diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index dcaa44e408ace2adc3bdad5c8545ccaf046d55f9..f48ba03e9b5e7dbf440571ebed1f15a11974abac 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -275,7 +275,7 @@
 			cs-gpios = <&creg_gpio 0 GPIO_ACTIVE_LOW>,
 				   <&creg_gpio 1 GPIO_ACTIVE_LOW>;
 
-			spi-flash@0 {
+			flash@0 {
 				compatible = "sst26wf016b", "jedec,spi-nor";
 				reg = <0>;
 				#address-cells = <1>;
diff --git a/arch/arc/include/asm/atomic-llsc.h b/arch/arc/include/asm/atomic-llsc.h
index 088d348781c1c62847ccc389377bbe940f3548db..1b0ffaeee16d0e2efb720a91b8a7b3d0eb7d815a 100644
--- a/arch/arc/include/asm/atomic-llsc.h
+++ b/arch/arc/include/asm/atomic-llsc.h
@@ -5,7 +5,7 @@
 
 #define arch_atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
 
-#define ATOMIC_OP(op, c_op, asm_op)					\
+#define ATOMIC_OP(op, asm_op)					\
 static inline void arch_atomic_##op(int i, atomic_t *v)			\
 {									\
 	unsigned int val;						\
@@ -21,7 +21,7 @@ static inline void arch_atomic_##op(int i, atomic_t *v)			\
 	: "cc");							\
 }									\
 
-#define ATOMIC_OP_RETURN(op, c_op, asm_op)				\
+#define ATOMIC_OP_RETURN(op, asm_op)				\
 static inline int arch_atomic_##op##_return_relaxed(int i, atomic_t *v)	\
 {									\
 	unsigned int val;						\
@@ -42,7 +42,7 @@ static inline int arch_atomic_##op##_return_relaxed(int i, atomic_t *v)	\
 #define arch_atomic_add_return_relaxed		arch_atomic_add_return_relaxed
 #define arch_atomic_sub_return_relaxed		arch_atomic_sub_return_relaxed
 
-#define ATOMIC_FETCH_OP(op, c_op, asm_op)				\
+#define ATOMIC_FETCH_OP(op, asm_op)				\
 static inline int arch_atomic_fetch_##op##_relaxed(int i, atomic_t *v)	\
 {									\
 	unsigned int val, orig;						\
@@ -69,23 +69,23 @@ static inline int arch_atomic_fetch_##op##_relaxed(int i, atomic_t *v)	\
 #define arch_atomic_fetch_or_relaxed		arch_atomic_fetch_or_relaxed
 #define arch_atomic_fetch_xor_relaxed		arch_atomic_fetch_xor_relaxed
 
-#define ATOMIC_OPS(op, c_op, asm_op)					\
-	ATOMIC_OP(op, c_op, asm_op)					\
-	ATOMIC_OP_RETURN(op, c_op, asm_op)				\
-	ATOMIC_FETCH_OP(op, c_op, asm_op)
+#define ATOMIC_OPS(op, asm_op)					\
+	ATOMIC_OP(op, asm_op)					\
+	ATOMIC_OP_RETURN(op, asm_op)				\
+	ATOMIC_FETCH_OP(op, asm_op)
 
-ATOMIC_OPS(add, +=, add)
-ATOMIC_OPS(sub, -=, sub)
+ATOMIC_OPS(add, add)
+ATOMIC_OPS(sub, sub)
 
 #undef ATOMIC_OPS
-#define ATOMIC_OPS(op, c_op, asm_op)					\
-	ATOMIC_OP(op, c_op, asm_op)					\
-	ATOMIC_FETCH_OP(op, c_op, asm_op)
+#define ATOMIC_OPS(op, asm_op)					\
+	ATOMIC_OP(op, asm_op)					\
+	ATOMIC_FETCH_OP(op, asm_op)
 
-ATOMIC_OPS(and, &=, and)
-ATOMIC_OPS(andnot, &= ~, bic)
-ATOMIC_OPS(or, |=, or)
-ATOMIC_OPS(xor, ^=, xor)
+ATOMIC_OPS(and, and)
+ATOMIC_OPS(andnot, bic)
+ATOMIC_OPS(or, or)
+ATOMIC_OPS(xor, xor)
 
