10376 uts: NULL pointer issues in genunix

Reviewed by: Andy Fiddaman <andy@omniosce.org>
Reviewed by: Andy Stormont <astormont@racktopsystems.com>
Reviewed by: John Levon <john.levon@joyent.com>
Approved by: Robert Mustacchi <rm@joyent.com>

34 files changed, 94 insertions, 105 deletions

diff --git a/usr/src/common/acl/acl_common.c b/usr/src/common/acl/acl_common.c
index c6fd162099..59c2e38b82 100644
--- a/usr/src/common/acl/acl_common.c
+++ b/usr/src/common/acl/acl_common.c
@@ -781,9 +781,9 @@ acevals_init(acevals_t *vals, uid_t key)
 static void
 ace_list_init(ace_list_t *al, int dfacl_flag)
 {
-	acevals_init(&al->user_obj, NULL);
-	acevals_init(&al->group_obj, NULL);
-	acevals_init(&al->other_obj, NULL);
+	acevals_init(&al->user_obj, 0);
+	acevals_init(&al->group_obj, 0);
+	acevals_init(&al->other_obj, 0);
 	al->numusers = 0;
 	al->numgroups = 0;
 	al->acl_mask = 0;
diff --git a/usr/src/uts/common/disp/class.c b/usr/src/uts/common/disp/class.c
index 46fbf711ba..237ecb0497 100644
--- a/usr/src/uts/common/disp/class.c
+++ b/usr/src/uts/common/disp/class.c
@@ -24,8 +24,6 @@
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/types.h>
 #include <sys/systm.h>
 #include <sys/cmn_err.h>
@@ -154,7 +152,7 @@ getcidbyname_locked(char *clname, id_t *cidp)
 
 	ASSERT(MUTEX_HELD(&class_lock));
 
-	if (*clname == NULL)
+	if (*clname == '\0')
 		return (EINVAL);
 
 	for (clp = &sclass[0]; clp < &sclass[nclass]; clp++) {
diff --git a/usr/src/uts/common/fs/dnlc.c b/usr/src/uts/common/fs/dnlc.c
index 0ec57ff7f7..81a5e65ae0 100644
--- a/usr/src/uts/common/fs/dnlc.c
+++ b/usr/src/uts/common/fs/dnlc.c
@@ -954,7 +954,7 @@ dnlc_reduce_cache(void *reduce_percent)
 	if (dnlc_reduce_idle && (dnlc_nentries >= ncsize || reduce_percent)) {
 		dnlc_reduce_idle = 0;
 		if ((taskq_dispatch(system_taskq, do_dnlc_reduce_cache,
-		    reduce_percent, TQ_NOSLEEP)) == NULL)
+		    reduce_percent, TQ_NOSLEEP)) == (uintptr_t)NULL)
 			dnlc_reduce_idle = 1;
 	}
 }
diff --git a/usr/src/uts/common/fs/swapfs/swap_vnops.c b/usr/src/uts/common/fs/swapfs/swap_vnops.c
index 07d303afbb..b6c8c2cfe7 100644
--- a/usr/src/uts/common/fs/swapfs/swap_vnops.c
+++ b/usr/src/uts/common/fs/swapfs/swap_vnops.c
@@ -246,7 +246,7 @@ again:
 						swap_phys_free(pvp, poff,
 						    PAGESIZE);
 						ap->an_pvp = NULL;
-						ap->an_poff = NULL;
+						ap->an_poff = 0;
 						hat_setmod(pp);
 					}
 
@@ -423,7 +423,7 @@ swap_getconpage(
 
 				swap_phys_free(pvp, poff, PAGESIZE);
 				ap->an_pvp = NULL;
-				ap->an_poff = NULL;
+				ap->an_poff = 0;
 				hat_setmod(pp);
 				mutex_exit(ahm);
 			}
diff --git a/usr/src/uts/common/fs/vnode.c b/usr/src/uts/common/fs/vnode.c
index 0718e17f50..fc684d7900 100644
--- a/usr/src/uts/common/fs/vnode.c
+++ b/usr/src/uts/common/fs/vnode.c
@@ -915,7 +915,7 @@ vn_rele_async(vnode_t *vp, taskq_t *taskq)
 	if (vp->v_count == 1) {
 		mutex_exit(&vp->v_lock);
 		VERIFY(taskq_dispatch(taskq, (task_func_t *)vn_rele_inactive,
-		    vp, TQ_SLEEP) != NULL);
+		    vp, TQ_SLEEP) != (uintptr_t)NULL);
 		return;
 	}
 	VN_RELE_LOCKED(vp);
diff --git a/usr/src/uts/common/inet/ip/inet_ntop.c b/usr/src/uts/common/inet/ip/inet_ntop.c
index efad4fc176..c6876cc030 100644
--- a/usr/src/uts/common/inet/ip/inet_ntop.c
+++ b/usr/src/uts/common/inet/ip/inet_ntop.c
@@ -285,7 +285,7 @@ __inet_pton(int af, char *inp, void *outp, int compat)
 			in6_addr_t v6addr_u;
 		} v6buf, *v6outp;
 		uint16_t	*dbl_col = NULL;
-		char lastbyte = NULL;
+		char lastbyte = '\0';
 
 		v6outp = (union v6buf_u *)outp;
 
@@ -333,7 +333,7 @@ __inet_pton(int af, char *inp, void *outp, int compat)
 			} else {
 				v6buf.v6words_u[i] = htons((uint16_t)byte);
 			}
-			if (*end == NULL || i == 7) {
+			if (*end == '\0' || i == 7) {
 				inp = end;
 				break;
 			}
@@ -349,7 +349,7 @@ __inet_pton(int af, char *inp, void *outp, int compat)
 					dbl_col = &v6buf.v6words_u[i];
 					if (i == 0)
 						inp++;
-				} else if (*inp == NULL || *inp == ' ' ||
+				} else if (*inp == '\0' || *inp == ' ' ||
 				    *inp == '\t') {
 					break;
 				} else {
@@ -362,12 +362,12 @@ __inet_pton(int af, char *inp, void *outp, int compat)
 				return (0);
 			}
 			inp++;
-			if (*inp == NULL || *inp == ' ' || *inp == '\t') {
+			if (*inp == '\0' || *inp == ' ' || *inp == '\t') {
 				break;
 			}
 			lastbyte = *inp;
 		}
-		if (*inp != NULL && *inp != ' ' && *inp != '\t') {
+		if (*inp != '\0' && *inp != ' ' && *inp != '\t') {
 			return (0);
 		}
 		/*
diff --git a/usr/src/uts/common/io/pci_intr_lib.c b/usr/src/uts/common/io/pci_intr_lib.c
index ec385e0583..b5a4ffd3ef 100644
--- a/usr/src/uts/common/io/pci_intr_lib.c
+++ b/usr/src/uts/common/io/pci_intr_lib.c
@@ -118,7 +118,7 @@ pci_get_msi_ctrl(dev_info_t *dip, int type, ushort_t *msi_ctrl,
 
