From 6236c3a196416da10e08795f2f235cc07e02b829 Mon Sep 17 00:00:00 2001
From: Seth Jennings <sjenning@redhat.com>
Date: Tue, 29 Apr 2014 11:10:22 -0500
Subject: [PATCH] Ubuntu support for kpatch-build

At this point the module does build (i.e. kpatch-build is correct);
however, the addresses in the generated vmlinux don't match that
of the running kernel so the modules fail to load with an ftrace
registration error. So that is something to be investigated.

Signed-off-by: Seth Jennings <sjenning@redhat.com>
---
 kpatch-build/kpatch-build | 57 ++++++++++++++++++++++++++-------------
 1 file changed, 39 insertions(+), 18 deletions(-)

diff --git a/kpatch-build/kpatch-build b/kpatch-build/kpatch-build
index 96e64a7..863fc5d 100755
--- a/kpatch-build/kpatch-build
+++ b/kpatch-build/kpatch-build
@@ -176,27 +176,48 @@ elif [[ -d "$SRCDIR" ]]; then
 	echo "Using cache at $SRCDIR"
 
 else
-	rpm -q --quiet rpmdevtools || die "rpmdevtools not installed"
+	if grep -q "Fedora" "/etc/issue" || grep -q "Red Hat" "/etc/issue"; then
 
-	if [[ -z "$SRCRPM" ]]; then
-		rpm -q --quiet yum-utils || die "yum-utils not installed"
+		echo "Fedora/Red Hat distribution detected"
+		rpm -q --quiet rpmdevtools || die "rpmdevtools not installed"
 
-		echo "Downloading kernel source for $ARCHVERSION"
-		yumdownloader --source --destdir "$TEMPDIR" "kernel-$ARCHVERSION" >> "$LOGFILE" 2>&1 || die
-		SRCRPM="$TEMPDIR/kernel-${ARCHVERSION%*.*}.src.rpm"
+		if [[ -z "$SRCRPM" ]]; then
+			rpm -q --quiet yum-utils || die "yum-utils not installed"
+
+			echo "Downloading kernel source for $ARCHVERSION"
+			yumdownloader --source --destdir "$TEMPDIR" "kernel-$ARCHVERSION" >> "$LOGFILE" 2>&1 || die
+			SRCRPM="$TEMPDIR/kernel-${ARCHVERSION%*.*}.src.rpm"
+		fi
+
+		echo "Unpacking kernel source"
+		rpmdev-setuptree >> "$LOGFILE" 2>&1 || die
+		rpm -ivh "$SRCRPM" >> "$LOGFILE" 2>&1 || die
+		rpmbuild -bp "--target=$(uname -m)" "$HOME/rpmbuild/SPECS/kernel.spec" >> "$LOGFILE" 2>&1 ||
+			die "rpmbuild -bp failed.  you may need to run 'yum-builddep kernel' first."
+		rm -rf "$CACHEDIR"
+		mkdir -p "$OBJDIR"
+		mv "$HOME"/rpmbuild/BUILD/kernel-*/linux-"$ARCHVERSION" "$SRCDIR" >> "$LOGFILE" 2>&1 || die
+
+		cp "$SRCDIR/.config" "$OBJDIR" || die
+		echo "-${ARCHVERSION##*-}" > "$SRCDIR/localversion" || die
+
+	elif grep -q "Ubuntu" "/etc/issue"; then
+
+		echo "Debian/Ubuntu distribution detected"
+		cd $TEMPDIR
+		echo "Downloading and unpacking kernel source for $ARCHVERSION"
+		apt-get source linux || die "'apt-get source linux' failed. you may need to run 'apt-get install dpkg-dev'"
+		mkdir -p "$OBJDIR"
+		mv linux-${ARCHVERSION%%-*} "$SRCDIR" || die
+		cp "/boot/config-${ARCHVERSION}" "$OBJDIR/.config" || die
+		echo "-${ARCHVERSION#*-}" > "$SRCDIR/localversion" || die
+		# for some reason the Ubuntu kernel versions don't follow the
+		# upstream SUBLEVEL; they are always at SUBLEVEL 0
+		sed -i "s/^SUBLEVEL.*/SUBLEVEL = 0/" "$SRCDIR/Makefile" || die
+
+	else
+		die "Unsupported distribution"
 	fi
-
-	echo "Unpacking kernel source"
-	rpmdev-setuptree >> "$LOGFILE" 2>&1 || die
-	rpm -ivh "$SRCRPM" >> "$LOGFILE" 2>&1 || die
-	rpmbuild -bp "--target=$(uname -m)" "$HOME/rpmbuild/SPECS/kernel.spec" >> "$LOGFILE" 2>&1 ||
-		die "rpmbuild -bp failed.  you may need to run 'yum-builddep kernel' first."
-	rm -rf "$CACHEDIR"
-	mkdir -p "$OBJDIR"
-	mv "$HOME"/rpmbuild/BUILD/kernel-*/linux-"$ARCHVERSION" "$SRCDIR" >> "$LOGFILE" 2>&1 || die
-
-	cp "$SRCDIR/.config" "$OBJDIR" || die
-	echo "-${ARCHVERSION##*-}" > "$SRCDIR/localversion" || die
 fi
 
 echo "Testing patch file"