vm_mmap.c (249645144d24e86f021b30c8637a8e900076f1c0) vm_mmap.c (2589f2499de03fe756d249d14d9024dc9faca817)
1/*
2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1991, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.

--- 285 unchanged lines hidden (view full) ---

294 flags |= MAP_NOSYNC;
295 vp = (struct vnode *) fp->f_data;
296 if (vp->v_type != VREG && vp->v_type != VCHR)
297 return (EINVAL);
298 /*
299 * XXX hack to handle use of /dev/zero to map anon memory (ala
300 * SunOS).
301 */
1/*
2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1991, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.

--- 285 unchanged lines hidden (view full) ---

294 flags |= MAP_NOSYNC;
295 vp = (struct vnode *) fp->f_data;
296 if (vp->v_type != VREG && vp->v_type != VCHR)
297 return (EINVAL);
298 /*
299 * XXX hack to handle use of /dev/zero to map anon memory (ala
300 * SunOS).
301 */
302 if (vp->v_type == VCHR && iszerodev(vp->v_rdev)) {
302 if ((vp->v_type == VCHR) &&
303 (vp->v_rdev->si_devsw->d_flags & D_MMAP_ANON)) {
303 handle = NULL;
304 maxprot = VM_PROT_ALL;
305 flags |= MAP_ANON;
306 pos = 0;
307 } else {
308 /*
309 * cdevs does not provide private mappings of any kind.
310 */

--- 852 unchanged lines hidden --- 		304 handle = NULL;
305 maxprot = VM_PROT_ALL;
306 flags |= MAP_ANON;
307 pos = 0;
308 } else {
309 /*
310 * cdevs does not provide private mappings of any kind.
311 */

--- 852 unchanged lines hidden ---