 	if ((PCI_CAP_LOCATE(*h, PCI_CAP_ID_MSI, caps_ptr) == DDI_SUCCESS) &&
 	    (type == DDI_INTR_TYPE_MSI)) {
-		if ((*msi_ctrl = PCI_CAP_GET16(*h, NULL, *caps_ptr,
+		if ((*msi_ctrl = PCI_CAP_GET16(*h, 0, *caps_ptr,
 		    PCI_MSI_CTRL)) == PCI_CAP_EINVAL16)
 			goto done;
 
@@ -130,7 +130,7 @@ pci_get_msi_ctrl(dev_info_t *dip, int type, ushort_t *msi_ctrl,
 
 	if ((PCI_CAP_LOCATE(*h, PCI_CAP_ID_MSI_X, caps_ptr) == DDI_SUCCESS) &&
 	    (type == DDI_INTR_TYPE_MSIX)) {
-		if ((*msi_ctrl = PCI_CAP_GET16(*h, NULL, *caps_ptr,
+		if ((*msi_ctrl = PCI_CAP_GET16(*h, 0, *caps_ptr,
 		    PCI_MSIX_CTRL)) == PCI_CAP_EINVAL16)
 			goto done;
 
@@ -214,37 +214,35 @@ pci_msi_configure(dev_info_t *rdip, int type, int count, int inum,
 	if (type == DDI_INTR_TYPE_MSI) {
 		/* Set the bits to inform how many MSIs are enabled */
 		msi_ctrl |= ((highbit(count) -1) << PCI_MSI_MME_SHIFT);
-		PCI_CAP_PUT16(h, NULL, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
+		PCI_CAP_PUT16(h, 0, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
 
 		DDI_INTR_NEXDBG((CE_CONT, "pci_msi_configure: msi_ctrl = %x\n",
-		    PCI_CAP_GET16(h, NULL, caps_ptr, PCI_MSI_CTRL)));
+		    PCI_CAP_GET16(h, 0, caps_ptr, PCI_MSI_CTRL)));
 
 		/* Set the "data" and "addr" bits */
-		PCI_CAP_PUT32(h, NULL, caps_ptr, PCI_MSI_ADDR_OFFSET, addr);
+		PCI_CAP_PUT32(h, 0, caps_ptr, PCI_MSI_ADDR_OFFSET, addr);
 
 		DDI_INTR_NEXDBG((CE_CONT, "pci_msi_configure: msi_addr = %x\n",
-		    PCI_CAP_GET32(h, NULL, caps_ptr, PCI_MSI_ADDR_OFFSET)));
+		    PCI_CAP_GET32(h, 0, caps_ptr, PCI_MSI_ADDR_OFFSET)));
 
 		if (msi_ctrl &  PCI_MSI_64BIT_MASK) {
-			PCI_CAP_PUT32(h, NULL, caps_ptr, PCI_MSI_ADDR_OFFSET
+			PCI_CAP_PUT32(h, 0, caps_ptr, PCI_MSI_ADDR_OFFSET
 			    + 4, addr >> 32);
 
 			DDI_INTR_NEXDBG((CE_CONT, "pci_msi_configure: upper "
-			    "32bit msi_addr = %x\n", PCI_CAP_GET32(h, NULL,
+			    "32bit msi_addr = %x\n", PCI_CAP_GET32(h, 0,
 			    caps_ptr, PCI_MSI_ADDR_OFFSET + 4)));
 
-			PCI_CAP_PUT16(h, NULL, caps_ptr, PCI_MSI_64BIT_DATA,
-			    data);
+			PCI_CAP_PUT16(h, 0, caps_ptr, PCI_MSI_64BIT_DATA, data);
 
 			DDI_INTR_NEXDBG((CE_CONT, "pci_msi_configure: msi_data "
-			    "= %x\n", PCI_CAP_GET16(h, NULL, caps_ptr,
+			    "= %x\n", PCI_CAP_GET16(h, 0, caps_ptr,
 			    PCI_MSI_64BIT_DATA)));
 		} else {
-			PCI_CAP_PUT16(h, NULL, caps_ptr, PCI_MSI_32BIT_DATA,
-			    data);
+			PCI_CAP_PUT16(h, 0, caps_ptr, PCI_MSI_32BIT_DATA, data);
 
 			DDI_INTR_NEXDBG((CE_CONT, "pci_msi_configure: msi_data "
-			    "= %x\n", PCI_CAP_GET16(h, NULL, caps_ptr,
+			    "= %x\n", PCI_CAP_GET16(h, 0, caps_ptr,
 			    PCI_MSI_32BIT_DATA)));
 		}
 	} else if (type == DDI_INTR_TYPE_MSIX) {
@@ -307,22 +305,20 @@ pci_msi_unconfigure(dev_info_t *rdip, int type, int inum)
 
 	if (type == DDI_INTR_TYPE_MSI) {
 		msi_ctrl &= (~PCI_MSI_MME_MASK);
-		PCI_CAP_PUT16(h, NULL, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
+		PCI_CAP_PUT16(h, 0, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
 
