add void to functions with no arguments

cpu/exception.c

@@ -173,7 +173,7 @@ static void isr31(struct interrupt_descriptor_32 *frame) {
 }
 
 
-void exception_handlers_init() {
+void exception_handlers_init(void) {
     idt_register_handler(0, (size_t)isr0);
     idt_register_handler(1, (size_t)isr1);
     idt_register_handler(2, (size_t)isr2);

cpu/exception.h

@@ -1,6 +1,6 @@
 #ifndef _EXCEPTION_H
 #define _EXCEPTION_H
 
-void exception_handlers_init();
+void exception_handlers_init(void);
 
 #endif

cpu/idt.c

@@ -6,7 +6,7 @@
 struct interrupt_descriptor_32 idt[256];
 static size_t idt_ptr[2];
 
-void idt_init() {
+void idt_init(void) {
     size_t idt_address = (size_t)idt;
     idt_ptr[0] = (sizeof (struct interrupt_descriptor_32) * 256) + ((idt_address & 0xffff) << 16);
     idt_ptr[1] = idt_address >> 16;

cpu/idt.h

@@ -16,7 +16,7 @@ struct interrupt_descriptor_32 {
     uint16_t offset_2;        // offset bits 16..31
 } __attribute__((__packed__)); 
 
-void idt_init();
+void idt_init(void);
 void idt_register_handler(uint8_t interrupt, size_t address);
 
 #endif

ps2/keyboard.c

@@ -58,7 +58,7 @@ end:
     pic_send_eoi(1);
 }
 
-void keyboard_init() {
+void keyboard_init(void) {
     pic_irq_clear_mask(1);
     idt_register_handler(33, (size_t)irq);
     inb(0x60);

ps2/keyboard.h

@@ -1,6 +1,6 @@
 #ifndef _KEYBOARD_H
 #define _KEYBOARD_H
 
-void keyboard_init();
+void keyboard_init(void);
 
 #endif

std/kstd.c

@@ -118,7 +118,8 @@ void kputs(const char* data) {
     kprintf("%s\n", data);
 }
 
-void kabort() {
+__attribute__((__noreturn__))
+void kabort(void) {
     kprintf("kabort(): halting kernel...\n");
     asm volatile("cli");
     asm volatile("hlt");

std/kstd.h

@@ -6,6 +6,8 @@
 int kputchar(int ic);
 int kprintf(const char* restrict format, ...);
 void kputs(const char* data);
-void kabort();
+
+__attribute__((__noreturn__))
+void kabort(void);
 
 #endif