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/* { 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);
}
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