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Subject[PATCH] obsolete config in kernel source (DVB_DIBCOM_DEBUG)
Hi all!

As part of the VAMOS[0] research project at the University of
Erlangen we're checking referential integrity between kernel KConfig
options and in-code Conditional blocks.

By this we discovered the config Option DVB_DIBCOM_DEBUG,
which was dropped while removing the dibusb driver in favor of dvb-usb
in 2005. However it remaind existant at some places of the kernel

Probably one should be a bit more agressive here as the dprintk
macro now expands to a do{}while(0) unconditionally so all blocks
using them can also be dropped to remove in-tree cruft but the patch
does a first cleanup.

Please keep me informed of this patch getting confirmed /
merged so we can keep track of it.


Christoph Egger

From 34bc227926b5554a881799fe69ce5323e2042352 Mon Sep 17 00:00:00 2001
From: Christoph Egger <>
Date: Fri, 15 Jan 2010 12:49:41 +0100
Subject: [PATCH 4/4] remove obsolete conditionalizing on DVB_DIBCOM_DEBUG

The dibusb driver was dropped in 2005 in favour of the generic dvb-usb
system. However the DEBUG option wasn't removed from all parts of the
code which is fixed by this patch

Signed-off-by: Christoph Egger <>
drivers/media/dvb/frontends/dib3000mb.c | 11 -----------
drivers/media/dvb/frontends/dib3000mb_priv.h | 5 -----
2 files changed, 0 insertions(+), 16 deletions(-)

diff --git a/drivers/media/dvb/frontends/dib3000mb.c b/drivers/media/dvb/frontends/dib3000mb.c
index ad4c8cf..5fdb6de 100644
--- a/drivers/media/dvb/frontends/dib3000mb.c
+++ b/drivers/media/dvb/frontends/dib3000mb.c
@@ -38,11 +38,6 @@
#define DRIVER_DESC "DiBcom 3000M-B DVB-T demodulator"
#define DRIVER_AUTHOR "Patrick Boettcher,"

-static int debug;
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "set debugging level (1=info,2=xfer,4=setfe,8=getfe (|-able)).");
#define deb_info(args...) dprintk(0x01,args)
#define deb_i2c(args...) dprintk(0x02,args)
#define deb_srch(args...) dprintk(0x04,args)
@@ -51,12 +46,6 @@ MODULE_PARM_DESC(debug, "set debugging level (1=info,2=xfer,4=setfe,8=getfe (|-a
#define deb_setf(args...) dprintk(0x04,args)
#define deb_getf(args...) dprintk(0x08,args)

-static int debug;
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "set debugging level (1=info,2=i2c,4=srch (|-able)).");
static int dib3000_read_reg(struct dib3000_state *state, u16 reg)
u8 wb[] = { ((reg >> 8) | 0x80) & 0xff, reg & 0xff };
diff --git a/drivers/media/dvb/frontends/dib3000mb_priv.h b/drivers/media/dvb/frontends/dib3000mb_priv.h
index 1a12747..806f5b0 100644
--- a/drivers/media/dvb/frontends/dib3000mb_priv.h
+++ b/drivers/media/dvb/frontends/dib3000mb_priv.h
@@ -37,12 +37,7 @@

/* debug */

-#define dprintk(level,args...) \
- do { if ((debug & level)) { printk(args); } } while (0)
#define dprintk(args...) do { } while (0)

/* mask for enabling a specific pid for the pid_filter */
#define DIB3000_ACTIVATE_PID_FILTERING (0x2000)
 \ /
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