[PATCH v2] module: add stubs for within_module functions

[Tri Vo <trong@android.com>]

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@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>
---
 include/linux/module.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/linux/module.h b/include/linux/module.h
index 5bf5dcd91009..35d83765bfbd 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -709,6 +709,23 @@ static inline bool is_module_text_address(unsigned long addr)
 	return false;
 }
 
+static inline bool within_module_core(unsigned long addr,
+				      const struct module *mod)
+{
+	return false;
+}
+
+static inline bool within_module_init(unsigned long addr,
+				      const struct module *mod)
+{
+	return false;
+}
+
+static inline bool within_module(unsigned long addr, const struct module *mod)
+{
+	return false;
+}
+
 /* Get/put a kernel symbol (calls should be symmetric) */
 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
 #define symbol_put(x) do { } while (0)
-- 
2.21.0.392.gf8f6787159e-goog