diff options
| author | paul <paul@FreeBSD.org> | 2000-05-03 17:45:04 +0000 |
|---|---|---|
| committer | paul <paul@FreeBSD.org> | 2000-05-03 17:45:04 +0000 |
| commit | 8864544bcf0eb6baa94793b373780ec2d5d732c7 (patch) | |
| tree | e639589d1f6f856fb3e03ed1414ec343d2565744 /sys/kern/subr_bus.c | |
| parent | c7cde3fa560af8f56d6c264d3c49feeaedc35542 (diff) | |
| download | FreeBSD-src-8864544bcf0eb6baa94793b373780ec2d5d732c7.zip FreeBSD-src-8864544bcf0eb6baa94793b373780ec2d5d732c7.tar.gz | |
If BUS_DEBUG is defined then create a sysctl, debug.bus_debug, that
is used to control whether the debug messages are output at runtime.
It defaults to on so that if you define BUS_DEBUG in your kernel
then you get all the debugging info when you boot.
It's very useful for disabling all the debugging info when you're
developing a loadable device driver and you're doing lots of loads
and unloads but don't always want to see all the debugging info.
Diffstat (limited to 'sys/kern/subr_bus.c')
| -rw-r--r-- | sys/kern/subr_bus.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c index de36141..ddd1e4f 100644 --- a/sys/kern/subr_bus.c +++ b/sys/kern/subr_bus.c @@ -46,7 +46,12 @@ MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); #ifdef BUS_DEBUG -#define PDEBUG(a) (printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n")) +#include <sys/sysctl.h> + +static int bus_debug = 1; +SYSCTL_INT(_debug, OID_AUTO, bus_debug, CTLFLAG_RW, &bus_debug, 0, "Debug bus code"); + +#define PDEBUG(a) if (bus_debug) {printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n");} #define DEVICENAME(d) ((d)? device_get_name(d): "no device") #define DRIVERNAME(d) ((d)? d->name : "no driver") #define DEVCLANAME(d) ((d)? d->name : "no devclass") |
