Merge branch 'sched/clock' into tracing/ftrace

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

diff --git a/kernel/extable.c b/kernel/extable.c
index feb0317cf09ab5960d0288a31ec00d03ae5a6335..0df6253730bedff8ab66a0aa8dfbe9968db0b564 100644 (file)
--- a/kernel/extable.c
+++ b/kernel/extable.c
@@ -41,7 +41,7 @@ const struct exception_table_entry *search_exception_tables(unsigned long addr)
        return e;
 }
 
-__notrace_funcgraph int core_kernel_text(unsigned long addr)
+int core_kernel_text(unsigned long addr)
 {
        if (addr >= (unsigned long)_stext &&
            addr <= (unsigned long)_etext)
@@ -54,7 +54,7 @@ __notrace_funcgraph int core_kernel_text(unsigned long addr)
        return 0;
 }
 
-__notrace_funcgraph int __kernel_text_address(unsigned long addr)
+int __kernel_text_address(unsigned long addr)
 {
        if (core_kernel_text(addr))
                return 1;
@@ -67,3 +67,19 @@ int kernel_text_address(unsigned long addr)
                return 1;
        return module_text_address(addr) != NULL;
 }
+
+/*
+ * On some architectures (PPC64, IA64) function pointers
+ * are actually only tokens to some data that then holds the
+ * real function address. As a result, to find if a function
+ * pointer is part of the kernel text, we need to do some
+ * special dereferencing first.
+ */
+int func_ptr_is_kernel_text(void *ptr)
+{
+       unsigned long addr;
+       addr = (unsigned long) dereference_function_descriptor(ptr);
+       if (core_kernel_text(addr))
+               return 1;
+       return module_text_address(addr) != NULL;
+}