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-rw-r--r--lib/kernel_lock.c20
1 files changed, 14 insertions, 6 deletions
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index 39f1029e3525..4ebfa5a164d7 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -5,10 +5,13 @@
5 * relegated to obsolescence, but used by various less 5 * relegated to obsolescence, but used by various less
6 * important (or lazy) subsystems. 6 * important (or lazy) subsystems.
7 */ 7 */
8#include <linux/smp_lock.h>
9#include <linux/module.h> 8#include <linux/module.h>
10#include <linux/kallsyms.h> 9#include <linux/kallsyms.h>
11#include <linux/semaphore.h> 10#include <linux/semaphore.h>
11#include <linux/smp_lock.h>
12
13#define CREATE_TRACE_POINTS
14#include <trace/events/bkl.h>
12 15
13/* 16/*
14 * The 'big kernel lock' 17 * The 'big kernel lock'
@@ -113,21 +116,26 @@ static inline void __unlock_kernel(void)
113 * This cannot happen asynchronously, so we only need to 116 * This cannot happen asynchronously, so we only need to
114 * worry about other CPU's. 117 * worry about other CPU's.
115 */ 118 */
116void __lockfunc lock_kernel(void) 119void __lockfunc _lock_kernel(const char *func, const char *file, int line)
117{ 120{
118 int depth = current->lock_depth+1; 121 int depth = current->lock_depth + 1;
122
123 trace_lock_kernel(func, file, line);
124
119 if (likely(!depth)) 125 if (likely(!depth))
120 __lock_kernel(); 126 __lock_kernel();
121 current->lock_depth = depth; 127 current->lock_depth = depth;
122} 128}
123 129
124void __lockfunc unlock_kernel(void) 130void __lockfunc _unlock_kernel(const char *func, const char *file, int line)
125{ 131{
126 BUG_ON(current->lock_depth < 0); 132 BUG_ON(current->lock_depth < 0);
127 if (likely(--current->lock_depth < 0)) 133 if (likely(--current->lock_depth < 0))
128 __unlock_kernel(); 134 __unlock_kernel();
135
136 trace_unlock_kernel(func, file, line);
129} 137}
130 138
131EXPORT_SYMBOL(lock_kernel); 139EXPORT_SYMBOL(_lock_kernel);
132EXPORT_SYMBOL(unlock_kernel); 140EXPORT_SYMBOL(_unlock_kernel);
133 141