--- zzzz-none-000/linux-3.10.107/arch/x86/include/asm/mutex_64.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/x86/include/asm/mutex_64.h	2021-02-04 17:41:59.000000000 +0000
@@ -16,6 +16,20 @@
  *
  * Atomically decrements @v and calls <fail_fn> if the result is negative.
  */
+#ifdef CC_HAVE_ASM_GOTO
+static inline void __mutex_fastpath_lock(atomic_t *v,
+					 void (*fail_fn)(atomic_t *))
+{
+	asm_volatile_goto(LOCK_PREFIX "   decl %0\n"
+			  "   jns %l[exit]\n"
+			  : : "m" (v->counter)
+			  : "memory", "cc"
+			  : exit);
+	fail_fn(v);
+exit:
+	return;
+}
+#else
 #define __mutex_fastpath_lock(v, fail_fn)			\
 do {								\
 	unsigned long dummy;					\
@@ -32,22 +46,20 @@
 		     : "rax", "rsi", "rdx", "rcx",		\
 		       "r8", "r9", "r10", "r11", "memory");	\
 } while (0)
+#endif
 
 /**
  *  __mutex_fastpath_lock_retval - try to take the lock by moving the count
  *                                 from 1 to a 0 value
  *  @count: pointer of type atomic_t
- *  @fail_fn: function to call if the original value was not 1
  *
- * Change the count from 1 to a value lower than 1, and call <fail_fn> if
- * it wasn't 1 originally. This function returns 0 if the fastpath succeeds,
- * or anything the slow path function returns
+ * Change the count from 1 to a value lower than 1. This function returns 0
+ * if the fastpath succeeds, or -1 otherwise.
  */
-static inline int __mutex_fastpath_lock_retval(atomic_t *count,
-					       int (*fail_fn)(atomic_t *))
+static inline int __mutex_fastpath_lock_retval(atomic_t *count)
 {
 	if (unlikely(atomic_dec_return(count) < 0))
-		return fail_fn(count);
+		return -1;
 	else
 		return 0;
 }
@@ -59,6 +71,20 @@
  *
  * Atomically increments @v and calls <fail_fn> if the result is nonpositive.
  */
+#ifdef CC_HAVE_ASM_GOTO
+static inline void __mutex_fastpath_unlock(atomic_t *v,
+					   void (*fail_fn)(atomic_t *))
+{
+	asm_volatile_goto(LOCK_PREFIX "   incl %0\n"
+			  "   jg %l[exit]\n"
+			  : : "m" (v->counter)
+			  : "memory", "cc"
+			  : exit);
+	fail_fn(v);
+exit:
+	return;
+}
+#else
 #define __mutex_fastpath_unlock(v, fail_fn)			\
 do {								\
 	unsigned long dummy;					\
@@ -75,6 +101,7 @@
 		     : "rax", "rsi", "rdx", "rcx",		\
 		       "r8", "r9", "r10", "r11", "memory");	\
 } while (0)
+#endif
 
 #define __mutex_slowpath_needs_to_unlock()	1