Provide stubs for within_module_core(), within_module_init(), and within_module() to prevent build errors when !CONFIG_MODULES. Suggested-by: Matthew Wilcox <willy@infradead.org> Reported-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> Link: https://marc.info/?l=linux-mm&m=155384681109231&w=2 Signed-off-by: Tri Vo <trong@android.com> Signed-off-by: Jessica Yu <jeyu@kernel.org> (cherry picked from commit dadec066d8fa7da227f623f632ea114690fecaf8) Bug: 132997968 Test: defconfig + CONFIG_GCOV_KERNEL records coverage Change-Id: I69448d0721a5174d4f39fff0774a86361f37b8ef