Introduced by 8adb711f3668b034e7b956fac951ed08b53e0d55 ("debugfs: introduce stub for debugfs_create_size_t() when DEBUG_FS=n") and due to a simple missing "static inline". Reported-and-tested-by: Jeff Chua <jeff.chua.linux@gmail.com> Acked-by: Greg KH <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>