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  1. 10 6月, 2014 1 次提交
  3. 06 4月, 2013 1 次提交
    • S
      kbuild: fixdep: support concatenated dep files · 2ab8a996
      由 Stephen Warren 提交于 
      The current use-case for fixdep is: a source file is run through a single
processing step, which creates a single dependency file as a side-effect,
which fixdep transforms into the file used by the kernel build process.

In order to transparently run the C pre-processor on device-tree files,
we wish to run both gcc -E and dtc on a source file in a single rule.
This generates two dependency files, which must be transformed together
into the file used by the kernel build process. This change modifies
fixdep so it can process the concatenation of multiple separate input
dependency files, and produce a correct unified output.

The code changes have the slight benefit of transforming the loop in
parse_dep_file() into more of a lexer/tokenizer, with the loop body being
more of a parser. Previously, some of this logic was mixed together
before the loop. I also added some comments, which I hope are useful.

Benchmarking shows that on a cross-compiled ARM tegra_defconfig build,
there is less than 0.5 seconds speed decrease with this change, on top
of a build time of ~2m24s. This is probably within the noise.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NRob Herring <rob.herring@calxeda.com>
      2ab8a996
  5. 09 1月, 2013 1 次提交
  7. 09 9月, 2011 1 次提交
  9. 03 5月, 2011 1 次提交
  11. 14 3月, 2011 1 次提交
  13. 21 2月, 2011 1 次提交
  15. 23 12月, 2010 1 次提交
  17. 12 11月, 2010 1 次提交
    • E
      fixdep: use hash table instead of a single array · 8af27e1d
      由 Eric Dumazet 提交于 
      I noticed fixdep uses ~2% of cpu time in kernel build, in function
use_config()

fixdep spends a lot of cpu cycles in linear searches in its internal
string array. With about 400 stored strings per dep file, this begins to
be noticeable.

Convert fixdep to use a hash table.

kbuild results on my x86_64 allmodconfig

Before patch :

real	10m30.414s
user	61m51.456s
sys	8m28.200s

real	10m12.334s
user	61m50.236s
sys	8m30.448s

real	10m42.947s
user	61m50.028s
sys	8m32.380s

After:

real	10m8.180s
user	61m22.506s
sys	8m32.384s

real	10m35.039s
user	61m21.654s
sys	8m32.212s

real	10m14.487s
user	61m23.498s
sys	8m32.312s
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NMichal Marek <mmarek@suse.cz>
      8af27e1d
  19. 28 10月, 2010 1 次提交
  21. 23 9月, 2010 1 次提交
  23. 12 9月, 2010 1 次提交
  25. 12 12月, 2009 1 次提交
  27. 21 9月, 2009 2 次提交
  29. 20 9月, 2009 1 次提交
  31. 20 6月, 2009 1 次提交
  33. 15 6月, 2009 1 次提交
  35. 10 6月, 2009 1 次提交
  37. 21 10月, 2008 1 次提交
  39. 17 10月, 2008 1 次提交
    • J
      driver core: basic infrastructure for per-module dynamic debug messages · 346e15be
      由 Jason Baron 提交于 
      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: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      346e15be
  41. 29 1月, 2008 2 次提交
  43. 18 10月, 2007 1 次提交
  45. 13 10月, 2007 1 次提交
  47. 09 5月, 2007 1 次提交
  49. 03 5月, 2007 1 次提交
  51. 02 4月, 2007 1 次提交
    • J
      [PATCH] kbuild: fix dependency generation · c21b1e4d
      由 Jan Beulich 提交于 
      Commit 2e3646e5 changed the way the
split config tree is built, but failed to also adjust fixdep accordingly
- if changing a config option from or to m, files referencing the
respective CONFIG_..._MODULE (but not the corresponding CONFIG_...)
didn't get rebuilt.

The problem is that trisate symbol are represent with three different
symbols:
    SYMBOL=n => no symbol defined
    SYMBOL=y => CONFIG_SYMBOL defined to '1'
    SYMBOL=m => CONFIG_SYMBOL_MODULE defined to '1'

But conf_split_config do not distingush between the =y and =m case, so
only the =y case is honoured.

This is fixed in fixdep so when a CONFIG symbol with _MODULE is found we
skip that part and only look for the CONFIG_SYMBOL version.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      c21b1e4d
  53. 04 11月, 2006 1 次提交
  55. 30 9月, 2006 1 次提交
  57. 09 6月, 2006 1 次提交
  59. 19 2月, 2006 1 次提交
    • J
      kbuild: consolidate command line escaping · 6176aa9a
      由 Jan Beulich 提交于 
      While the recent change to also escape # symbols when storing C-file
compilation command lines was helpful, it should be in effect for all
command lines, as much as the dollar escaping should be in effect for
C-source compilation commands. Additionally, for better readability and
maintenance, consolidating all the escaping (single quotes, dollars,
and now sharps) was also desirable.
Signed-Off-By: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      6176aa9a
  61. 26 12月, 2005 1 次提交
  63. 18 10月, 2005 1 次提交
  65. 26 6月, 2005 1 次提交
  67. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      由 Linus Torvalds 提交于 
      Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
      1da177e4