Linux Kernel Source Code Modification and Re-compile

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http://stackoverflow.com – I'm modifiying the kernel source code (/linux/net/mac80211/mesh_hwmp.c) to add some signature authentication to the routing frames. After modifying the source code, do I have to build and install the kernel again for the changes to take effect? Following are the steps I followed: Downloaded the kernel from git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git After downloading, copied the current config from the / boot directory in wireless-testing $ cp /boot/config- `uname-r` ./.config Ran make menuconfig and selected the following features: Networking -> Wireless -> (HowTos)