Hi, I got a trouble while I am developing a patch for EXT4 filesytem. Actually, I used a percpu rw semaphore in my patch and there was no problem when I built EXT4 filesystem as built-in mode. However, when kbuild auto build robot built EXT4 filesystem with my patch as a "module", a bulid error occurred because percpu_free_rwsem() function is not exported.
I noticed that other functions except percpu_free_rwsem() were exported in 2015. Is there any reason for percpu_free_rwsem() not to be exported? If I need the function to be exported, should I do that in my patch? :-) Best Regards,
