Provide stubs for within_module_core(), within_module_init(), and
within_module() to prevent build errors when !CONFIG_MODULES.
v2:
- Generalized commit message, as per Jessica.
- Stubs for within_module_core() and within_module_init(), as per Nick.
Suggested-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Link: https://marc.info/?l=linux-mm&m=155384681109231&w=2
Signed-off-by: Tri Vo <trong@xxxxxxxxxxx>