From 09280615a0d924b3ab79acbff950f92c3420fd76 Mon Sep 17 00:00:00 2001
From: Josh Boyer <jwboyer@redhat.com>
Date: Wed, 1 Feb 2012 12:01:58 -0500
Subject: [PATCH] merge_config.sh: Use the first file as the initial config

Take the first config fragment and use it verbatim as the initial config
set.  This avoids running the verification loop for the first file, as
nothing has actually been merged at this point.  This significantly
increases performance for large config fragments.

Signed-off-by: Josh Boyer <jwboyer@redhat.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Acked-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
---
 scripts/kconfig/merge_config.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/scripts/kconfig/merge_config.sh b/scripts/kconfig/merge_config.sh
index ceadf0e150cf..23d738a1acda 100644
--- a/scripts/kconfig/merge_config.sh
+++ b/scripts/kconfig/merge_config.sh
@@ -58,12 +58,16 @@ while true; do
 	esac
 done
 
-
+INITFILE=$1
+shift;
 
 MERGE_LIST=$*
 SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
 
+echo "Using $INITFILE as base"
+cat $INITFILE > $TMP_FILE
+
 # Merge files, printing warnings on overrided values
 for MERGE_FILE in $MERGE_LIST ; do
 	echo "Merging $MERGE_FILE"