我想从linux内核开源中单独构建一个linux内核模块。内核模块警告
源文件是mm/ksm.c。下面发生
make -C /usr/src/linux-headers-3.16.0-30-generic/ M=/home/wei/module modules
make[1]: Entering directory `/usr/src/linux-headers-3.16.0-30-generic'
CC [M] /home/wei/module/ksm.o
Building modules, stage 2.
MODPOST 1 modules
WARNING: "munlock_vma_page" [/home/wei/module/ksm.ko] undefined!
WARNING: "follow_page_mask" [/home/wei/module/ksm.ko] undefined!
WARNING: "page_remove_rmap" [/home/wei/module/ksm.ko] undefined!
WARNING: "mm_find_pmd" [/home/wei/module/ksm.ko] undefined!
WARNING: "__page_check_address" [/home/wei/module/ksm.ko] undefined!
WARNING: "anon_vma_interval_tree_iter_next" [/home/wei/module/ksm.ko] undefined!
WARNING: "__mmu_notifier_change_pte" [/home/wei/module/ksm.ko] undefined!
WARNING: "ptep_clear_flush" [/home/wei/module/ksm.ko] undefined!
WARNING: "page_address_in_vma" [/home/wei/module/ksm.ko] undefined!
WARNING: "alloc_pages_vma" [/home/wei/module/ksm.ko] undefined!
WARNING: "page_add_anon_rmap" [/home/wei/module/ksm.ko] undefined!
WARNING: "try_to_free_swap" [/home/wei/module/ksm.ko] undefined!
WARNING: "lru_add_drain_all" [/home/wei/module/ksm.ko] undefined!
WARNING: "linear_hugepage_index" [/home/wei/module/ksm.ko] undefined!
WARNING: "anon_vma_interval_tree_iter_first" [/home/wei/module/ksm.ko] undefined!
WARNING: "split_huge_page_to_list" [/home/wei/module/ksm.ko] undefined!
WARNING: "handle_mm_fault" [/home/wei/module/ksm.ko] undefined!
WARNING: "mlock_vma_page" [/home/wei/module/ksm.ko] undefined!
WARNING: "__put_anon_vma" [/home/wei/module/ksm.ko] undefined!
CC /home/wei/module/ksm.mod.o
LD [M] /home/wei/module/ksm.ko
make[1]: Leaving directory `/usr/src/linux-headers-3.16.0-30-generic'
但问题我解决不了,甚至我在每个头文件中插入EXPORT_SYMBOL(fun);
。
如何解决此警告?
这些符号**不会从内核核心**中导出。您无法使用修改头文件的模块访问它们 - 您需要修改内核源代码并重新编译内核。通常,如果你想使用许多非导出的符号,你最好直接将**添加到内核本身(通过修改它的源代码并重新编译它)而不是创建外部模块。 – Tsyvarev
感谢您的建议:) – wayne