. new kernel call sysctl for generic unprivileged system operations;

now used for printing diagnostic messages through the kernel message
   buffer. this lets processes print diagnostics without sending messages
   to tty and log directly, simplifying the message protocol a lot and
   reducing difficulties with deadlocks and other situations in which
   diagnostics are blackholed (e.g. grants don't work). this makes
   DIAGNOSTICS(_S), ASYN_DIAGNOSTICS and DIAG_REPL obsolete, although tty
   and log still accept the codes for 'old' binaries. This also simplifies
   diagnostics in several servers and drivers - only tty needs its own
   kputc() now.
 . simplifications in vfs, and some effort to get the vnode references
   right (consistent) even during shutdown. m_mounted_on is now NULL
   for root filesystems (!) (the original and new root), a less awkward
   special case than 'm_mounted_on == m_root_node'. root now has exactly
   one reference, to root, if no files are open, just like all other
   filesystems. m_driver_e is unused.

etc/drivers.conf

@@ -16,6 +16,7 @@ driver floppy
 		SAFECOPYFROM	# 31
 		SAFECOPYTO	# 32
 		PROFBUF		# 38
+		SYSCTL
 		;
 };
 
@@ -31,6 +32,7 @@ driver dp8390
 		SAFECOPYTO	# 32
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 	pci device	10ec/8029;
 	uid	0;
@@ -48,6 +50,7 @@ driver dpeth
 		SAFECOPYTO	# 32
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 	uid	0;
 };
@@ -65,6 +68,7 @@ driver lance
 		SAFECOPYTO	# 32
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 	pci device	1022/2000;
 	uid	0;
@@ -85,6 +89,7 @@ driver rtl8139
 		SETGRANT	# 34
 		MAPDMA		# 41
 		PROFBUF		# 38
+		SYSCTL
 	;
 	pci device	10ec/8139;
 	ipc
@@ -107,6 +112,7 @@ driver fxp
 		SAFECOPYTO	# 32
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 	pci device	8086/1229;
 	ipc
@@ -123,6 +129,7 @@ driver dumpcore
 		GETINFO		# 26
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 };
 
@@ -137,6 +144,7 @@ driver inet
 		VSAFECOPY	# 33
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 	uid 0;
 };
@@ -151,6 +159,7 @@ driver random
 		SAFECOPYTO	# 32
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 };
 
@@ -166,6 +175,7 @@ driver readclock.drv
 		SETGRANT	# 34
 		READBIOS	# 35
 		PROFBUF		# 38
+		SYSCTL
 	;
 	uid 0;
 };
@@ -176,6 +186,7 @@ driver is
 		GETINFO		# 26
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 	uid 0;
 };
@@ -193,6 +204,7 @@ driver pci
 		SAFECOPYTO	# 32
 		SETGRANT	# 34
 		PROFBUF		# 38
+		SYSCTL
 	;
 	uid 0;
 };
@@ -222,6 +234,7 @@ driver at_wini
 		SETGRANT	# 34
 		READBIOS	# 35
 		PROFBUF		# 38
+		SYSCTL
 	;
 	pci class	
 		1/1		# Mass storage / IDE
@@ -238,6 +251,7 @@ driver mfs
 		SETGRANT	# 34
                 UMAP            # 14
 		PROFBUF		# 38
+		SYSCTL
 		;
 	uid	0;
 };
@@ -262,6 +276,7 @@ driver printer
                SAFECOPYFROM    # 31
                SAFECOPYTO      # 32
 		PROFBUF		# 38
+		SYSCTL
        ;
 };
 
@@ -283,6 +298,7 @@ driver orinoco
 		SETGRANT	# 34
 		VM_MAP		# 30
 		PROFBUF		# 38
+		SYSCTL
 	;
 	pci device	1260/3873;
 	uid	0;
@@ -299,6 +315,7 @@ driver es1370
 		IRQCTL          # 19
 		DEVIO           # 21
 		PROFBUF		# 38
+		SYSCTL
 	;
 	pci device 1274/5000;
 };
@@ -314,6 +331,7 @@ driver es1371
 		IRQCTL          # 19
 		DEVIO           # 21
 		PROFBUF		# 38
+		SYSCTL
 	;
 	pci device 1274/1371;
 };
@@ -327,6 +345,7 @@ driver amddev
                 GETINFO
 		REGDEV		# 40
 		PROFBUF		# 38
+		SYSCTL
 	;
 	uid	0;
 };