diff --git a/sys/alpha/alpha/vm_machdep.c b/sys/alpha/alpha/vm_machdep.c
index d15d87edf70a..a40ea11b4507 100644
--- a/sys/alpha/alpha/vm_machdep.c
+++ b/sys/alpha/alpha/vm_machdep.c
@@ -288,8 +288,7 @@ cpu_coredump(p, vp, cred)
 {
 
 	return (vn_rdwr(UIO_WRITE, vp, (caddr_t) p->p_addr, ctob(UPAGES),
-	    (off_t)0, UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *)NULL,
-	    p));
+	    (off_t)0, UIO_SYSSPACE, IO_UNIT, cred, (int *)NULL, p));
 }
 
 /*
diff --git a/sys/amd64/amd64/vm_machdep.c b/sys/amd64/amd64/vm_machdep.c
index 27c22303dbbf..4fc91dd5ea01 100644
--- a/sys/amd64/amd64/vm_machdep.c
+++ b/sys/amd64/amd64/vm_machdep.c
@@ -323,10 +323,8 @@ cpu_coredump(p, vp, cred)
 	      tempuser + ((caddr_t) p->p_frame - (caddr_t) p->p_addr),
 	      sizeof(struct trapframe));
 
-	error = vn_rdwr(UIO_WRITE, vp, (caddr_t) tempuser, 
-			ctob(UPAGES),
-			(off_t)0, UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, 
-			cred, (int *)NULL, p);
+	error = vn_rdwr(UIO_WRITE, vp, (caddr_t) tempuser, ctob(UPAGES),
+			(off_t)0, UIO_SYSSPACE, IO_UNIT, cred, (int *)NULL, p);
 
 	free(tempuser, M_TEMP);
 	
diff --git a/sys/i386/i386/vm_machdep.c b/sys/i386/i386/vm_machdep.c
index 27c22303dbbf..4fc91dd5ea01 100644
--- a/sys/i386/i386/vm_machdep.c
+++ b/sys/i386/i386/vm_machdep.c
@@ -323,10 +323,8 @@ cpu_coredump(p, vp, cred)
 	      tempuser + ((caddr_t) p->p_frame - (caddr_t) p->p_addr),
 	      sizeof(struct trapframe));
 
-	error = vn_rdwr(UIO_WRITE, vp, (caddr_t) tempuser, 
-			ctob(UPAGES),
-			(off_t)0, UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, 
-			cred, (int *)NULL, p);
+	error = vn_rdwr(UIO_WRITE, vp, (caddr_t) tempuser, ctob(UPAGES),
+			(off_t)0, UIO_SYSSPACE, IO_UNIT, cred, (int *)NULL, p);
 
 	free(tempuser, M_TEMP);
 	
diff --git a/sys/ia64/ia64/vm_machdep.c b/sys/ia64/ia64/vm_machdep.c
index 763a9e48519d..d7443a0604f0 100644
--- a/sys/ia64/ia64/vm_machdep.c
+++ b/sys/ia64/ia64/vm_machdep.c
@@ -331,8 +331,7 @@ cpu_coredump(p, vp, cred)
 {
 
 	return (vn_rdwr(UIO_WRITE, vp, (caddr_t) p->p_addr, ctob(UPAGES),
-	    (off_t)0, UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *)NULL,
-	    p));
+	    (off_t)0, UIO_SYSSPACE, IO_UNIT, cred, (int *)NULL, p));
 }
 
 /*
diff --git a/sys/powerpc/aim/vm_machdep.c b/sys/powerpc/aim/vm_machdep.c
index 15cf1388d056..e811fc891b50 100644
--- a/sys/powerpc/aim/vm_machdep.c
+++ b/sys/powerpc/aim/vm_machdep.c
@@ -204,8 +204,7 @@ cpu_coredump(p, vp, cred)
 {
 
 	return (vn_rdwr(UIO_WRITE, vp, (caddr_t) p->p_addr, ctob(UPAGES),
-	    (off_t)0, UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *)NULL,
-	    p));
+	    (off_t)0, UIO_SYSSPACE, IO_UNIT, cred, (int *)NULL, p));
 }
 
 /*
diff --git a/sys/powerpc/powerpc/vm_machdep.c b/sys/powerpc/powerpc/vm_machdep.c
index 15cf1388d056..e811fc891b50 100644
--- a/sys/powerpc/powerpc/vm_machdep.c
+++ b/sys/powerpc/powerpc/vm_machdep.c
@@ -204,8 +204,7 @@ cpu_coredump(p, vp, cred)
 {
 
 	return (vn_rdwr(UIO_WRITE, vp, (caddr_t) p->p_addr, ctob(UPAGES),
-	    (off_t)0, UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *)NULL,
-	    p));
+	    (off_t)0, UIO_SYSSPACE, IO_UNIT, cred, (int *)NULL, p));
 }
 
 /*