debug warnings: consolidate warn_slowpath and warn_on_slowpath

Impact: cleanup, code reduction

warn_slowpath is a superset of warn_on_slowpath; just have
warn_on_slowpath call warn_slowpath with a NULL 3rd argument.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 12 insertions, 20 deletions

diff --git a/kernel/panic.c b/kernel/panic.c
index 6513aac8e992..6bbf7b905c76 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -320,23 +320,6 @@ void oops_exit(void)
 }
 
 #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();
-        add_taint(TAINT_WARN);
-}
-EXPORT_SYMBOL(warn_on_slowpath);
-
-
 void warn_slowpath(const char *file, int line, const char *fmt, ...)
 {
         va_list args;
@@ -347,9 +330,12 @@ void warn_slowpath(const char *file, int line, const char *fmt, ...)
         printk(KERN_WARNING "------------[ cut here ]------------\n");
         printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file,
                 line, function);
-        va_start(args, fmt);
-        vprintk(fmt, args);
-        va_end(args);
+
+        if (fmt) {
+                va_start(args, fmt);
+                vprintk(fmt, args);
+                va_end(args);
+        }
 
         print_modules();
         dump_stack();
@@ -357,6 +343,12 @@ void warn_slowpath(const char *file, int line, const char *fmt, ...)
         add_taint(TAINT_WARN);
 }
 EXPORT_SYMBOL(warn_slowpath);
+
+void warn_on_slowpath(const char *file, int line)
+{
+        warn_slowpath(file, line, NULL);
+}
+EXPORT_SYMBOL(warn_on_slowpath);
 #endif
 
 #ifdef CONFIG_CC_STACKPROTECTOR