The Kernel Source Tree


The kernel source tree is divided into a number of directories, most of which contain many more subdirectories.The directories in the root of the source tree, along with their descriptions.





Directory                                                  Description


arch                                                      Architecture-specific source
block                                                    Block I/O layer
crypto                                                  Crypto API
Documentation                                   Kernel source documentation
drivers                                                 Device drivers
firmware                                              Device firmware needed to use             
                                                             certain drivers
fs                                                          The VFS and the individual filesystems
include                                                 Kernel headers
init                                                        Kernel boot and initialization
ipc                                                        Interprocess communication code
kernel                                                  Core subsystems, such as the scheduler
lib                                                         Helper routines
mm                                                       Memory management subsystem and
                                                              the VM
net                                                       Networking subsystem
samples                                               Sample, demonstrative code
scripts                                                 Scripts used to build the kernel
security                                               Linux Security Module
sound                                                  Sound subsystem
usr                                                       Early user-space code (called initramfs)
tools                                                    Tools helpful for developing Linux
virt                                                       Virtualization infrastructure



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