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From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@elte.hu>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Theodore Tso <tytso@mit.edu>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	zippel@linux-m68k.org, linux-kbuild@vger.kernel.org,
	Sam Ravnborg <sam@ravnborg.org>
Subject: [PATCH 7/7] kconfig: search for a config to base the local(mod|yes)config on
Date: Thu, 30 Apr 2009 14:50:29 -0400
Message-ID: <20090430185223.792841532@goodmis.org> (raw)
In-Reply-To: <20090430185022.122124349@goodmis.org>


[-- Attachment #0: 0007-kconfig-search-for-a-config-to-base-the-local-mod-y.patch --]
[-- Type: text/plain, Size: 2567 bytes --]

From: Steven Rostedt <srostedt@redhat.com>

Instead of using the .config in the local directory. This patch
changes streamline_config.pl to search various locations for a config.

Here's the list and order of search:

  /proc/config.gz
  /boot/vmlinuz-`uname -r`
  vmlinux  # local to the directory
  /lib/modules/`uname -r`/kernel/kernel/configs.ko
  kernel/configs.ko
  kernel/configs.o
  .config

Once it finds a file that contains a config (it checks if the binary
objects have configs first) it then uses it to create the .config
with minimum modules needed.

[ Impact: use mostly the current config ]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 scripts/kconfig/streamline_config.pl |   63 +++++++++++++++++++++++++++++++++-
 1 files changed, 62 insertions(+), 1 deletions(-)

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 2334641..9fa3f81 100644
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -45,7 +45,68 @@
 my $config = ".config";
 my $linuxpath = ".";
 
-open(CIN,$config) || die "Can't open current config file: $config";
+my $uname = `uname -r`;
+chomp $uname;
+
+my @searchconfigs = (
+	{
+	    "file" => "/proc/config.gz",
+	    "exec" => "zcat",
+	},
+	{
+	    "file" => "/boot/vmlinuz-$uname",
+	    "exec" => "scripts/extract-ikconfig",
+	    "test" => "scripts/extract-ikconfig",
+	},
+	{
+	    "file" => "vmlinux",
+	    "exec" => "scripts/extract-ikconfig",
+	    "test" => "scripts/extract-ikconfig",
+	},
+	{
+	    "file" => "/lib/modules/$uname/kernel/kernel/configs.ko",
+	    "exec" => "scripts/extract-ikconfig",
+	    "test" => "scripts/extract-ikconfig",
+	},
+	{
+	    "file" => "kernel/configs.ko",
+	    "exec" => "scripts/extract-ikconfig",
+	    "test" => "scripts/extract-ikconfig",
+	},
+	{
+	    "file" => "kernel/configs.o",
+	    "exec" => "scripts/extract-ikconfig",
+	    "test" => "scripts/extract-ikconfig",
+	},
+	{
+	    "file" => ".config",
+	    "exec" => "cat",
+	},
+);
+
+sub find_config {
+    foreach my $conf (@searchconfigs) {
+	my $file = $conf->{"file"};
+
+	next if ( ! -f "$file");
+
+	if (defined($conf->{"test"})) {
+	    `$conf->{"test"} $conf->{"file"} 2>/dev/null`;
+	    next if ($?);
+	}
+
+	my $exec = $conf->{"exec"};
+
+	print STDERR "using config: '$file'\n";
+
+	open(CIN, "$exec $file |") || die "Failed to run $exec $file";
+	return;
+    }
+    die "No config file found";
+}
+
+find_config;
+
 my @makefiles = `find $linuxpath -name Makefile`;
 my %depends;
 my %selects;
-- 
1.6.2.1

-- 

  parent reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-30 18:50 [PATCH 0/7] kconfig: more featured minimum module configs Steven Rostedt
2009-04-30 18:50 ` [PATCH 1/7] kconfig: streamline_config.pl do not stop with no depends Steven Rostedt
2009-04-30 18:50 ` [PATCH 2/7] kconfig: do not warn about modules built in Steven Rostedt
2009-04-30 18:50 ` [PATCH 3/7] kconfig: enable CONFIG_IKCONFIG from streamline_config.pl Steven Rostedt
2009-04-30 21:51   ` Alan Jenkins
2009-04-30 22:53     ` Steven Rostedt
2009-04-30 18:50 ` [PATCH 4/7] kconfig: add check if end exists in extract-ikconfig Steven Rostedt
2009-04-30 18:50 ` [PATCH 5/7] kconfig: have extract-ikconfig read ELF files Steven Rostedt
2009-04-30 18:50 ` [PATCH 6/7] kconfig: keep config.gz around even if CONFIG_IKCONFIG_PROC is not set Steven Rostedt
2009-04-30 18:50 ` Steven Rostedt [this message]
2009-04-30 22:04   ` [PATCH 7/7] kconfig: search for a config to base the local(mod|yes)config on Alan Jenkins
2009-04-30 22:54     ` Steven Rostedt
2009-05-04 12:15   ` Andi Kleen
2009-05-04 12:28     ` Peter Zijlstra
2009-05-04 14:46       ` Steven Rostedt
2009-05-04 14:59       ` Andi Kleen
2009-04-30 19:10 ` [PATCH 0/7] kconfig: more featured minimum module configs Ingo Molnar
2009-04-30 22:55   ` Steven Rostedt
2009-05-01 12:01     ` Ingo Molnar
2009-05-01 23:27       ` Steven Rostedt
2009-05-06 12:15         ` Ingo Molnar

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