linux-master/fs/buffer.c

3006 struct bh_accounting {
3011 static DEFINE_PER_CPU(struct bh_accounting, bh_accounting) = {0, 0};
3018 	if (__this_cpu_inc_return(bh_accounting.ratelimit) - 1 < 4096)
3020 	__this_cpu_write(bh_accounting.ratelimit, 0);
3022 		tot += per_cpu(bh_accounting, i).nr;
3033 		__this_cpu_inc(bh_accounting.nr);
3046 	__this_cpu_dec(bh_accounting.nr);
3061 	this_cpu_add(bh_accounting.nr, per_cpu(bh_accounting, cpu).nr);
3062 	per_cpu(bh_accounting, cpu).nr = 0;