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kernel-dev, ref-manual: Edits to KBRANCH.

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Applied some edits to the areas where KBRANCH is discussed.
Clarified that setting it is not optional any longer.

(From yocto-docs rev: 4d0b2d92140d066048d9ff36453c7ea589eebe55)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Scott Rifenbark
2015-03-02 11:10:19 -08:00
committed by Richard Purdie
parent 8ced82e8b2
commit a8f21965eb
2 changed files with 19 additions and 14 deletions
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28
documentation/kernel-dev/kernel-dev-advanced.xml
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@@ -24,9 +24,9 @@
<title>Using Kernel Metadata in a Recipe</title>
<para>
The kernel sources in the Yocto Project contain kernel Metadata, which is
located in the <filename>meta</filename> branches of the kernel source
Git repositories.
The kernel sources in the Yocto Project contain kernel Metadata, which
is located in the <filename>meta</filename> branches of the kernel
source Git repositories.
This Metadata defines Board Support Packages (BSPs) that
correspond to definitions in linux-yocto recipes for the same BSPs.
A BSP consists of an aggregation of kernel policy and hardware-specific
@@ -60,21 +60,27 @@
for more information.
</para>
<para>
Every linux-yocto style recipe must also indicate the Linux kernel
source repository branch used to build the Linux kernel.
The <ulink url='&YOCTO_DOCS_REF_URL;#var-KBRANCH'>KBRANCH</ulink>
variable must be set to indicate the branch.
<note>
You can use the <filename>KBRANCH</filename> value to define an
alternate branch typically with a machine override as follows:
<literallayout class='monospaced'>
KBRANCH_fri2 ?= "standard/fri2"
</literallayout>
</note>
</para>
<para>
The linux-yocto style recipes can optionally define the following
variables:
<literallayout class='monospaced'>
<ulink url='&YOCTO_DOCS_REF_URL;#var-KBRANCH'>KBRANCH</ulink>
<ulink url='&YOCTO_DOCS_REF_URL;#var-KERNEL_FEATURES'>KERNEL_FEATURES</ulink>
<ulink url='&YOCTO_DOCS_REF_URL;#var-LINUX_KERNEL_TYPE'>LINUX_KERNEL_TYPE</ulink>
</literallayout>
<filename>KBRANCH</filename> defines the Linux kernel source
repository's branch to use to build the Linux kernel.
You can use the value to define an alternate branch typically with a
machine override as follows:
<literallayout class='monospaced'>
KBRANCH_fri2 ?= "standard/fri2"
</literallayout>
</para>
<para>