diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 2ed7186c81c5..80e61175bf52 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -331,13 +331,9 @@ config ARC_FPU_SAVE_RESTORE
 	  for floating point exceptions and rounding modes. These are
 	  preserved across task context switch when enabled.
 
-config ARC_CANT_LLSC
-	def_bool n
-
 config ARC_HAS_LLSC
 	bool "Insn: LLOCK/SCOND (efficient atomic ops)"
 	default y
-	depends on !ARC_CANT_LLSC
 
 if ISA_ARCV2
 
diff --git a/arch/arc/include/asm/atomic64-arcv2.h b/arch/arc/include/asm/atomic64-arcv2.h
index 73080a664369..1ca4a1047fb3 100644
--- a/arch/arc/include/asm/atomic64-arcv2.h
+++ b/arch/arc/include/asm/atomic64-arcv2.h
@@ -156,6 +156,12 @@ static inline u64 __arch_cmpxchg64_relaxed(volatile void *ptr, u64 old, u64 new)
 }
 #define arch_cmpxchg64_relaxed __arch_cmpxchg64_relaxed
 
+static inline s64 arch_atomic64_cmpxchg_relaxed(atomic64_t *v, s64 old, s64 new)
+{
+	return arch_cmpxchg64_relaxed(&v->counter, old, new);
+}
+#define arch_atomic64_cmpxchg_relaxed arch_atomic64_cmpxchg_relaxed
+
 static inline s64 arch_atomic64_xchg(atomic64_t *ptr, s64 new)
 {
 	s64 prev;
diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h
index 76f43db0890f..66b3743c9400 100644
--- a/arch/arc/include/asm/cmpxchg.h
+++ b/arch/arc/include/asm/cmpxchg.h
@@ -46,7 +46,7 @@
 	__typeof__(*(ptr)) _n_ = (new);					\
 	__typeof__(*(ptr)) _prev_;					\
 									\
-	switch(sizeof((_p_))) {						\
+	switch (sizeof(*(_p_))) {						\
 	case 1:								\
 		_prev_ = (__typeof__(*(ptr)))cmpxchg_emu_u8((volatile u8 *__force)_p_, (uintptr_t)_o_, (uintptr_t)_n_);	\
 		break;							\
@@ -102,7 +102,7 @@
 	__typeof__(ptr) _p_ = (ptr);					\
 	__typeof__(*(ptr)) _val_ = (val);				\
 									\
-	switch(sizeof(*(_p_))) {					\
+	switch (sizeof(*(_p_))) {					\
 	case 4:								\
 		_val_ = __arch_xchg(_p_, _val_);			\
 		break;							\
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 7b6a9beba9db..8bebd0e6fc2f 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -593,6 +593,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 			   cpu_id);
 	} else {
 		freq = clk_get_rate(cpu_clk);
+		clk_put(cpu_clk);
 	}
 	if (freq)
 		seq_printf(m, "CPU speed\t: %lu.%02lu Mhz\n",
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
index 2d99dffed0ce..ee210a94ce45 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -12,7 +12,6 @@
 #include <linux/spinlock.h>
 #include <linux/sched/mm.h>
 #include <linux/interrupt.h>
-#include <linux/profile.h>
 #include <linux/mm.h>
 #include <linux/cpu.h>
 #include <linux/irq.h>