5 files changed, 6 insertions, 6 deletions
diff --git a/src/kernel/arch/i386/tty/serial.c b/src/kernel/arch/i386/tty/serial.c
index 6bfe212..a259750 100644
--- a/src/kernel/arch/i386/tty/serial.c
+++ b/src/kernel/arch/i386/tty/serial.c
@@ -4,7 +4,7 @@
 
 const int COM1 = 0x3f8;
 
-void serial_init() {
+void serial_init(void) {
 	// see https://www.sci.muni.cz/docs/pc/serport.txt
 
 	port_outb(COM1 + 1, 0x00); // disable interrupts, we won't be using them
diff --git a/src/kernel/arch/i386/tty/serial.h b/src/kernel/arch/i386/tty/serial.h
index ac7131b..2332113 100644
--- a/src/kernel/arch/i386/tty/serial.h
+++ b/src/kernel/arch/i386/tty/serial.h
@@ -2,4 +2,4 @@
 #include <stddef.h>
 
 void serial_write(const char *buf, size_t len);
-void serial_init();
+void serial_init(void);
diff --git a/src/kernel/arch/i386/tty/tty.c b/src/kernel/arch/i386/tty/tty.c
index 89a8602..b469285 100644
--- a/src/kernel/arch/i386/tty/tty.c
+++ b/src/kernel/arch/i386/tty/tty.c
@@ -2,7 +2,7 @@
 #include <kernel/arch/i386/tty/vga.h>
 #include <kernel/arch/log.h>
 
-void tty_init() {
+void tty_init(void) {
 	vga_clear();
 	serial_init();
 
diff --git a/src/kernel/arch/i386/tty/vga.c b/src/kernel/arch/i386/tty/vga.c
index 3cd1034..24bbf98 100644
--- a/src/kernel/arch/i386/tty/vga.c
+++ b/src/kernel/arch/i386/tty/vga.c
@@ -9,7 +9,7 @@ static const size_t     vga_len = 80 * 25;
 static struct vga_cell *vga     = (void*) 0xB8000;
 static size_t           vga_pos = 0;
 
-static void vga_scroll() {
+static void vga_scroll(void) {
 	for (size_t i = 0; i < vga_len - 80; i++)
 		vga[i] = vga[i + 80];
 	vga_pos -= 80;
@@ -26,7 +26,7 @@ void vga_write(const char *buf, size_t len) {
 		vga_putchar(buf[i]);
 }
 
-void vga_clear() {
+void vga_clear(void) {
 	for (size_t i = 0; i < vga_len; i++)
 		vga[i].c = ' ';
 	vga_pos = 0;
diff --git a/src/kernel/arch/i386/tty/vga.h b/src/kernel/arch/i386/tty/vga.h
index c8747c7..69b1ab7 100644
--- a/src/kernel/arch/i386/tty/vga.h
+++ b/src/kernel/arch/i386/tty/vga.h
@@ -2,4 +2,4 @@
 #include <stddef.h>
 
 void vga_write(const char *buf, size_t len);
-void vga_clear();
+void vga_clear(void);