Linux kernel source code, developers have great reference value.

linux-2.4.20
............\arch
............\....\alpha
............\....\.....\boot
............\....\.....\....\bootloader.lds
............\....\.....\....\bootp.c
............\....\.....\....\head.S
............\....\.....\....\main.c
............\....\.....\....\Makefile
............\....\.....\....\tools
............\....\.....\....\.....\mkbb.c
............\....\.....\....\.....\objstrip.c
............\....\.....\config.in
............\....\.....\defconfig
............\....\.....\kernel
............\....\.....\......\alpha_ksyms.c
............\....\.....\......\check_asm.c
............\....\.....\......\console.c
............\....\.....\......\core_apecs.c
............\....\.....\......\core_cia.c
............\....\.....\......\core_irongate.c
............\....\.....\......\core_lca.c
............\....\.....\......\core_mcpcia.c
............\....\.....\......\core_polaris.c
............\....\.....\......\core_t2.c
............\....\.....\......\core_titan.c
............\....\.....\......\core_tsunami.c
............\....\.....\......\core_wildfire.c
............\....\.....\......\entry.S
............\....\.....\......\es1888.c
............\....\.....\......\head.S
............\....\.....\......\irq.c
............\....\.....\......\irq_alpha.c
............\....\.....\......\irq_i8259.c
............\....\.....\......\irq_impl.h
............\....\.....\......\irq_pyxis.c
............\....\.....\......\irq_smp.c
............\....\.....\......\irq_srm.c
............\....\.....\......\machvec_impl.h
............\....\.....\......\Makefile
............\....\.....\......\ns87312.c
............\....\.....\......\osf_sys.c
............\....\.....\......\pci-noop.c
............\....\.....\......\pci.c
............\....\.....\......\pci_impl.h
............\....\.....\......\pci_iommu.c
............\....\.....\......\process.c
............\....\.....\......\proto.h
............\....\.....\......\ptrace.c
............\....\.....\......\semaphore.c
............\....\.....\......\setup.c
............\....\.....\......\signal.c
............\....\.....\......\smc37c669.c
............\....\.....\......\smc37c93x.c
............\....\.....\......\smp.c
............\....\.....\......\srm_env.c
............\....\.....\......\sys_alcor.c
............\....\.....\......\sys_cabriolet.c
............\....\.....\......\sys_dp264.c
............\....\.....\......\sys_eb64p.c
............\....\.....\......\sys_eiger.c
............\....\.....\......\sys_jensen.c
............\....\.....\......\sys_miata.c
............\....\.....\......\sys_mikasa.c
............\....\.....\......\sys_nautilus.c
............\....\.....\......\sys_noritake.c
............\....\.....\......\sys_rawhide.c
............\....\.....\......\sys_ruffian.c
............\....\.....\......\sys_rx164.c
............\....\.....\......\sys_sable.c
............\....\.....\......\sys_sio.c
............\....\.....\......\sys_sx164.c
............\....\.....\......\sys_takara.c
............\....\.....\......\sys_titan.c
............\....\.....\......\sys_wildfire.c
............\....\.....\......\time.c
............\....\.....\......\traps.c
............\....\.....\lib
............\....\.....\...\callback_srm.S
............\....\.....\...\checksum.c
............\....\.....\...\clear_page.S
............\....\.....\...\clear_user.S
............\....\.....\...\copy_page.S
............\....\.....\...\copy_user.S
............\....\.....\...\csum_ipv6_magic.S
............\....\.....\...\csum_partial_copy.c
............\....\.....\...\dec_and_lock.c
............\....\.....\...\divide.S
............\....\.....\...\ev6-clear_page.S
............\....\.....\...\ev6-clear_user.S
............\....\.....\...\ev6-copy_page.S
............\....\.....\...\ev6-copy_user.S
............\....\.....\...\ev6-csum_ipv6_magic.S
............\....\.....\...\ev6-divide.S
............\....\.....\...\ev6-memchr.S
............\....\.....\...\ev6-memcpy.S
............\....\.....\...\ev6-memset.S
............\....\.....\...\ev6-strncpy_from_user.S
............\....\.....\...\ev6-stxcpy.S
............\....\.....\...\ev6-stxncp

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