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Subject[patch 06/61] lock validator: add __module_address() method
From: Ingo Molnar <mingo@elte.hu>

add __module_address() method - to be used by lockdep.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
---
include/linux/module.h | 6 ++++++
kernel/module.c | 14 ++++++++++++++
2 files changed, 20 insertions(+)

Index: linux/include/linux/module.h
===================================================================
--- linux.orig/include/linux/module.h
+++ linux/include/linux/module.h
@@ -371,6 +371,7 @@ static inline int module_is_live(struct
/* 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 __module_address(unsigned long addr);

/* Returns module and fills in value, defined and namebuf, or NULL if
symnum out of range. */
@@ -509,6 +510,11 @@ static inline struct module *__module_te
return NULL;
}

+static inline int __module_address(unsigned long addr)
+{
+ return 0;
+}
+
/* 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)
Index: linux/kernel/module.c
===================================================================
--- linux.orig/kernel/module.c
+++ linux/kernel/module.c
@@ -2222,6 +2222,20 @@ const struct exception_table_entry *sear
return e;
}

+/*
+ * Is this a valid module address? We don't grab the lock.
+ */
+int __module_address(unsigned long addr)
+{
+ struct module *mod;
+
+ list_for_each_entry(mod, &modules, list)
+ if (within(addr, mod->module_core, mod->core_size))
+ return 1;
+ return 0;
+}
+
+
/* Is this a valid kernel address? We don't grab the lock: we are oopsing. */
struct module *__module_text_address(unsigned long addr)
{
-
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