Merge pull request torvalds#181 from liuyuan10/wb

lkl: Remove sem_get and lkl_syscall_wouldblock

Author: Octavian Purdila

arch/lkl/include/uapi/asm/host_ops.h

@@ -24,8 +24,6 @@ typedef unsigned long lkl_thread_t;
  * @sem_free - free a host semaphore
  * @sem_up - perform an up operation on the semaphore
  * @sem_down - perform a down operation on the semaphore
- * @sem_get - return the current value of semahpore. To be used only for sanity
- * checking
  *
  * @mutex_alloc - allocate and initialize a host mutex
  * @mutex_free - free a host mutex
@@ -76,7 +74,6 @@ struct lkl_host_operations {
 	void (*sem_free)(struct lkl_sem *sem);
 	void (*sem_up)(struct lkl_sem *sem);
 	void (*sem_down)(struct lkl_sem *sem);
-	int (*sem_get)(struct lkl_sem *sem);
 
 	struct lkl_mutex *(*mutex_alloc)(void);
 	void (*mutex_free)(struct lkl_mutex *mutex);

arch/lkl/kernel/syscalls.c

@@ -180,14 +180,6 @@ static int syscall_thread_data_init(struct syscall_thread_data *data,
 	return 0;
 }
 
-static int lkl_syscall_wouldblock(struct syscall_thread_data *data)
-{
-	if (!lkl_ops->sem_get)
-		return 0;
-
-	return !lkl_ops->sem_get(data->mutex);
-}
-
 static long __lkl_syscall(struct syscall_thread_data *data, long no,
 			  long *params)
 {
@@ -196,9 +188,6 @@ static long __lkl_syscall(struct syscall_thread_data *data, long no,
 	s.no = no;
 	s.params = params;
 
-	if (lkl_syscall_wouldblock(data))
-		lkl_puts("syscall would block");
-
 	lkl_ops->sem_down(data->mutex);
 	data->s = &s;
 	lkl_trigger_irq(data->irq);

tools/lkl/lib/posix-host.c

@@ -132,18 +132,6 @@ static void sem_down(struct lkl_sem *sem)
 #endif /* _POSIX_SEMAPHORES */
 }
 
-static int sem_get(struct lkl_sem *sem) {
-	int v = 0;
-#ifdef _POSIX_SEMAPHORES
-	WARN_UNLESS(sem_getvalue(&sem->sem, &v));
-#else
-	WARN_PTHREAD(pthread_mutex_lock(&sem->lock));
-	v = sem->count;
-	WARN_PTHREAD(pthread_mutex_unlock(&sem->lock));
-#endif /* _POSIX_SEMAPHORES */
-	return v;
-}
-
 static struct lkl_mutex *mutex_alloc(void)
 {
 	struct lkl_mutex *_mutex = malloc(sizeof(struct lkl_mutex));
@@ -301,7 +289,6 @@ struct lkl_host_operations lkl_host_ops = {
 	.sem_free = sem_free,
 	.sem_up = sem_up,
 	.sem_down = sem_down,
-	.sem_get = sem_get,
 	.mutex_alloc = mutex_alloc,
 	.mutex_free = mutex_free,
 	.mutex_lock = mutex_lock,