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Show First 20 Lines • Show All 782 Lines • ▼ Show 20 Lines	case F_READAHEAD:
if (error != 0)		if (error != 0)
break;		break;
if (fp->f_type != DTYPE_VNODE) {		if (fp->f_type != DTYPE_VNODE) {
fdrop(fp, td);		fdrop(fp, td);
error = EBADF;		error = EBADF;
break;		break;
}		}
vp = fp->f_vnode;		vp = fp->f_vnode;
		if (vp->v_type != VREG) {
		fdrop(fp, td);
		error = ENOTTY;
		break;
		}

/*		/*
* Exclusive lock synchronizes against f_seqcount reads and		* Exclusive lock synchronizes against f_seqcount reads and
* writes in sequential_heuristic().		* writes in sequential_heuristic().
*/		*/
error = vn_lock(vp, LK_EXCLUSIVE);		error = vn_lock(vp, LK_EXCLUSIVE);
if (error != 0) {		if (error != 0) {
fdrop(fp, td);		fdrop(fp, td);
break;		break;
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