 #define arch_atomic_andnot		arch_atomic_andnot
 
diff --git a/arch/arc/include/asm/pgtable-levels.h b/arch/arc/include/asm/pgtable-levels.h
index 7848348719b26fbbc90b61cff8cf3b1a99ebe6cf..64ca25d199beaa28b91be8ab17f74b953ac7004f 100644
--- a/arch/arc/include/asm/pgtable-levels.h
+++ b/arch/arc/include/asm/pgtable-levels.h
@@ -98,9 +98,6 @@
 /*
  * 1st level paging: pgd
  */
-#define pgd_index(addr)		((addr) >> PGDIR_SHIFT)
-#define pgd_offset(mm, addr)	(((mm)->pgd) + pgd_index(addr))
-#define pgd_offset_k(addr)	pgd_offset(&init_mm, addr)
 #define pgd_ERROR(e) \
 	pr_crit("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
 
diff --git a/arch/arc/kernel/disasm.c b/arch/arc/kernel/disasm.c
index 03f8b1be0c3a82ba27b54e0ba96243a4766f8b66..1e1db51b69414362f67e62813df484a39f1690ec 100644
--- a/arch/arc/kernel/disasm.c
+++ b/arch/arc/kernel/disasm.c
@@ -366,7 +366,7 @@ void __kprobes disasm_instr(unsigned long addr, struct disasm_state *state,
 	case op_SP:	/* LD_S|LDB_S b,[sp,u7], ST_S|STB_S b,[sp,u7] */
 		/* note: we are ignoring possibility of:
 		 * ADD_S, SUB_S, PUSH_S, POP_S as these should not
-		 * cause unaliged exception anyway */
+		 * cause unaligned exception anyway */
 		state->write = BITS(state->words[0], 6, 6);
 		state->zz = BITS(state->words[0], 5, 5);
 		if (state->zz)
@@ -503,7 +503,6 @@ int __kprobes disasm_next_pc(unsigned long pc, struct pt_regs *regs,
 {
 	struct disasm_state instr;
 
-	memset(&instr, 0, sizeof(struct disasm_state));
 	disasm_instr(pc, &instr, 0, regs, cregs);
 
 	*next_pc = pc + instr.instr_len;
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index dd77a0c8f740b6c8be4c688a909b825467e3ff5d..66ba549b520fc02a5518be15c795ae466b6539ee 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -196,6 +196,7 @@ tracesys_exit:
 	st  r0, [sp, PT_r0]     ; sys call return value in pt_regs
 
 	;POST Sys Call Ptrace Hook
+	mov r0, sp		; pt_regs needed
 	bl  @syscall_trace_exit
 	b   ret_from_exception ; NOT ret_from_system_call at is saves r0 which
 	; we'd done before calling post hook above
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index f748483628f2c22ec98408c056d417f0fe580179..3c1590c27fae3b3e72d37d01a25c5ca691c29bf3 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -319,7 +319,7 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
 	regs->ret = (unsigned long)ksig->ka.sa.sa_handler;
 
 	/*
-	 * handler returns using sigreturn stub provided already by userpsace
+	 * handler returns using sigreturn stub provided already by userspace
 	 * If not, nuke the process right away
 	 */
 	if(!(ksig->ka.sa.sa_flags & SA_RESTORER))
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
index 78e6d069b1c1279eb556b143fe6413ac5857208e..d947473f1e6da5f906ba25c7841c99bb981055ad 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -35,7 +35,7 @@ EXPORT_SYMBOL_GPL(smp_atomic_ops_lock);
 
 struct plat_smp_ops  __weak plat_smp_ops;
 
-/* XXX: per cpu ? Only needed once in early seconday boot */
+/* XXX: per cpu ? Only needed once in early secondary boot */
 struct task_struct *secondary_idle_tsk;
 
 /* Called from start_kernel */
@@ -274,7 +274,7 @@ static void ipi_send_msg_one(int cpu, enum ipi_msg_type msg)
 	 * and read back old value
 	 */
 	do {
-		new = old = READ_ONCE(*ipi_data_ptr);
+		new = old = *ipi_data_ptr;
 		new |= 1U << msg;
 	} while (cmpxchg(ipi_data_ptr, old, new) != old);
 
diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c
index d63ebd81f1c6d65bd98350aa4b3579c208a56093..99a9b92ed98d629e75783f71eef34f72d84800fd 100644
--- a/arch/arc/kernel/unaligned.c
+++ b/arch/arc/kernel/unaligned.c
@@ -237,7 +237,7 @@ int misaligned_fixup(unsigned long address, struct pt_regs *regs,
 	if (state.fault)
 		goto fault;
 
-	/* clear any remanants of delay slot */
+	/* clear any remnants of delay slot */
 	if (delay_mode(regs)) {
 		regs->ret = regs->bta & ~1U;
 		regs->status32 &= ~STATUS_DE_MASK;
diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
index 8aa1231865d15a39b52c11e63eac1b86686d0d11..5446967ea98d3c1715cf5cbb6acaba7ecf2df108 100644
--- a/arch/arc/mm/cache.c
+++ b/arch/arc/mm/cache.c
@@ -401,7 +401,7 @@ static inline void __before_dc_op(const int op)
 {
 	if (op == OP_FLUSH_N_INV) {
 		/* Dcache provides 2 cmd: FLUSH or INV
-		 * INV inturn has sub-modes: DISCARD or FLUSH-BEFORE
+		 * INV in turn has sub-modes: DISCARD or FLUSH-BEFORE
 		 * flush-n-inv is achieved by INV cmd but with IM=1
 		 * So toggle INV sub-mode depending on op request and default
 		 */