buildroot local kernel patch

In 'menuconfig' user can choose a local directory as source of Linux kernel code.
Useful during kernel drivers or modules development.

Tested on three different development machines and different kernel sources.

Signed-off-by: Rafal Fabich 
---
 linux/Config.in |   14 ++++++++++++++
 linux/linux.mk  |    3 +++
 2 files changed, 17 insertions(+)

diff --git a/linux/Config.in b/linux/Config.in
index 3c50acc..d88d920 100644
--- a/linux/Config.in
+++ b/linux/Config.in
     -52,6 +52,11      config BR2_LINUX_KERNEL_CUSTOM_GIT
 	  This option allows Buildroot to get the Linux kernel source
 	  code from a Git repository.

+config BR2_LINUX_KERNEL_CUSTOM_LOCAL
+	bool "Local directory"
+	help
+	  This option allows Buildroot to get the Linux kernel source
+	  code from a local directory.
 endchoice

 config BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE
     -74,6 +79,13      config BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION
 	  Git revision to use in the format used by git rev-parse,
 	  E.G. a sha id, a tag, branch, ..

+config BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH
+	string "Path to the local directory"
+	depends on BR2_LINUX_KERNEL_CUSTOM_LOCAL
+	help
+	  Path to the local directory with the Linux kernel source code.
+
+
 config BR2_LINUX_KERNEL_VERSION
 	string
 	default "3.7.6" if BR2_LINUX_KERNEL_3_7
     -81,6 +93,8      config BR2_LINUX_KERNEL_VERSION
 	default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE if BR2_LINUX_KERNEL_CUSTOM_VERSION
 	default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL
 	default $BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION if BR2_LINUX_KERNEL_CUSTOM_GIT
+	default "local" if BR2_LINUX_KERNEL_CUSTOM_LOCAL
+

 #
 # Patch selection
diff --git a/linux/linux.mk b/linux/linux.mk
index 91a9f50..3f2d460 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
     -15,6 +15,9      LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
 else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
 LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL))
 LINUX_SITE_METHOD = git
+else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_LOCAL),y)
+LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH))
+LINUX_SITE_METHOD = local
 else
 LINUX_SOURCE = linux-$(LINUX_VERSION).tar.bz2
 # In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
-- 
1.7.9.5