kvm debugfs 接口

static int kvm_init_debug(void)
{
int r = -EEXIST;
struct kvm_stats_debugfs_item *p;

kvm_debugfs_dir = debugfs_create_dir("kvm", NULL);if (kvm_debugfs_dir == NULL)    goto out;kvm_debugfs_num_entries = 0;for (p = debugfs_entries; p->name; ++p, kvm_debugfs_num_entries++) {    if (!debugfs_create_file(p->name, 0444, kvm_debugfs_dir,                 (void *)(long)p->offset,                 stat_fops[p->kind]))        goto out_dir;}return 0;

out_dir:
debugfs_remove_recursive(kvm_debugfs_dir);
out:
return r;
}