-		PCI_CAP_PUT32(h, NULL, caps_ptr, PCI_MSI_ADDR_OFFSET, 0);
+		PCI_CAP_PUT32(h, 0, caps_ptr, PCI_MSI_ADDR_OFFSET, 0);
 
 		if (msi_ctrl &  PCI_MSI_64BIT_MASK) {
-			PCI_CAP_PUT16(h, NULL, caps_ptr, PCI_MSI_64BIT_DATA,
-			    0);
-			PCI_CAP_PUT32(h, NULL, caps_ptr, PCI_MSI_ADDR_OFFSET
+			PCI_CAP_PUT16(h, 0, caps_ptr, PCI_MSI_64BIT_DATA, 0);
+			PCI_CAP_PUT32(h, 0, caps_ptr, PCI_MSI_ADDR_OFFSET
 			    + 4, 0);
 		} else {
-			PCI_CAP_PUT16(h, NULL, caps_ptr, PCI_MSI_32BIT_DATA,
-			    0);
+			PCI_CAP_PUT16(h, 0, caps_ptr, PCI_MSI_32BIT_DATA, 0);
 		}
 
 		DDI_INTR_NEXDBG((CE_CONT, "pci_msi_unconfigure: msi_ctrl "
-		    "= %x\n", PCI_CAP_GET16(h, NULL, caps_ptr, PCI_MSI_CTRL)));
+		    "= %x\n", PCI_CAP_GET16(h, 0, caps_ptr, PCI_MSI_CTRL)));
 
 	} else if (type == DDI_INTR_TYPE_MSIX) {
 		uintptr_t	off;
@@ -411,14 +407,14 @@ pci_msi_enable_mode(dev_info_t *rdip, int type)
 			goto finished;
 
 		msi_ctrl |= PCI_MSI_ENABLE_BIT;
-		PCI_CAP_PUT16(cfg_hdle, NULL, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
+		PCI_CAP_PUT16(cfg_hdle, 0, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
 
 	} else if (type == DDI_INTR_TYPE_MSIX) {
 		if (msi_ctrl & PCI_MSIX_ENABLE_BIT)
 			goto finished;
 
 		msi_ctrl |= PCI_MSIX_ENABLE_BIT;
-		PCI_CAP_PUT16(cfg_hdle, NULL, caps_ptr, PCI_MSIX_CTRL,
+		PCI_CAP_PUT16(cfg_hdle, 0, caps_ptr, PCI_MSIX_CTRL,
 		    msi_ctrl);
 	}
 
@@ -459,14 +455,13 @@ pci_msi_disable_mode(dev_info_t *rdip, int type)
 		if (!(msi_ctrl & PCI_MSI_ENABLE_BIT))
 			goto finished;
 		msi_ctrl &= ~PCI_MSI_ENABLE_BIT;
-		PCI_CAP_PUT16(cfg_hdle, NULL, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
+		PCI_CAP_PUT16(cfg_hdle, 0, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
 	} else if (type == DDI_INTR_TYPE_MSIX) {
 		if (!(msi_ctrl & PCI_MSIX_ENABLE_BIT))
 			goto finished;
 
 		msi_ctrl &= ~PCI_MSIX_ENABLE_BIT;
-		PCI_CAP_PUT16(cfg_hdle, NULL, caps_ptr, PCI_MSIX_CTRL,
-		    msi_ctrl);
+		PCI_CAP_PUT16(cfg_hdle, 0, caps_ptr, PCI_MSIX_CTRL, msi_ctrl);
 	}
 
 finished:
@@ -507,13 +502,13 @@ pci_msi_set_mask(dev_info_t *rdip, int type, int inum)
 		offset = (msi_ctrl &  PCI_MSI_64BIT_MASK) ?
 		    PCI_MSI_64BIT_MASKBITS : PCI_MSI_32BIT_MASK;
 
-		if ((mask_bits = PCI_CAP_GET32(cfg_hdle, NULL, caps_ptr,
+		if ((mask_bits = PCI_CAP_GET32(cfg_hdle, 0, caps_ptr,
 		    offset)) == PCI_CAP_EINVAL32)
 			goto done;
 
 		mask_bits |= (1 << inum);
 
-		PCI_CAP_PUT32(cfg_hdle, NULL, caps_ptr, offset, mask_bits);
+		PCI_CAP_PUT32(cfg_hdle, 0, caps_ptr, offset, mask_bits);
 
 	} else if (type == DDI_INTR_TYPE_MSIX) {
 		uintptr_t		off;
@@ -570,13 +565,13 @@ pci_msi_clr_mask(dev_info_t *rdip, int type, int inum)
 
 		offset = (msi_ctrl &  PCI_MSI_64BIT_MASK) ?
 		    PCI_MSI_64BIT_MASKBITS : PCI_MSI_32BIT_MASK;
-		if ((mask_bits = PCI_CAP_GET32(cfg_hdle, NULL, caps_ptr,
+		if ((mask_bits = PCI_CAP_GET32(cfg_hdle, 0, caps_ptr,
 		    offset)) == PCI_CAP_EINVAL32)
 			goto done;
 
 		mask_bits &= ~(1 << inum);
 
-		PCI_CAP_PUT32(cfg_hdle, NULL, caps_ptr, offset, mask_bits);
+		PCI_CAP_PUT32(cfg_hdle, 0, caps_ptr, offset, mask_bits);
 
 	} else if (type == DDI_INTR_TYPE_MSIX) {
 		uintptr_t		off;
@@ -637,7 +632,7 @@ pci_msi_get_pending(dev_info_t *rdip, int type, int inum, int *pendingp)
 		offset = (msi_ctrl &  PCI_MSI_64BIT_MASK) ?
 		    PCI_MSI_64BIT_PENDING : PCI_MSI_32BIT_PENDING;
 
-		if ((pending_bits = PCI_CAP_GET32(cfg_hdle, NULL, caps_ptr,
+		if ((pending_bits = PCI_CAP_GET32(cfg_hdle, 0, caps_ptr,
 		    offset)) == PCI_CAP_EINVAL32)
 			goto done;
 
@@ -727,7 +722,7 @@ pci_msi_set_nintrs(dev_info_t *rdip, int type, int navail)
 	if (type == DDI_INTR_TYPE_MSI) {
 		msi_ctrl |= ((highbit(navail) -1) << PCI_MSI_MME_SHIFT);
 
-		PCI_CAP_PUT16(cfg_hdle, NULL, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
+		PCI_CAP_PUT16(cfg_hdle, 0, caps_ptr, PCI_MSI_CTRL, msi_ctrl);
 	} else if (type == DDI_INTR_TYPE_MSIX) {
 		DDI_INTR_NEXDBG((CE_CONT, "pci_msi_set_nintrs: unsupported\n"));
 	}
@@ -809,7 +804,7 @@ pci_msix_init(dev_info_t *rdip)
 	msix_p->msix_dev_attr.devacc_attr_dataorder = DDI_STRICTORDER_ACC;
 
