1 /* { dg-do compile } */
2 /* { dg-options -O2 } */
3 
test_and_set_bit(int nr,volatile void * addr)4 extern __inline__ int test_and_set_bit(int nr, volatile void * addr)
5 {
6 	int oldbit;
7 	__asm__ __volatile__( ""
8 		"btsl %2,%1\n\tsbbl %0,%0"
9 		:"=r" (oldbit),"=m" (addr)
10 		:"ir" (nr));
11 	return oldbit;
12 }
13 struct buffer_head {
14 	unsigned long b_state;
15 };
lock_buffer(struct buffer_head * bh)16 extern void lock_buffer(struct buffer_head * bh)
17 {
18 	while (test_and_set_bit(2 , &bh->b_state))
19 		__wait_on_buffer(bh);
20 }
21