From ef897fb5484c6c128ef3c7e8979200202709194d Mon Sep 17 00:00:00 2001
From: Tim Yamin <plasmaroo@gentoo.org>
Date: Sat, 27 Nov 2004 13:33:25 +0000
Subject: [PATCH] Udev speedups; thanks to Eric Edgar for the patch - bug
 #72253.

git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/genkernel/trunk@150 67a159dc-881f-0410-a524-ba9dfbe2cb84
---
 gen_initrd.sh          |  2 ++
 generic/initrd.scripts | 48 ++++++++----------------------------------
 generic/linuxrc        |  8 +++++++
 3 files changed, 19 insertions(+), 39 deletions(-)

diff --git a/gen_initrd.sh b/gen_initrd.sh
index dbfadab..7923276 100644
--- a/gen_initrd.sh
+++ b/gen_initrd.sh
@@ -82,6 +82,8 @@ create_base_initrd_sys() {
 
 	[ "${UDEV}" -eq '1' ] && { tar -jxpf "${UDEV_BINCACHE}" -C "${TEMP}/initrd-temp" ||
 		gen_die "Could not extract udev binary cache!"; }
+		ln -sf "./udev" "${TEMP}/initrd-temp/bin/udevstart" ||
+			gen_die 'Could not symlink udev -> udevstart!'
 
 # We make our own devfsd.conf these days, the default one doesn't work with the stripped
 # down devfsd we use with dietlibc
diff --git a/generic/initrd.scripts b/generic/initrd.scripts
index f2fed9b..06ba683 100644
--- a/generic/initrd.scripts
+++ b/generic/initrd.scripts
@@ -65,45 +65,15 @@ kill_devfsd() {
 }
 
 runUdev() {
-	export ACTION=add
-	export UDEV_NO_SLEEP=1
 
-	# Add block devices and their partitions to /dev,
-	# using information from /sys, and only those
-	# devices (since other are not needed for boot).
+	mount -t tmpfs -o size=100k udev /dev
+	mkdir /dev/pts
+	mkdir /dev/shm
+	/sbin/udevstart
+	ln -snf /proc/self/fd /dev/fd
+	ln -snf /proc/self/fd/0 /dev/stdin
+	ln -snf /proc/self/fd/1 /dev/stdout
+	ln -snf /proc/self/fd/2 /dev/stderr
+	ln -snf /proc/kcore /dev/core
 
-	# We also do VC's for keymap support.
-
-	for x in block/*
-	do
-		export DEVPATH="/${x}"
-		/sbin/udev block
-
-		for y in ${x}/*
-		do
-			if [ -f "${y}/dev" ]
-			then
-				export DEVPATH="/${y}"
-				/sbin/udev block
-			fi
-		done
-	done
-	for x in class/tty
-	do
-		export DEVPATH="/${x}"
-		/sbin/udev class
-
-		for y in ${x}/*
-		do
-			if [ -f "${y}/dev" ]
-			then
-				export DEVPATH="/${y}"
-				/sbin/udev class
-			fi
-		done
-	done
-	
-	cd /
-
-	unset -v ACTION DEVPATH UDEV_NO_SLEEP
 }
diff --git a/generic/linuxrc b/generic/linuxrc
index 7d5c33f..0d27da2 100644
--- a/generic/linuxrc
+++ b/generic/linuxrc
@@ -147,6 +147,7 @@ then
 	then
 		cd /sys
 		kill_devfsd
+		echo -e "${GOOD}>>${NORMAL}${BOLD} Activating udev...${NORMAL}"
 		runUdev
 		mv /dev/* /newroot/dev
 	else
@@ -214,6 +215,7 @@ if [ "${USE_UDEV_NORMAL}" -eq '1' -a "${CDROOT}" -eq '0' ]
 then
 	USE_DEVFS_NORMAL=0
 	cd /sys
+	echo -e "${GOOD}>>${NORMAL}${BOLD} Activating udev...${NORMAL}"
 	runUdev
 elif [ "${CDROOT}" -eq '0' -a "${USE_DEVFS_NORMAL}" -eq '1' ]
 then
@@ -419,6 +421,12 @@ then
 	rm /tmp/.initrd/dev -rf || '*: Failed to remove the initrd /dev!'
 elif [ "${USE_UDEV_NORMAL}" -eq '1' ]
 then
+	rm /tmp/.initrd/dev/fd || echo '*: Failed to rm the initrd fd!'
+	rm /tmp/.initrd/dev/stdin || echo '*: Failed to rm the initrd stdin!'
+	rm /tmp/.initrd/dev/stdout || echo '*: Failed to rm the initrd stdout!'
+	rm /tmp/.initrd/dev/stderr || echo '*: Failed to rm the initrd stderr!'
+	rm /tmp/.initrd/dev/core || echo '*: Failed to rm the initrd core!'
+	umount /tmp/.initrd/dev || echo '*: Failed to unmount the initrd /dev!'
 	umount /tmp/.initrd/proc || echo '*: Failed to unmount the initrd /proc!'
 	umount /tmp/.initrd/sys || echo '*: Failed to unmount the initrd /sys!'
 elif [ "${CDROOT}" -eq '1' ]
-- 
2.26.2