Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-module-and-param

[karo-tx-linux.git] / kernel / extable.c

diff --git a/kernel/extable.c b/kernel/extable.c
index adf0cc9c02d6873d50c48edf4c34b44a32bf48b9..81e99d1f0d5be93476ff27761d0a44232463dc9f 100644 (file)
--- a/kernel/extable.c
+++ b/kernel/extable.c
@@ -17,6 +17,7 @@
 */
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/ftrace.h>
 #include <asm/uaccess.h>
 #include <asm/sections.h>
 
@@ -40,31 +41,50 @@ const struct exception_table_entry *search_exception_tables(unsigned long addr)
        return e;
 }
 
-int core_kernel_text(unsigned long addr)
+static inline int init_kernel_text(unsigned long addr)
+{
+       if (addr >= (unsigned long)_sinittext &&
+           addr <= (unsigned long)_einittext)
+               return 1;
+       return 0;
+}
+
+__notrace_funcgraph int core_kernel_text(unsigned long addr)
 {
        if (addr >= (unsigned long)_stext &&
            addr <= (unsigned long)_etext)
                return 1;
 
        if (system_state == SYSTEM_BOOTING &&
-           addr >= (unsigned long)_sinittext &&
-           addr <= (unsigned long)_einittext)
+           init_kernel_text(addr))
                return 1;
        return 0;
 }
 
-int __kernel_text_address(unsigned long addr)
+__notrace_funcgraph int __kernel_text_address(unsigned long addr)
 {
        if (core_kernel_text(addr))
                return 1;
-       return __module_text_address(addr) != NULL;
+       if (is_module_text_address(addr))
+               return 1;
+       /*
+        * There might be init symbols in saved stacktraces.
+        * Give those symbols a chance to be printed in
+        * backtraces (such as lockdep traces).
+        *
+        * Since we are after the module-symbols check, there's
+        * no danger of address overlap:
+        */
+       if (init_kernel_text(addr))
+               return 1;
+       return 0;
 }
 
 int kernel_text_address(unsigned long addr)
 {
        if (core_kernel_text(addr))
                return 1;
-       return module_text_address(addr) != NULL;
+       return is_module_text_address(addr);
 }
 
 /*
@@ -80,5 +100,5 @@ int func_ptr_is_kernel_text(void *ptr)
        addr = (unsigned long) dereference_function_descriptor(ptr);
        if (core_kernel_text(addr))
                return 1;
-       return module_text_address(addr) != NULL;
+       return is_module_text_address(addr);
 }