 	/* Map the entire MSI-X vector table */
-	msix_p->msix_tbl_offset = PCI_CAP_GET32(cfg_hdle, NULL, caps_ptr,
+	msix_p->msix_tbl_offset = PCI_CAP_GET32(cfg_hdle, 0, caps_ptr,
 	    PCI_MSIX_TBL_OFFSET);
 
 	if ((breg = pci_msix_bir_index[msix_p->msix_tbl_offset &
@@ -870,7 +865,7 @@ pci_msix_init(dev_info_t *rdip)
 	/*
 	 * Map in the MSI-X Pending Bit Array
 	 */
-	msix_p->msix_pba_offset = PCI_CAP_GET32(cfg_hdle, NULL, caps_ptr,
+	msix_p->msix_pba_offset = PCI_CAP_GET32(cfg_hdle, 0, caps_ptr,
 	    PCI_MSIX_PBA_OFFSET);
 
 	if ((breg = pci_msix_bir_index[msix_p->msix_pba_offset &
diff --git a/usr/src/uts/common/io/ptms_conf.c b/usr/src/uts/common/io/ptms_conf.c
index 16ead0e9b6..f593f5313f 100644
--- a/usr/src/uts/common/io/ptms_conf.c
+++ b/usr/src/uts/common/io/ptms_conf.c
@@ -23,8 +23,6 @@
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /*
  * This file contains global data and code shared between master and slave parts
  * of the pseudo-terminal driver.
@@ -608,8 +606,8 @@ ptms_constructor(void *maddr, void *arg, int kmflags)
 	pt->pts_rdq = NULL;
 	pt->ptm_rdq = NULL;
 	pt->pt_nullmsg = NULL;
-	pt->pt_pid = NULL;
-	pt->pt_minor = NULL;
+	pt->pt_pid = 0;
+	pt->pt_minor = 0;
 	pt->pt_refcnt = 0;
 	pt->pt_state = 0;
 	pt->pt_zoneid = GLOBAL_ZONEID;
diff --git a/usr/src/uts/common/io/stream.c b/usr/src/uts/common/io/stream.c
index e9af19ca18..ec76c6e2b9 100644
--- a/usr/src/uts/common/io/stream.c
+++ b/usr/src/uts/common/io/stream.c
@@ -2089,7 +2089,7 @@ dup_failed:
 	if (freezer != curthread)
 		mutex_exit(QLOCK(q));
 
-	STR_FTEVENT_MSG(bp, q, FTEV_GETQ, NULL);
+	STR_FTEVENT_MSG(bp, q, FTEV_GETQ, 0);
 
 	return (bp);
 }
@@ -2286,7 +2286,7 @@ rmvq_noenab(queue_t *q, mblk_t *mp)
 	if (freezer != curthread)
 		mutex_exit(QLOCK(q));
 
-	STR_FTEVENT_MSG(mp, q, FTEV_RMVQ, NULL);
+	STR_FTEVENT_MSG(mp, q, FTEV_RMVQ, 0);
 }
 
 /*
@@ -2334,7 +2334,7 @@ flushq_common(queue_t *q, int flag, int pcproto_flag)
 		nmp = mp->b_next;
 		mp->b_next = mp->b_prev = NULL;
 
-		STR_FTEVENT_MBLK(mp, q, FTEV_FLUSHQ, NULL);
+		STR_FTEVENT_MBLK(mp, q, FTEV_FLUSHQ, 0);
 
 		if (pcproto_flag && (mp->b_datap->db_type == M_PCPROTO))
 			(void) putq(q, mp);
@@ -2773,7 +2773,7 @@ putq(queue_t *q, mblk_t *bp)
 		}
 	}
 
-	STR_FTEVENT_MSG(bp, q, FTEV_PUTQ, NULL);
+	STR_FTEVENT_MSG(bp, q, FTEV_PUTQ, 0);
 
 	if ((mcls > QNORM) ||
 	    (canenable(q) && (q->q_flag & QWANTR || bp->b_band)))
@@ -2955,7 +2955,7 @@ putbq(queue_t *q, mblk_t *bp)
 		}
 	}
 
-	STR_FTEVENT_MSG(bp, q, FTEV_PUTBQ, NULL);
+	STR_FTEVENT_MSG(bp, q, FTEV_PUTBQ, 0);
 
 	if ((mcls > QNORM) || (canenable(q) && (q->q_flag & QWANTR)))
 		qenable_locked(q);
@@ -3095,7 +3095,7 @@ badord:
 		}
 	}
 
-	STR_FTEVENT_MSG(mp, q, FTEV_INSQ, NULL);
+	STR_FTEVENT_MSG(mp, q, FTEV_INSQ, 0);
 
 	if (canenable(q) && (q->q_flag & QWANTR))
 		qenable_locked(q);
diff --git a/usr/src/uts/common/ipp/ippconf.c b/usr/src/uts/common/ipp/ippconf.c
index 851a0ecca0..75e880dc83 100644
--- a/usr/src/uts/common/ipp/ippconf.c
+++ b/usr/src/uts/common/ipp/ippconf.c
@@ -3231,7 +3231,7 @@ hash(
 	 * Make a hash value by XORing all the ascii codes in the text string.
 	 */
 
-	for (ptr = (char *)name; *ptr != NULL; ptr++) {
+	for (ptr = (char *)name; *ptr != '\0'; ptr++) {
 		val ^= *ptr;
 	}
 
diff --git a/usr/src/uts/common/os/dacf.c b/usr/src/uts/common/os/dacf.c
index 1ab2afa986..8d4cd486d8 100644
--- a/usr/src/uts/common/os/dacf.c
+++ b/usr/src/uts/common/os/dacf.c
@@ -23,8 +23,6 @@
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /*
  * DACF: device autoconfiguration support
  *
@@ -141,7 +139,7 @@ static dacf_ds_t dacf_devspecs[] = {
 	{ "minor-nodetype", 	DACF_DS_MIN_NT 		},
 	{ "driver-minorname", 	DACF_DS_DRV_MNAME	},
 	{ "device-path",	DACF_DS_DEV_PATH	},
-	{ NULL,			NULL			},
+	{ NULL,			DACF_DS_ERROR		},
 };
 
