ARC: -Wmissing-prototype warning fixes

Anrd reported [1] new compiler warnings due to -Wmissing-protype.
These are for non static functions mostly used in asm code hence not
exported already. Fix this by adding the prototypes.

[1] https://lore.kernel.org/lkml/[email protected]

Reviewed-by: Arnd Bergmann <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

7 files changed, 10 insertions, 5 deletions

diff --git a/arch/arc/kernel/ctx_sw.c b/arch/arc/kernel/ctx_sw.c
index 1a76f2d6f694..bf16f777a0bc 100644
--- a/arch/arc/kernel/ctx_sw.c
+++ b/arch/arc/kernel/ctx_sw.c
@@ -12,7 +12,7 @@
  */
 
 #include <asm/asm-offsets.h>
-#include <linux/sched.h>
+#include <asm/switch_to.h>
 #include <linux/sched/debug.h>
 
 #define KSP_WORD_OFF 	((TASK_THREAD + THREAD_KSP) / 4)
diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c
index 721d465f1580..4c9e61457b2f 100644
--- a/arch/arc/kernel/devtree.c
+++ b/arch/arc/kernel/devtree.c
@@ -12,6 +12,7 @@
 #include <linux/of.h>
 #include <linux/of_fdt.h>
 #include <asm/mach_desc.h>
+#include <asm/serial.h>
 
 #ifdef CONFIG_SERIAL_EARLYCON
 
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c
index 5cda19d0aa91..678898757e47 100644
--- a/arch/arc/kernel/intc-arcv2.c
+++ b/arch/arc/kernel/intc-arcv2.c
@@ -108,7 +108,7 @@ static void arcv2_irq_unmask(struct irq_data *data)
 	write_aux_reg(AUX_IRQ_ENABLE, 1);
 }
 
-void arcv2_irq_enable(struct irq_data *data)
+static void arcv2_irq_enable(struct irq_data *data)
 {
 	/* set default priority */
 	write_aux_reg(AUX_IRQ_SELECT, data->hwirq);
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index 3c1590c27fae..0b3bb529d246 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -53,6 +53,7 @@
 #include <linux/sched/task_stack.h>
 
 #include <asm/ucontext.h>
+#include <asm/entry.h>
 
 struct rt_sigframe {
 	struct siginfo info;
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
index 409cfa4675b4..8d9b188caa27 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -23,9 +23,10 @@
 #include <linux/export.h>
 #include <linux/of_fdt.h>
 
-#include <asm/processor.h>
-#include <asm/setup.h>
 #include <asm/mach_desc.h>
+#include <asm/setup.h>
+#include <asm/smp.h>
+#include <asm/processor.h>
 
 #ifndef CONFIG_ARC_HAS_LLSC
 arch_spinlock_t smp_atomic_ops_lock = __ARCH_SPIN_LOCK_UNLOCKED;
@@ -351,7 +352,7 @@ static inline int __do_IPI(unsigned long msg)
  * arch-common ISR to handle for inter-processor interrupts
  * Has hooks for platform specific IPI
  */
-irqreturn_t do_IPI(int irq, void *dev_id)
+static irqreturn_t do_IPI(int irq, void *dev_id)
 {
 	unsigned long pending;
 	unsigned long __maybe_unused copy;
diff --git a/arch/arc/kernel/stacktrace.c b/arch/arc/kernel/stacktrace.c
index 5372dc04e784..ea99c066ef25 100644
--- a/arch/arc/kernel/stacktrace.c
+++ b/arch/arc/kernel/stacktrace.c
@@ -29,6 +29,7 @@
 
 #include <asm/arcregs.h>
 #include <asm/unwind.h>
+#include <asm/stacktrace.h>
 #include <asm/switch_to.h>
 
 /*-------------------------------------------------------------------------
diff --git a/arch/arc/kernel/traps.c b/arch/arc/kernel/traps.c
index 6b83e3f2b41c..2f7eb786695b 100644
--- a/arch/arc/kernel/traps.c
+++ b/arch/arc/kernel/traps.c
@@ -16,6 +16,7 @@
 #include <linux/ptrace.h>
 #include <linux/kprobes.h>
 #include <linux/kgdb.h>
+#include <asm/entry.h>
 #include <asm/setup.h>
 #include <asm/unaligned.h>
 #include <asm/kprobes.h>