diff options
Diffstat (limited to 'lib/kernel_lock.c')
| -rw-r--r-- | lib/kernel_lock.c | 15 |
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 | */ |
| 117 | void __lockfunc _lock_kernel(void) | 119 | void __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 | ||
| 125 | void __lockfunc _unlock_kernel(void) | 130 | void __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 | ||
| 132 | EXPORT_SYMBOL(_lock_kernel); | 139 | EXPORT_SYMBOL(_lock_kernel); |