 mod_hash_t *posta_mntype, *posta_mname, *posta_devname;	/* post-attach */
diff --git a/usr/src/uts/common/os/damap.c b/usr/src/uts/common/os/damap.c
index f90c5569c4..dc219318c6 100644
--- a/usr/src/uts/common/os/damap.c
+++ b/usr/src/uts/common/os/damap.c
@@ -1546,7 +1546,7 @@ dam_addrset_stable_cb(void *arg)
 	 */
 	if ((mapp->dam_flags & DAM_SPEND) ||
 	    (taskq_dispatch(system_taskq, dam_stabilize_map, mapp,
-	    TQ_NOSLEEP | TQ_NOQUEUE) == NULL)) {
+	    TQ_NOSLEEP | TQ_NOQUEUE) == (uintptr_t)NULL)) {
 		DAM_INCR_STAT(mapp, dam_overrun);
 		mapp->dam_stable_overrun++;
 		dam_sched_timeout(dam_addrset_stable_cb, mapp,
diff --git a/usr/src/uts/common/os/dumpsubr.c b/usr/src/uts/common/os/dumpsubr.c
index a30f4841d7..0eb96464bf 100644
--- a/usr/src/uts/common/os/dumpsubr.c
+++ b/usr/src/uts/common/os/dumpsubr.c
@@ -1255,7 +1255,7 @@ dumpinit(vnode_t *vp, char *name, int justchecking)
 				if (IS_SWAPVP(common_specvp(cvp)))
 					error = EBUSY;
 				else if ((error = VOP_IOCTL(cdev_vp,
-				    DKIOCDUMPINIT, NULL, FKIOCTL, kcred,
+				    DKIOCDUMPINIT, 0, FKIOCTL, kcred,
 				    NULL, NULL)) != 0)
 					dumpfini();
 			}
@@ -1300,7 +1300,7 @@ dumpfini(void)
 	if (is_zfs &&
 	    (cdev_vp = makespecvp(VTOS(dumpvp)->s_dev, VCHR)) != NULL) {
 		if (VOP_OPEN(&cdev_vp, FREAD | FWRITE, kcred, NULL) == 0) {
-			(void) VOP_IOCTL(cdev_vp, DKIOCDUMPFINI, NULL, FKIOCTL,
+			(void) VOP_IOCTL(cdev_vp, DKIOCDUMPFINI, 0, FKIOCTL,
 			    kcred, NULL, NULL);
 			(void) VOP_CLOSE(cdev_vp, FREAD | FWRITE, 1, 0,
 			    kcred, NULL);
@@ -2888,7 +2888,7 @@ dumpsys(void)
 		}
 		++dumpcfg.nhelper_used;
 		hp->helper = FREEHELPER;
-		hp->taskqid = NULL;
+		hp->taskqid = 0;
 		hp->ds = ds;
 		bzero(&hp->perpage, sizeof (hp->perpage));
 		if (dumpcfg.clevel >= DUMP_CLEVEL_BZIP2)
diff --git a/usr/src/uts/common/os/evchannels.c b/usr/src/uts/common/os/evchannels.c
index f2ca732594..cef23555f6 100644
--- a/usr/src/uts/common/os/evchannels.c
+++ b/usr/src/uts/common/os/evchannels.c
@@ -563,7 +563,7 @@ evch_evq_destroy(evch_eventq_t *eqp)
 
 	ASSERT(evch_dl_getnum(&eqp->eq_subscr) == 0);
 	/* Kill delivery thread */
-	if (eqp->eq_thrid != NULL) {
+	if (eqp->eq_thrid != 0) {
 		mutex_enter(&eqp->eq_queuemx);
 		eqp->eq_tabortflag = 1;
 		eqp->eq_holdmode = 0;
diff --git a/usr/src/uts/common/os/exec.c b/usr/src/uts/common/os/exec.c
index 53c552f135..f51e2c5ca1 100644
--- a/usr/src/uts/common/os/exec.c
+++ b/usr/src/uts/common/os/exec.c
@@ -356,7 +356,7 @@ exec_common(const char *fname, const char **argp, const char **envp,
 	 */
 	up->u_acflag &= ~AFORK;
 	bcopy(exec_file, up->u_comm, MAXCOMLEN+1);
-	curthread->t_predcache = NULL;
+	curthread->t_predcache = 0;
 
 	/*
 	 * Clear contract template state
@@ -1664,7 +1664,7 @@ stk_copyin(execa_t *uap, uarg_t *args, intpdata_t *intp, void **auxvpp)
 			if (args->scrubenv && strncmp(tmp, "LD_", 3) == 0) {
 				/* Undo the copied string */
 				args->stk_strp = tmp;
-				*(args->stk_offp++) = NULL;
+				*(args->stk_offp++) = 0;
 			}
 			envp += ptrsize;
 		}
diff --git a/usr/src/uts/common/os/main.c b/usr/src/uts/common/os/main.c
index ec61ad5c76..7bc41b6954 100644
--- a/usr/src/uts/common/os/main.c
+++ b/usr/src/uts/common/os/main.c
@@ -277,7 +277,7 @@ exec_init(const char *initpath, const char *args)
 	lwp->lwp_ap = lwp->lwp_arg;
 	lwp->lwp_arg[0] = exec_fnamep;
 	lwp->lwp_arg[1] = uap;
-	lwp->lwp_arg[2] = NULL;
+	lwp->lwp_arg[2] = 0;
 	curthread->t_post_sys = 1;
 	curthread->t_sysnum = SYS_execve;
 
