/*
* Getting the big kernel lock.
*
* This cannot happen asynchronously, so we only need to
* worry about other CPU's.
*/
void __lockfunc _lock_kernel(const char *func, const char *file, int line)
{
int depth = current->lock_depth + 1;
trace_lock_kernel(func, file, line);
if (likely(!depth)) {
might_sleep();
__lock_kernel();
}
current->lock_depth = depth;
}
/*
* Getting the big kernel semaphore.
*/
void __lockfunc _lock_kernel(const char *func, const char *file, int line)
{
int depth = current->lock_depth + 1;
trace_lock_kernel(func, file, line);
if (likely(!depth)) {
might_sleep();
/*
* No recursion worries - we set up lock_depth _after_
*/
mutex_lock(&kernel_sem);
#ifdef CONFIG_DEBUG_RT_MUTEXES
current->last_kernel_lock = __builtin_return_address(0);
#endif
}
current->lock_depth = depth;
}
