make printk option configurable via menuconfig

package/base-files/Makefile

@@ -6,7 +6,7 @@ include $(TOPDIR)/mk/rootfs.mk
 
 PKG_NAME:=		base-files
 PKG_VERSION:=		1.0
-PKG_RELEASE:=		67
+PKG_RELEASE:=		68
 PKG_SECTION:=		base
 PKG_DESCR:=		basic files and scripts
 PKG_BUILDDEP:=		pkgconf-host file-host

package/base-files/src/etc/init.d/boot

@@ -5,7 +5,9 @@
 . /etc/functions.sh
 
 # disable kernel messages
-echo 0 > /proc/sys/kernel/printk
+if [ -f /proc/sys/kernel/printk ];then
+	echo 0 > /proc/sys/kernel/printk
+fi
 
 # remount /dev with smaller size
 mount -o remount,nosuid,size=128k,mode=0755 -t tmpfs mdev /dev

target/linux/config/Config.in.debug

@@ -25,6 +25,34 @@ config ADK_QUIET_KERNEL
 	help
 	  Make bootup quiet without messages from the kernel.
 
+config ADK_KERNEL_EARLY_PRINTK
+	boolean
+	default n
+
+config ADK_KERNEL_PRINTK
+	prompt "Enable printk to save space and quieten bootup"
+	boolean
+	select ADK_KERNEL_EARLY_PRINTK
+	default y
+	help
+	  Disable printk to save space and quieten bootup.
+
+config ADK_KERNEL_PRINTK_TIME
+	prompt "Enable timing information for printk"
+	boolean
+	depends on ADK_KERNEL_PRINTK
+	default n
+	help
+	  Enable timing information for printk, to analyze kernel
+	  bootup performance.
+
+config ADK_KERNEL_BUG
+	prompt "Enable BUGS() in the kernel"
+	boolean
+	default n
+	help
+	  Enable if you need BUGS() in the kernel.
+
 config ADK_KERNEL_NETCONSOLE
 	prompt "Netconsole"
 	boolean

target/linux/kernel.config

@@ -28,8 +28,6 @@ CONFIG_BINFMT_SCRIPT=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_STANDALONE=y
-CONFIG_PRINTK=y
-CONFIG_BUG=n
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_SIGNALFD=y
@@ -40,5 +38,3 @@ CONFIG_AIO=y
 CONFIG_PCI_QUIRKS=y
 CONFIG_TTY=y
 CONFIG_UNIX98_PTYS=y
-CONFIG_PRINTK_TIME=y
-CONFIG_EARLY_PRINTK=y