1 files changed, 26 insertions, 3 deletions

diff --git a/kernel/panic.c b/kernel/panic.c
index da4d6bac270e..d9e90cfe3298 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -20,6 +20,7 @@
 #include <linux/kexec.h>
 #include <linux/debug_locks.h>
 #include <linux/random.h>
+#include <linux/kallsyms.h>
 
 int panic_on_oops;
 int tainted;
@@ -280,6 +281,13 @@ static int init_oops_id(void)
 }
 late_initcall(init_oops_id);
 
+static void print_oops_end_marker(void)
+{
+        init_oops_id();
+        printk(KERN_WARNING "---[ end trace %016llx ]---\n",
+                (unsigned long long)oops_id);
+}
+
 /*
  * Called when the architecture exits its oops handler, after printing
  * everything.
@@ -287,11 +295,26 @@ late_initcall(init_oops_id);
 void oops_exit(void)
 {
         do_oops_enter_exit();
-        init_oops_id();
-        printk(KERN_WARNING "---[ end trace %016llx ]---\n",
-                (unsigned long long)oops_id);
+        print_oops_end_marker();
 }
 
+#ifdef WANT_WARN_ON_SLOWPATH
+void warn_on_slowpath(const char *file, int line)
+{
+        char function[KSYM_SYMBOL_LEN];
+        unsigned long caller = (unsigned long) __builtin_return_address(0);
+        sprint_symbol(function, caller);
+
+        printk(KERN_WARNING "------------[ cut here ]------------\n");
+        printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file,
+                line, function);
+        print_modules();
+        dump_stack();
+        print_oops_end_marker();
+}
+EXPORT_SYMBOL(warn_on_slowpath);
+#endif
+
 #ifdef CONFIG_CC_STACKPROTECTOR
 /*
  * Called when gcc's -fstack-protector feature is used, and