diff --git a/usr/src/uts/common/os/modctl.c b/usr/src/uts/common/os/modctl.c
index a6392a5273..e2a3335eb4 100644
--- a/usr/src/uts/common/os/modctl.c
+++ b/usr/src/uts/common/os/modctl.c
@@ -2300,17 +2300,17 @@ modctl_hp(int subcmd, const char *path, char *cn_name, uintptr_t arg,
 	switch (subcmd) {
 	case MODHPOPS_CHANGE_STATE:
 		error = ddihp_modctl(DDI_HPOP_CN_CHANGE_STATE, devpath,
-		    cn_name_str, arg, NULL);
+		    cn_name_str, arg, 0);
 		break;
 	case MODHPOPS_CREATE_PORT:
 		/* Create an empty PORT */
 		error = ddihp_modctl(DDI_HPOP_CN_CREATE_PORT, devpath,
-		    cn_name_str, NULL, NULL);
+		    cn_name_str, 0, 0);
 		break;
 	case MODHPOPS_REMOVE_PORT:
 		/* Remove an empty PORT */
 		error = ddihp_modctl(DDI_HPOP_CN_REMOVE_PORT, devpath,
-		    cn_name_str, NULL, NULL);
+		    cn_name_str, 0, 0);
 		break;
 	case MODHPOPS_BUS_GET:
 		error = ddihp_modctl(DDI_HPOP_CN_GET_PROPERTY, devpath,
diff --git a/usr/src/uts/common/os/modsysfile.c b/usr/src/uts/common/os/modsysfile.c
index 7d8580c334..3605104ae7 100644
--- a/usr/src/uts/common/os/modsysfile.c
+++ b/usr/src/uts/common/os/modsysfile.c
@@ -1201,7 +1201,7 @@ sys_set_var(int fcn, struct sysparam *sysp, void *p)
 	} else
 		return;
 
-	if (symaddr != NULL) {
+	if (symaddr != (uintptr_t)NULL) {
 		switch (size) {
 		case 1:
 			set_int8_var(symaddr, sysp);
diff --git a/usr/src/uts/common/os/pcifm.c b/usr/src/uts/common/os/pcifm.c
index a95686fc54..863b3a5105 100644
--- a/usr/src/uts/common/os/pcifm.c
+++ b/usr/src/uts/common/os/pcifm.c
@@ -49,7 +49,7 @@ pci_fm_err_t pci_err_tbl[] = {
 	PCI_MA,		PCI_STAT_R_MAST_AB,	PCI_TARG_MA,	DDI_FM_UNKNOWN,
 	PCI_REC_TA,	PCI_STAT_R_TARG_AB,	PCI_TARG_REC_TA, DDI_FM_UNKNOWN,
 	PCI_SIG_TA,	PCI_STAT_S_TARG_AB,	NULL,		DDI_FM_UNKNOWN,
-	NULL, NULL, NULL, NULL,
+	NULL, 0, NULL, DDI_FM_OK,
 };
 
 pci_fm_err_t pci_bdg_err_tbl[] = {
@@ -61,14 +61,14 @@ pci_fm_err_t pci_bdg_err_tbl[] = {
 #endif
 	PCI_REC_TA,	PCI_STAT_R_TARG_AB,	PCI_TARG_REC_TA, DDI_FM_UNKNOWN,
 	PCI_SIG_TA,	PCI_STAT_S_TARG_AB,	NULL,		DDI_FM_UNKNOWN,
-	NULL, NULL, NULL, NULL,
+	NULL, 0, NULL, DDI_FM_OK,
 };
 
 static pci_fm_err_t pcix_err_tbl[] = {
 	PCIX_SPL_DIS,		PCI_PCIX_SPL_DSCD,	NULL,	DDI_FM_UNKNOWN,
 	PCIX_UNEX_SPL,		PCI_PCIX_UNEX_SPL,	NULL,	DDI_FM_UNKNOWN,
 	PCIX_RX_SPL_MSG,	PCI_PCIX_RX_SPL_MSG,	NULL,   DDI_FM_UNKNOWN,
-	NULL, NULL, NULL, NULL,
+	NULL, 0, NULL, DDI_FM_OK,
 };
 
 static pci_fm_err_t pcix_sec_err_tbl[] = {
@@ -76,7 +76,7 @@ static pci_fm_err_t pcix_sec_err_tbl[] = {
 	PCIX_UNEX_SPL,		PCI_PCIX_BSS_UNEX_SPL,	NULL,	DDI_FM_UNKNOWN,
 	PCIX_BSS_SPL_OR,	PCI_PCIX_BSS_SPL_OR,	NULL,	DDI_FM_OK,
 	PCIX_BSS_SPL_DLY,	PCI_PCIX_BSS_SPL_DLY,	NULL,	DDI_FM_OK,
-	NULL, NULL, NULL, NULL,
+	NULL, 0, NULL, DDI_FM_OK,
 };
 
 static int
@@ -1113,7 +1113,7 @@ pci_ereport_post(dev_info_t *dip, ddi_fm_error_t *derr, uint16_t *xx_status)
 
 	ASSERT(fmhdl);
 
-	if (de.fme_ena == NULL)
+	if (de.fme_ena == 0)
 		de.fme_ena = fm_ena_generate(0, FM_ENA_FMT1);
 
 	erpt_p = (pci_erpt_t *)fmhdl->fh_bus_specific;
diff --git a/usr/src/uts/common/os/policy.c b/usr/src/uts/common/os/policy.c
index d6821c83b0..d3d362a8a7 100644
--- a/usr/src/uts/common/os/policy.c
+++ b/usr/src/uts/common/os/policy.c
@@ -2070,7 +2070,7 @@ secpolicy_rpcmod_open(const cred_t *cr)
 	if (PRIV_POLICY_ONLY(cr, PRIV_SYS_NFS, B_FALSE))
 		return (secpolicy_nfs(cr));
 	else
-		return (secpolicy_net_config(cr, NULL));
+		return (secpolicy_net_config(cr, B_FALSE));
 }
 
 int
diff --git a/usr/src/uts/common/os/pool.c b/usr/src/uts/common/os/pool.c
index c79c7dad51..6d183cd71c 100644
--- a/usr/src/uts/common/os/pool.c
+++ b/usr/src/uts/common/os/pool.c
@@ -566,14 +566,14 @@ pool_status(int status)
 		if (ret != 0)
 			return (ret);
 		pool_state = POOL_ENABLED;
-		pool_event_dispatch(POOL_E_ENABLE, NULL);
+		pool_event_dispatch(POOL_E_ENABLE, 0);
 		break;
 	case POOL_DISABLED:
 		ret = pool_disable();
 		if (ret != 0)
 			return (ret);
 		pool_state = POOL_DISABLED;
-		pool_event_dispatch(POOL_E_DISABLE, NULL);
+		pool_event_dispatch(POOL_E_DISABLE, 0);
 		break;
 	default:
 		ret = EINVAL;
diff --git a/usr/src/uts/common/os/streamio.c b/usr/src/uts/common/os/streamio.c
index 1786769cfb..d4c2f7023d 100644
--- a/usr/src/uts/common/os/streamio.c
+++ b/usr/src/uts/common/os/streamio.c
@@ -5469,7 +5469,7 @@ strioctl(struct vnode *vp, int cmd, intptr_t arg, int flag, int copyflag,
 		struct str_mlist *mlist;
 		STRUCT_DECL(str_list, strlist);
 
