>
> Commit b46e756f5e47 ("thp: extract khugepaged from mm/huge_memory.c")
> moved code from huge_memory.c to khugepaged.c. Some of this code should
> be compiled only when CONFIG_SYSFS is enabled but the condition around
> this code was not moved into khugepaged.c. The result is a compilation
> error when CONFIG_SYSFS is disabled:
>
> mm/built-in.o: In function `khugepaged_defrag_store':
> khugepaged.c:(.text+0x2d095): undefined reference to
> `single_hugepage_flag_store'
> mm/built-in.o: In function `khugepaged_defrag_show':
> khugepaged.c:(.text+0x2d0ab): undefined reference to
> `single_hugepage_flag_show'
>
> This commit adds the #ifdef CONFIG_SYSFS around the code related to
> sysfs.
>
> Signed-off-by: Jérémy Lefaure <jeremy.lefaure@xxxxxxxxxxxx>
Acked-by: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx>
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