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-rw-r--r--lib/kernel_lock.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index 5c10b2e1fd08..4ebfa5a164d7 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -8,9 +8,11 @@
8#include <linux/module.h> 8#include <linux/module.h>
9#include <linux/kallsyms.h> 9#include <linux/kallsyms.h>
10#include <linux/semaphore.h> 10#include <linux/semaphore.h>
11#define CREATE_TRACE_POINTS
12#include <linux/smp_lock.h> 11#include <linux/smp_lock.h>
13 12
13#define CREATE_TRACE_POINTS
14#include <trace/events/bkl.h>
15
14/* 16/*
15 * The 'big kernel lock' 17 * The 'big kernel lock'
16 * 18 *
@@ -114,19 +116,24 @@ static inline void __unlock_kernel(void)
114 * This cannot happen asynchronously, so we only need to 116 * This cannot happen asynchronously, so we only need to
115 * worry about other CPU's. 117 * worry about other CPU's.
116 */ 118 */
117void __lockfunc _lock_kernel(void) 119void __lockfunc _lock_kernel(const char *func, const char *file, int line)
118{ 120{
119 int depth = current->lock_depth+1; 121 int depth = current->lock_depth + 1;
122
123 trace_lock_kernel(func, file, line);
124
120 if (likely(!depth)) 125 if (likely(!depth))
121 __lock_kernel(); 126 __lock_kernel();
122 current->lock_depth = depth; 127 current->lock_depth = depth;
123} 128}
124 129
125void __lockfunc _unlock_kernel(void) 130void __lockfunc _unlock_kernel(const char *func, const char *file, int line)
126{ 131{
127 BUG_ON(current->lock_depth < 0); 132 BUG_ON(current->lock_depth < 0);
128 if (likely(--current->lock_depth < 0)) 133 if (likely(--current->lock_depth < 0))
129 __unlock_kernel(); 134 __unlock_kernel();
135
136 trace_unlock_kernel(func, file, line);
130} 137}
131 138
132EXPORT_SYMBOL(_lock_kernel); 139EXPORT_SYMBOL(_lock_kernel);