-		if (arg == NULL) { /* Return number of modules plus driver */
+		if (arg == 0) { /* Return number of modules plus driver */
 			if (stp->sd_vnode->v_type == VFIFO)
 				*rvalp = stp->sd_pushcnt;
 			else
diff --git a/usr/src/uts/common/os/strsubr.c b/usr/src/uts/common/os/strsubr.c
index 99d94cccf8..c19f7cefb7 100644
--- a/usr/src/uts/common/os/strsubr.c
+++ b/usr/src/uts/common/os/strsubr.c
@@ -4034,7 +4034,7 @@ esballoc_enqueue_mblk(mblk_t *mp)
 {
 
 	if (taskq_dispatch(system_taskq, (task_func_t *)esballoc_mblk_free, mp,
-	    TQ_NOSLEEP) == NULL) {
+	    TQ_NOSLEEP) == (uintptr_t)NULL) {
 		mblk_t *first_mp = mp;
 		/*
 		 * System is low on resources and can't perform a non-sleeping
diff --git a/usr/src/uts/common/os/sunpci.c b/usr/src/uts/common/os/sunpci.c
index b26685d941..0dd4f4c206 100644
--- a/usr/src/uts/common/os/sunpci.c
+++ b/usr/src/uts/common/os/sunpci.c
@@ -357,7 +357,7 @@ static pci_cap_entry_t pci_cap_table[] = {
 	 * {PCI_CAP_ID_AGP_8X, 0, NULL},
 	 * {PCI_CAP_ID_SECURE_DEV, 0, NULL},
 	 */
-	{PCI_CAP_NEXT_PTR_NULL, 0, NULL}
+	{PCI_CAP_NEXT_PTR_NULL, 0, 0}
 };
 
 
diff --git a/usr/src/uts/common/os/task.c b/usr/src/uts/common/os/task.c
index bafcfd45e0..91325429a3 100644
--- a/usr/src/uts/common/os/task.c
+++ b/usr/src/uts/common/os/task.c
@@ -456,7 +456,7 @@ task_rele(task_t *tk)
 	 * the task fails.
 	 */
 	if (taskq_dispatch(exacct_queue, exacct_commit_task, tk,
-	    TQ_NOSLEEP | TQ_NOQUEUE) == NULL) {
+	    TQ_NOSLEEP | TQ_NOQUEUE) == (uintptr_t)NULL) {
 		mutex_enter(&task_commit_lock);
 		if (task_commit_head == NULL) {
 			task_commit_head = task_commit_tail = tk;
diff --git a/usr/src/uts/common/os/taskq.c b/usr/src/uts/common/os/taskq.c
index 1fe93e9735..5714831e96 100644
--- a/usr/src/uts/common/os/taskq.c
+++ b/usr/src/uts/common/os/taskq.c
@@ -1167,7 +1167,7 @@ taskq_dispatch(taskq_t *tq, task_func_t func, void *arg, uint_t flags)
 		if ((tqe = taskq_ent_alloc(tq, flags)) == NULL) {
 			tq->tq_nomem++;
 			mutex_exit(&tq->tq_lock);
-			return (NULL);
+			return ((taskqid_t)tqe);
 		}
 		/* Make sure we start without any flags */
 		tqe->tqent_un.tqent_flags = 0;
diff --git a/usr/src/uts/common/os/zone.c b/usr/src/uts/common/os/zone.c
index e89cf2c06d..c759f7e010 100644
--- a/usr/src/uts/common/os/zone.c
+++ b/usr/src/uts/common/os/zone.c
@@ -3836,9 +3836,9 @@ zsched(void *arg)
 	bcopy("zsched", PTOU(pp)->u_psargs, sizeof ("zsched"));
 	bcopy("zsched", PTOU(pp)->u_comm, sizeof ("zsched"));
 	PTOU(pp)->u_argc = 0;
-	PTOU(pp)->u_argv = NULL;
-	PTOU(pp)->u_envp = NULL;
-	PTOU(pp)->u_commpagep = NULL;
+	PTOU(pp)->u_argv = 0;
+	PTOU(pp)->u_envp = 0;
+	PTOU(pp)->u_commpagep = 0;
 	closeall(P_FINFO(pp));
 
 	/*
diff --git a/usr/src/uts/common/syscall/lgrpsys.c b/usr/src/uts/common/syscall/lgrpsys.c
index be60d1a445..34bd08fd12 100644
--- a/usr/src/uts/common/syscall/lgrpsys.c
+++ b/usr/src/uts/common/syscall/lgrpsys.c
@@ -182,7 +182,7 @@ meminfo(int addr_count, struct meminfo *mip)
 				out_array[i] = lgrp->lgrp_id;
 				val_array[i] = VALID_ADDR | VALID_REQ;
 			} else {
-				out_array[i] = NULL;
+				out_array[i] = 0;
 				val_array[i] = 0;
 			}
 		}
@@ -1857,7 +1857,7 @@ lgrp_snapshot_copy32(caddr32_t buf, size32_t bufsize)
 	snap_size = snap_hdr_size + info_size + cpuids_size + bitmasks_size +
 	    lats_size;
 
-	if (buf == NULL || bufsize <= 0) {
+	if (buf == 0 || bufsize <= 0) {
 		return (snap_size);
 	}
 
diff --git a/usr/src/uts/common/syscall/lwp_create.c b/usr/src/uts/common/syscall/lwp_create.c
index 53ecd8c5e2..361654cabb 100644
--- a/usr/src/uts/common/syscall/lwp_create.c
+++ b/usr/src/uts/common/syscall/lwp_create.c
@@ -126,7 +126,7 @@ syslwp_create(ucontext_t *ucp, int flags, id_t *new_lwp)
 	mutex_enter(&curproc->p_lock);
 	pool_barrier_enter();
 	mutex_exit(&curproc->p_lock);
-	lwp = lwp_create(lwp_rtt, NULL, NULL, curproc, TS_STOPPED,
+	lwp = lwp_create(lwp_rtt, NULL, 0, curproc, TS_STOPPED,
 	    curthread->t_pri, &sigmask, curthread->t_cid, 0);
 	mutex_enter(&curproc->p_lock);
 	pool_barrier_exit();
diff --git a/usr/src/uts/common/syscall/poll.c b/usr/src/uts/common/syscall/poll.c
index 6ffef9e3ec..ae34556f14 100644
--- a/usr/src/uts/common/syscall/poll.c
+++ b/usr/src/uts/common/syscall/poll.c
@@ -499,12 +499,12 @@ poll_common(pollfd_t *fds, nfds_t nfds, timespec_t *tsp, k_sigset_t *ksetp)
 
