From b0756b5adefcb51eaa84810a0b7abd4df8c19eb9 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Fri, 18 Oct 2013 21:18:46 +0200
Subject: [PATCH] parisc: make "make install" not depend on vmlinux

Install targets (install, zinstall, uinstall) on parisc have a
dependency to vmlinux. This may cause parts of the kernel to be rebuilt
during installation. We must avoid this since this may run as root.
Install targets "ABSOLUTELY MUST NOT MODIFY THE SOURCE TREE." as Linus
emphasized this in:

http://lkml.org/lkml/2013/7/10/600

So on parisc and maybe other archs we need the same as for x86:

1648e4f8 x86, kbuild: make "make install" not depend on vmlinux

This parisc patch was inspired by:

19514fc6 arm, kbuild: make "make install" not depend on vmlinux

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/Makefile   | 22 ++++++++++++++-------
 arch/parisc/install.sh | 44 ++++++++++++++++++++++++++++++++++--------
 2 files changed, 51 insertions(+), 15 deletions(-)

diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index e02f665f804a..7187664034c3 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -94,7 +94,7 @@ PALOCONF := $(shell if [ -f $(src)/palo.conf ]; then echo $(src)/palo.conf; \
 	else echo $(obj)/palo.conf; \
 	fi)
 
-palo: vmlinuz
+palo lifimage: vmlinuz
 	@if test ! -x "$(PALO)"; then \
 		echo 'ERROR: Please install palo first (apt-get install palo)';\
 		echo 'or build it from source and install it somewhere in your $$PATH';\
@@ -109,16 +109,23 @@ palo: vmlinuz
 	fi
 	$(PALO) -f $(PALOCONF)
 
-# Shorthands for known targets not supported by parisc, use vmlinux/vmlinuz as default
+BOOT_TARGETS    = zImage Image palo lifimage
+INSTALL_TARGETS = zinstall install
+
+PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
+
+bzImage zImage: vmlinuz
 Image: vmlinux
-zImage bzImage: vmlinuz
 
 vmlinuz: vmlinux
 	@gzip -cf -9 $< > $@
 
-install: vmlinuz
-	sh $(src)/arch/parisc/install.sh \
-			$(KERNELRELEASE) $< System.map "$(INSTALL_PATH)"
+install:
+	$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \
+			$(KERNELRELEASE) vmlinux System.map "$(INSTALL_PATH)"
+zinstall:
+	$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \
+			$(KERNELRELEASE) vmlinuz System.map "$(INSTALL_PATH)"
 
 CLEAN_FILES	+= lifimage
 MRPROPER_FILES	+= palo.conf
@@ -127,10 +134,11 @@ define archhelp
 	@echo  '* vmlinux	- Uncompressed kernel image (./vmlinux)'
 	@echo  '  vmlinuz	- Compressed kernel image (./vmlinuz)'
 	@echo  '  palo		- Bootable image (./lifimage)'
-	@echo  '  install	- Install kernel using'
+	@echo  '  install	- Install uncompressed vmlinux kernel using'
 	@echo  '		  (your) ~/bin/$(INSTALLKERNEL) or'
 	@echo  '		  (distribution) /sbin/$(INSTALLKERNEL) or'
 	@echo  '		  copy to $$(INSTALL_PATH)'
+	@echo  '  zinstall	- Install compressed vmlinuz kernel'
 endef
 
 # we require gcc 3.3 or above to compile the kernel
diff --git a/arch/parisc/install.sh b/arch/parisc/install.sh
index 4da682b466d0..6f68784fea25 100644
--- a/arch/parisc/install.sh
+++ b/arch/parisc/install.sh
@@ -19,20 +19,48 @@
 #   $4 - default install path (blank if root directory)
 #
 
+verify () {
+	if [ ! -f "$1" ]; then
+		echo ""                                                   1>&2
+		echo " *** Missing file: $1"                              1>&2
+		echo ' *** You need to run "make" before "make install".' 1>&2
+		echo ""                                                   1>&2
+		exit 1
+	fi
+}
+
+# Make sure the files actually exist
+
+verify "$2"
+verify "$3"
+
 # User may have a custom install script
 
-if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi
-if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
+if [ -n "${INSTALLKERNEL}" ]; then
+  if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi
+  if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
+fi
 
 # Default install
 
-if [ -f $4/vmlinuz ]; then
-	mv $4/vmlinuz $4/vmlinuz.old
+if [ "$(basename $2)" = "zImage" ]; then
+# Compressed install
+  echo "Installing compressed kernel"
+  base=vmlinuz
+else
+# Normal install
+  echo "Installing normal kernel"
+  base=vmlinux
 fi
 
-if [ -f $4/System.map ]; then
-	mv $4/System.map $4/System.old
+if [ -f $4/$base-$1 ]; then
+  mv $4/$base-$1 $4/$base-$1.old
 fi
+cat $2 > $4/$base-$1
+
+# Install system map file
+if [ -f $4/System.map-$1 ]; then
+  mv $4/System.map-$1 $4/System.map-$1.old
+fi
+cp $3 $4/System.map-$1
 
-cat $2 > $4/vmlinuz
-cp $3 $4/System.map