| /* { dg-do compile { target i?86-*-* } } */ | |
| /* { dg-options -O2 } */ | |
| extern __inline__ int test_and_set_bit(int nr, volatile void * addr) | |
| { | |
| int oldbit; | |
| __asm__ __volatile__( "" | |
| "btsl %2,%1\n\tsbbl %0,%0" | |
| :"=r" (oldbit),"=m" (addr) | |
| :"ir" (nr)); | |
| return oldbit; | |
| } | |
| struct buffer_head { | |
| unsigned long b_state; | |
| }; | |
| extern void lock_buffer(struct buffer_head * bh) | |
| { | |
| while (test_and_set_bit(2 , &bh->b_state)) | |
| __wait_on_buffer(bh); | |
| } |