locking/atomic, arch/arc: Fix build

Resolve conflict between commits:

  fbffe89 ("locking/atomic, arch/arc: Implement atomic_fetch_{add,sub,and,andnot,or,xor}()")

and:

  ed6aefe ("Revert "ARCv2: spinlock/rwlock/atomics: Delayed retry of failed SCOND with exponential backoff"")

Reported-by: Guenter Roeck <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Nigel Topham <[email protected]>
Cc: Noam Camus <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Ingo Molnar <[email protected]>

arch/arc/include/asm/atomic.h

@@ -71,7 +71,6 @@ static inline int atomic_##op##_return(int i, atomic_t *v)		\
 static inline int atomic_fetch_##op(int i, atomic_t *v)			\
 {									\
 	unsigned int val, orig;						\
-	SCOND_FAIL_RETRY_VAR_DEF                                        \
 									\
 	/*								\
 	 * Explicit full memory barrier needed before/after as		\
@@ -84,11 +83,8 @@ static inline int atomic_fetch_##op(int i, atomic_t *v)			\
 	"	" #asm_op " %[val], %[orig], %[i]	\n"		\
 	"	scond   %[val], [%[ctr]]		\n"		\
 	"						\n"		\
-	SCOND_FAIL_RETRY_ASM						\
-									\
 	: [val]	"=&r"	(val),						\
 	  [orig] "=&r" (orig)						\
-	  SCOND_FAIL_RETRY_VARS						\
 	: [ctr]	"r"	(&v->counter),					\
 	  [i]	"ir"	(i)						\
 	: "cc");							\
@@ -199,10 +195,6 @@ ATOMIC_OPS(andnot, &= ~, bic)
 ATOMIC_OPS(or, |=, or)
 ATOMIC_OPS(xor, ^=, xor)
 
-#undef SCOND_FAIL_RETRY_VAR_DEF
-#undef SCOND_FAIL_RETRY_ASM
-#undef SCOND_FAIL_RETRY_VARS
-
 #else /* CONFIG_ARC_PLAT_EZNPS */
 
 static inline int atomic_read(const atomic_t *v)