2005-04-17 06:20:36 +08:00
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###
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2007-09-05 12:23:22 +08:00
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# Makefile.basic lists the most basic programs used during the build process.
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# The programs listed herein are what are needed to do the basic stuff,
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# such as fix file dependencies.
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2005-04-17 06:20:36 +08:00
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# This initial step is needed to avoid files to be recompiled
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# when kernel configuration changes (which is what happens when
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# .config is included by main Makefile.
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# ---------------------------------------------------------------------------
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# fixdep: Used to generate dependency information during build process
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2007-09-05 12:23:22 +08:00
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# docproc: Used in Documentation/DocBook
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2005-04-17 06:20:36 +08:00
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driver core: basic infrastructure for per-module dynamic debug messages
Base infrastructure to enable per-module debug messages.
I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes
control of debugging statements on a per-module basis in one /proc file,
currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG,
is not set, debugging statements can still be enabled as before, often by
defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no
affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set.
The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That
is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls
can be dynamically enabled/disabled on a per-module basis.
Future plans include extending this functionality to subsystems, that define
their own debug levels and flags.
Usage:
Dynamic debugging is controlled by the debugfs file,
<debugfs>/dynamic_printk/modules. This file contains a list of the modules that
can be enabled. The format of the file is as follows:
<module_name> <enabled=0/1>
.
.
.
<module_name> : Name of the module in which the debug call resides
<enabled=0/1> : whether the messages are enabled or not
For example:
snd_hda_intel enabled=0
fixup enabled=1
driver enabled=0
Enable a module:
$echo "set enabled=1 <module_name>" > dynamic_printk/modules
Disable a module:
$echo "set enabled=0 <module_name>" > dynamic_printk/modules
Enable all modules:
$echo "set enabled=1 all" > dynamic_printk/modules
Disable all modules:
$echo "set enabled=0 all" > dynamic_printk/modules
Finally, passing "dynamic_printk" at the command line enables
debugging for all modules. This mode can be turned off via the above
disable command.
[gkh: minor cleanups and tweaks to make the build work quietly]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-13 04:46:19 +08:00
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hostprogs-y := fixdep docproc hash
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2005-04-17 06:20:36 +08:00
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always := $(hostprogs-y)
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# fixdep is needed to compile other host programs
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$(addprefix $(obj)/,$(filter-out fixdep,$(always))): $(obj)/fixdep
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