fix most current compiler warnings

stack_top got changed into a char, because `extern void` isn't even
valid. others are self-explanatory

3 files changed, 7 insertions, 5 deletions

diff --git a/src/kernel/arch/generic.h b/src/kernel/arch/generic.h
index 17980fd..e06ac27 100644
--- a/src/kernel/arch/generic.h
+++ b/src/kernel/arch/generic.h
@@ -7,7 +7,7 @@
 #define PAGE_SIZE 4096
 
 // src/arch/i386/boot.s
-extern void stack_top;
+extern char stack_top;
 
 __attribute__((noreturn))
 void halt_cpu();
diff --git a/src/kernel/arch/i386/interrupts/isr.c b/src/kernel/arch/i386/interrupts/isr.c
index d2e3d0f..35796fa 100644
--- a/src/kernel/arch/i386/interrupts/isr.c
+++ b/src/kernel/arch/i386/interrupts/isr.c
@@ -4,21 +4,23 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#define UNUSED __attribute__((unused))
+
 bool isr_test_interrupt_called = false;
 
 __attribute__((interrupt))
-void isr_double_fault(struct interrupt_frame *frame) {
+void isr_double_fault(UNUSED struct interrupt_frame *frame) {
 	log_const("#DF");
 	panic();
 }
 
 __attribute__((interrupt))
-void isr_general_protection_fault(struct interrupt_frame *frame) {
+void isr_general_protection_fault(UNUSED struct interrupt_frame *frame) {
 	log_const("#GP");
 	panic();
 }
 
 __attribute__((interrupt))
-void isr_test_interrupt(struct interrupt_frame *frame) {
+void isr_test_interrupt(UNUSED struct interrupt_frame *frame) {
 	isr_test_interrupt_called = true;
 }
diff --git a/src/kernel/arch/i386/tty.c b/src/kernel/arch/i386/tty.c
index b9ebdb6..0858bd7 100644
--- a/src/kernel/arch/i386/tty.c
+++ b/src/kernel/arch/i386/tty.c
@@ -10,7 +10,7 @@ static struct vga_cell *vga     = (void*) 0xB8000;
 static size_t           vga_pos = 0;
 
 static void tty_scroll() {
-	for (int i = 0; i < vga_len - 80; i++) {
+	for (size_t i = 0; i < vga_len - 80; i++) {
 		vga[i] = vga[i + 80];
 	}
 	vga_pos -= 80;