How to bump kernel version
==========================

Parameters:
-----------
* ltsi tag to upgrade to (example: v3.14.28-ltsi)

Define variables:

# ltsi_tag=v3.14.28-ltsi


1. Clone linux-stable from tizen.org
------------------------------------

# git clone review.tizen.org:platform/kernel/linux-stable
# cd linux-stable


2. add kernel.org and LTSI as new remotes and fetch them
------------------------------------------------------

# git remote add kernel_org git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
# git fetch kernel_org

# git remote add kernel_ltsi http://git.linuxfoundation.org/ltsi-kernel.git
# git fetch kernel_ltsi

3. Update LTSI branch
---------------------

# git checkout -B upstream_ltsi ${ltsi_tag}
# git push --tags origin HEAD:upstream_ltsi


3. import upstream branch, apply LTSI patches and push to tizen.org
-------------------------------------------------------------------

# tmpdir=/tmp/ltsi ; rm -rf $tmpdir && mkdir -p $tmpdir
# git archive ${ltsi_tag} | tar Cxvf $tmpdir -

# linux_tag=v$(<$tmpdir/KERNEL_VERSION)
# linux_branch=linux-$(sed -r 's/v([0-9]+)\.([0-9]+)\.([0-9]+)$/\1.\2/' <<<$linux_tag).y
# echo $linux_branch $linux_tag

# git checkout -B ${linux_branch} ${linux_tag}
# git push --tags origin HEAD:${linux_branch}

# $tmpdir/scripts/generate_git
# git tag ${linux_tag}+ltsi
# git push --tags origin HEAD:upstream

Optional: delete local branch created by generate_git 
# git checkout -B upstream origin/upstream
# git branch -D ${ltsi_tag/#v/}

4. rebase tizen branch
----------------------

# git checkout -B tizen origin/tizen
# git rebase -i ${linux_tag}+ltsi


5. Bump the kernel version in the spec file
-------------------------------------------

# sed -ri "s/^(%define upstream_version).*$/\1 $(make kernelversion | sed 's/-ltsi$/+ltsi/')/" packaging/*.spec
# git commit -sam "packaging: bump to $(make kernelversion)"


6. Push the tizen branch
------------------------

# git push origin +HEAD:tizen


7. Updating kernel configurations (optional)
--------------------------------------------

# function adjustconfig() {
   arch=$1

   case $arch in 
      i386|i486|i586|i686|x86)
         cfgpath=arch/x86/configs
         arch=i386
         platform=i386
         ;;
      x86_64)
         cfgpath=arch/x86/configs
         arch=x86_64
         platform=x86_64
         ;;
      arm|vexpress)
         cfgpath=arch/arm/configs
         arch=arm
         platform=vexpress
         ;;
      *)
         echo "Unknown arch"
         return 1
         ;;
   esac

   rm -f .config
   make ARCH=$arch ${platform}_defconfig || return $?
   make ARCH=$arch menuconfig || return $?
   make ARCH=$arch savedefconfig || return $?
   mv -v defconfig $cfgpath/${platform}_defconfig
}

# adjustconfig x86
# adjustconfig x86_64
# adjustconfig arm