module: __module_address

Impact: New API, cleanup

ksplice wants to know the bounds of a module, not just the module text.

It makes sense to have __module_address.  We then implement
is_module_address and __module_text_address in terms of this (and
change is_module_text_address() to bool while we're at it).

Also, add proper kerneldoc for them all.

Cc: Anders Kaseorg <andersk@mit.edu>
Cc: Jeff Arnold <jbarnold@mit.edu>
Cc: Tim Abbott <tabbott@mit.edu>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 15 insertions, 5 deletions

diff --git a/include/linux/module.h b/include/linux/module.h
index 08e5e75d612..fd1241e1416 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -365,7 +365,9 @@ static inline int module_is_live(struct module *mod)
 /* Is this address in a module? (second is with no locks, for oops) */
 struct module *module_text_address(unsigned long addr);
 struct module *__module_text_address(unsigned long addr);
-int is_module_address(unsigned long addr);
+struct module *__module_address(unsigned long addr);
+bool is_module_address(unsigned long addr);
+bool is_module_text_address(unsigned long addr);
 
 static inline int within_module_core(unsigned long addr, struct module *mod)
 {
@@ -494,21 +496,29 @@ search_module_extables(unsigned long addr)
 	return NULL;
 }
 
-/* Is this address in a module? */
 static inline struct module *module_text_address(unsigned long addr)
 {
 	return NULL;
 }
 
-/* Is this address in a module? (don't take a lock, we're oopsing) */
+static inline struct module *__module_address(unsigned long addr)
+{
+	return NULL;
+}
+
 static inline struct module *__module_text_address(unsigned long addr)
 {
 	return NULL;
 }
 
-static inline int is_module_address(unsigned long addr)
+static inline bool is_module_address(unsigned long addr)
 {
-	return 0;
+	return false;
+}
+
+static inline bool is_module_text_address(unsigned long addr)
+{
+	return false;
 }
 
 /* Get/put a kernel symbol (calls should be symmetric) */