On 2021/5/31 10:02, Matthew Wilcox wrote:

quoted

Fix the warning: [-Wunused-function]
mm/mmap_lock.c:157:20: warning: ‘get_mm_memcg_path’ defined but not used
 static const char *get_mm_memcg_path(struct mm_struct *mm)
                    ^~~~~~~~~~~~~~~~~

That seems like the wrong way to fix the warning.  Why not put it
under an appropriate ifdef?

It's better than me, I will send a new patch.

Thanks
Bixuan Cui