 			/*
 			 * Note that pcs_usradr field of an used entry won't be
-			 * NULL because it stores the address of passed-in fds,
-			 * and NULL fds will not be cached (Then it is either
+			 * 0 because it stores the address of passed-in fds,
+			 * and 0 fds will not be cached (Then it is either
 			 * the special timeout case when nfds is 0 or it returns
 			 * failure directly).
 			 */
-			if (pcset[cacheindex].pcs_usradr == NULL) {
+			if (pcset[cacheindex].pcs_usradr == (uintptr_t)NULL) {
 				/*
 				 * found an unused entry. Use it to cache
 				 * this poll list.
@@ -2178,7 +2178,7 @@ pcacheset_cache_list(pollstate_t *ps, pollfd_t *fds, int *fdcntp, int which)
 			pcacheset_remove_list(ps, pollfdp, 0, i, which, 0);
 			kmem_free(newfdlist, ps->ps_nfds * sizeof (pollfd_t));
 			pcacheset[which].pcs_pollfd = NULL;
-			pcacheset[which].pcs_usradr = NULL;
+			pcacheset[which].pcs_usradr = (uintptr_t)NULL;
 			break;
 		}
 	}
diff --git a/usr/src/uts/common/syscall/uadmin.c b/usr/src/uts/common/syscall/uadmin.c
index 3f261fcda4..858305504d 100644
--- a/usr/src/uts/common/syscall/uadmin.c
+++ b/usr/src/uts/common/syscall/uadmin.c
@@ -280,7 +280,7 @@ kadmin(int cmd, int fcn, void *mdep, cred_t *credp)
 		 * vfs_syncall() can acquire the vfs locks they need.
 		 */
 		sema_p(&fsflush_sema);
-		(void) callb_execute_class(CB_CL_UADMIN_PRE_VFS, NULL);
+		(void) callb_execute_class(CB_CL_UADMIN_PRE_VFS, 0);
 
 		vfs_unmountall();
 		(void) VFS_MOUNTROOT(rootvfs, ROOT_UNMOUNT);
@@ -442,7 +442,7 @@ uadmin(int cmd, int fcn, uintptr_t mdep)
 	 * Certain subcommands intepret a non-NULL mdep value as a pointer to
 	 * a boot string.  We pull that in as bootargs, if applicable.
 	 */
-	if (mdep != NULL &&
+	if (mdep != (uintptr_t)NULL &&
 	    (cmd == A_SHUTDOWN || cmd == A_REBOOT || cmd == A_DUMP ||
 	    cmd == A_FREEZE || cmd == A_CONFIG)) {
 		bootargs = kmem_zalloc(BOOTARGS_MAX, KM_SLEEP);
diff --git a/usr/src/uts/common/vm/hat_refmod.c b/usr/src/uts/common/vm/hat_refmod.c
index ad15becea4..31a85d4cf6 100644
--- a/usr/src/uts/common/vm/hat_refmod.c
+++ b/usr/src/uts/common/vm/hat_refmod.c
@@ -230,7 +230,7 @@ hat_freestat(struct as *as, int id)
 	mutex_enter(&hat_statlock);
 
 	for (prev_ahrm = NULL; hrm; hrm = hrm->hrm_anext) {
-		if ((id == hrm->hrm_id) || (id == NULL)) {
+		if ((id == hrm->hrm_id) || (id == 0)) {
 
 			hrm_hashout(hrm);
 			hrm->hrm_hnext = hrm_blist;
diff --git a/usr/src/uts/common/vm/seg_kp.c b/usr/src/uts/common/vm/seg_kp.c
index d33ff004f1..02c844bff6 100644
--- a/usr/src/uts/common/vm/seg_kp.c
+++ b/usr/src/uts/common/vm/seg_kp.c
@@ -1357,7 +1357,7 @@ swapsize(caddr_t v)
 	if ((kpd = segkp_find(segkp, v)) != NULL)
 		return (SEGKP_MAPLEN(kpd->kp_len, kpd->kp_flags));
 	else
-		return (NULL);
+		return (0);
 }
 
 /*
diff --git a/usr/src/uts/intel/ia32/syscall/getcontext.c b/usr/src/uts/intel/ia32/syscall/getcontext.c
index cb5a5b52ba..d5dfd5a9cd 100644
--- a/usr/src/uts/intel/ia32/syscall/getcontext.c
+++ b/usr/src/uts/intel/ia32/syscall/getcontext.c
@@ -74,7 +74,7 @@ savecontext(ucontext_t *ucp, const k_sigset_t *mask)
 	 * been disabled for this LWP. If stack bounds checking is disabled
 	 * or the copyin() fails, we fall back to the legacy behavior.
 	 */
-	if (lwp->lwp_ustack == NULL ||
+	if (lwp->lwp_ustack == (uintptr_t)NULL ||
 	    copyin((void *)lwp->lwp_ustack, &ucp->uc_stack,
 	    sizeof (ucp->uc_stack)) != 0 ||
 	    ucp->uc_stack.ss_size == 0) {
@@ -266,7 +266,7 @@ savecontext32(ucontext32_t *ucp, const k_sigset_t *mask)
 	ucp->uc_flags = UC_ALL;
 	ucp->uc_link = (caddr32_t)lwp->lwp_oldcontext;
 
-	if (lwp->lwp_ustack == NULL ||
+	if (lwp->lwp_ustack == (uintptr_t)NULL ||
 	    copyin((void *)lwp->lwp_ustack, &ucp->uc_stack,
 	    sizeof (ucp->uc_stack)) != 0 ||
 	    ucp->uc_stack.ss_size == 0) {