- enum lock_usage_bit new_bit)
+static notrace int mark_lock(struct task_struct *curr, struct held_lock *this,
+ enum lock_usage_bit new_bit)
{
unsigned int new_mask = 1 << new_bit, ret = 1;
@@ -2663,7 +2663,7 @@
/*
* Check whether we follow the irq-flags state precisely:
*/
-static void check_flags(unsigned long flags)
+static notrace void check_flags(unsigned long flags)
{
#if defined(CONFIG_DEBUG_LOCKDEP) && defined(CONFIG_TRACE_IRQFLAGS)
if (!debug_locks)
@@ -2700,8 +2700,8 @@
* We are not always called with irqs disabled - do that here,
* and also avoid lockdep recursion:
*/
-void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
- int trylock, int read, int check, unsigned long ip)
+notrace void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
+ int trylock, int read, int check, unsigned long ip)
{
unsigned long flags;
@@ -2723,7 +2723,8 @@
EXPORT_SYMBOL_GPL(lock_acquire);
-void lock_release(struct lockdep_map *lock, int nested, unsigned long ip)
+notrace void lock_release(struct lockdep_map *lock, int nested,
+ unsigned long ip)
{
unsigned long flags;