Revert r267961, r267973:

These changes prevent sysctl(8) from returning proper output,
such as:

 1) no output from sysctl(8)
 2) erroneously returning ENOMEM with tools like truss(1)
    or uname(1)
 truss: can not get etype: Cannot allocate memory

3 files changed, 13 insertions, 7 deletions

diff --git a/sys/arm/xscale/ixp425/if_npe.c b/sys/arm/xscale/ixp425/if_npe.c
index d1ef51c..aae31a0 100644
--- a/sys/arm/xscale/ixp425/if_npe.c
+++ b/sys/arm/xscale/ixp425/if_npe.c
@@ -255,8 +255,9 @@ static SYSCTL_NODE(_hw, OID_AUTO, npe, CTLFLAG_RD, 0,
     "IXP4XX NPE driver parameters");
 
 static int npe_debug = 0;
-SYSCTL_INT(_hw_npe, OID_AUTO, debug, CTLFLAG_RWTUN, &npe_debug,
+SYSCTL_INT(_hw_npe, OID_AUTO, debug, CTLFLAG_RW, &npe_debug,
 	   0, "IXP4XX NPE network interface debug msgs");
+TUNABLE_INT("hw.npe.debug", &npe_debug);
 #define	DPRINTF(sc, fmt, ...) do {					\
 	if (sc->sc_debug) device_printf(sc->sc_dev, fmt, __VA_ARGS__);	\
 } while (0)
@@ -264,15 +265,18 @@ SYSCTL_INT(_hw_npe, OID_AUTO, debug, CTLFLAG_RWTUN, &npe_debug,
 	if (sc->sc_debug >= n) device_printf(sc->sc_dev, fmt, __VA_ARGS__);\
 } while (0)
 static int npe_tickinterval = 3;		/* npe_tick frequency (secs) */
-SYSCTL_INT(_hw_npe, OID_AUTO, tickinterval, CTLFLAG_RDTUN, &npe_tickinterval,
+SYSCTL_INT(_hw_npe, OID_AUTO, tickinterval, CTLFLAG_RD, &npe_tickinterval,
 	    0, "periodic work interval (secs)");
+TUNABLE_INT("hw.npe.tickinterval", &npe_tickinterval);
 
 static	int npe_rxbuf = 64;		/* # rx buffers to allocate */
-SYSCTL_INT(_hw_npe, OID_AUTO, rxbuf, CTLFLAG_RDTUN, &npe_rxbuf,
+SYSCTL_INT(_hw_npe, OID_AUTO, rxbuf, CTLFLAG_RD, &npe_rxbuf,
 	    0, "rx buffers allocated");
+TUNABLE_INT("hw.npe.rxbuf", &npe_rxbuf);
 static	int npe_txbuf = 128;		/* # tx buffers to allocate */
-SYSCTL_INT(_hw_npe, OID_AUTO, txbuf, CTLFLAG_RDTUN, &npe_txbuf,
+SYSCTL_INT(_hw_npe, OID_AUTO, txbuf, CTLFLAG_RD, &npe_txbuf,
 	    0, "tx buffers allocated");
+TUNABLE_INT("hw.npe.txbuf", &npe_txbuf);
 
 static int
 unit2npeid(int unit)
diff --git a/sys/arm/xscale/ixp425/ixp425_npe.c b/sys/arm/xscale/ixp425/ixp425_npe.c
index 6dbce4c..0ccc7d0 100644
--- a/sys/arm/xscale/ixp425/ixp425_npe.c
+++ b/sys/arm/xscale/ixp425/ixp425_npe.c
@@ -181,8 +181,9 @@ typedef struct {
 } IxNpeDlNpeMgrStateInfoBlock;
 
 static int npe_debug = 0;
-SYSCTL_INT(_debug, OID_AUTO, ixp425npe, CTLFLAG_RWTUN, &npe_debug,
+SYSCTL_INT(_debug, OID_AUTO, ixp425npe, CTLFLAG_RW, &npe_debug,
 	   0, "IXP4XX NPE debug msgs");
+TUNABLE_INT("debug.ixp425npe", &npe_debug);
 #define	DPRINTF(dev, fmt, ...) do {					\
 	if (npe_debug) device_printf(dev, fmt, __VA_ARGS__);		\
 } while (0)
diff --git a/sys/arm/xscale/ixp425/ixp425_qmgr.c b/sys/arm/xscale/ixp425/ixp425_qmgr.c
index cb6c8de..b6fe434 100644
--- a/sys/arm/xscale/ixp425/ixp425_qmgr.c
+++ b/sys/arm/xscale/ixp425/ixp425_qmgr.c
@@ -159,9 +159,10 @@ struct ixpqmgr_softc {
 	uint32_t		aqmFreeSramAddress;	/* SRAM free space */
 };
 
-static int qmgr_debug;
-SYSCTL_INT(_debug, OID_AUTO, qmgr, CTLFLAG_RWTUN, &qmgr_debug,
+static int qmgr_debug = 0;
+SYSCTL_INT(_debug, OID_AUTO, qmgr, CTLFLAG_RW, &qmgr_debug,
 	   0, "IXP4XX Q-Manager debug msgs");
+TUNABLE_INT("debug.qmgr", &qmgr_debug);
 #define	DPRINTF(dev, fmt, ...) do {					\
 	if (qmgr_debug) printf(fmt, __VA_ARGS__);			\
 } while (0)