我正在尝试编译一个简单的hello world内核模块但是在make命令之后，我收到了下面的警告，并且没有生成moduleName.ko文件。这个问题的原因是什么？警告阻止生成.ko文件？我怎么解决这个问题？感谢。
make命令后的输出：
make -C /lib/modules/2.6.20.15-custom/build SUBDIRS= modules
make[1]: Entering directory `/usr/src/linux-2.6.20.15'
CHK include/linux/version.h
CHK include/linux/utsrelease.h
Building modules, stage 2.
MODPOST 1595 modules
WARNING: vmlinux - Section mismatch: reference to .init.data:boot_params from .text be tween '_text' (at offset 0xc0100036) and 'startup_32_smp'
WARNING: vmlinux - Section mismatch: reference to .init.data:boot_params from .text between '_text' (at offset 0xc0100044) and 'startup_32_smp'
WARNING: vmlinux - Section mismatch: reference to .init.data:init_pg_tables_end from .text between '_text' (at offset 0xc01000a6) and 'startup_32_smp'
WARNING: vmlinux - Section mismatch: reference to .init.text:start_kernel from .text between 'is386' (at offset 0xc0100221) and 'check_x87'
WARNING: vmlinux - Section mismatch: reference to .init.text:smp_prepare_cpus from .text between 'init' (at offset 0xc0100438) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:migration_init from .text between 'init' (at offset 0xc010043d) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:spawn_ksoftirqd from .text between 'init' (at offset 0xc0100442) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:spawn_softlockup_task from .text between 'init' (at offset 0xc0100447) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:smp_cpus_done from .text between 'init' (at offset 0xc01004bf) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:sched_init_smp from .text between 'init' (at offset 0xc01004c4) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:cpuset_init_smp from .text between 'init' (at offset 0xc01004c9) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:usermodehelper_init from .text between 'init' (at offset 0xc01004d6) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:driver_init from .text between 'init' (at offset 0xc01004db) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:sysctl_init from .text between 'init' (at offset 0xc01004e1) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between 'init' (at offset 0xc0100507) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between 'init' (at offset 0xc0100524) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:prepare_namespace from .text between 'init' (at offset 0xc010070f) and 'rest_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:__alloc_bootmem from .text between 'init_gdt' (at offset 0xc010a1fb) and 'cpu_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:__alloc_bootmem from .text between 'init_gdt' (at offset 0xc010a211) and 'cpu_init'
WARNING: vmlinux - Section mismatch: reference to .init.text:sysenter_setup from .text between 'identify_cpu' (at offset 0xc010a8de) and 'display_cacheinfo'
WARNING: vmlinux - Section mismatch: reference to .init.text:mtrr_bp_init from .text between 'identify_cpu' (at offset 0xc010a8e8) and 'display_cacheinfo'
WARNING: vmlinux - Section mismatch: reference to .init.text:trap_init_f00f_bug from .text between 'init_intel' (at offset 0xc010c7f5) and 'cpuid4_cache_lookup'
WARNING: vmlinux - Section mismatch: reference to .init.data:initkmem_list3 from .text between 'set_up_list3s' (at offset 0xc0170e0f) and 's_start'
WARNING: vmlinux - Section mismatch: reference to .init.text:eisa_root_register from .text between 'pci_eisa_init' (at offset 0xc0263ebb) and 'virtual_eisa_release'
WARNING: vmlinux - Section mismatch: reference to .init.text:eisa_root_register from .text between 'virtual_eisa_root_init' (at offset 0xc0263f1f) and 'cpufreq_unregister_driver'
WARNING: vmlinux - Section mismatch: reference to .init.text: from .text between 'iret_exc' (at offset 0xc02e8dbb) and '_etext'
WARNING: vmlinux - Section mismatch: reference to .init.text:start_kernel from .paravirtprobe between '__start_paravirtprobe' (at offset 0xc03b34b0) and '__stop_paravirtprobe'
make[1]: Leaving directory `/usr/src/linux-2.6.20.15'
答案 0 :(得分：2)
使用make -C /lib/modules/2.6.20.15-custom/build M=$$PWD（$$PWD，也不需要modules。
答案 1 :(得分：0)
我认为命令中缺少变量 M - 它应该指向模块源代码所在的路径：
make -C path-to-linux-src M=path-to-module-src modules