interrupt: rename `guardian` to `interrupt_gate`

1 files changed, 7 insertions, 2 deletions

diff --git a/src/arch/x86_64/interrupt/mod.rs b/src/arch/x86_64/interrupt/mod.rs
index ef050b0..410996a 100644
--- a/src/arch/x86_64/interrupt/mod.rs
+++ b/src/arch/x86_64/interrupt/mod.rs
@@ -5,9 +5,14 @@ use core::arch::asm;
 
 #[no_mangle]
 #[cfg(target_arch = "x86_64")]
-extern "C" fn guardian(slot: u16) {
+extern "C" fn interrupt_gate(slot: u16) {
 	interrupt_disable();
-	println!("interrupt received {:x}", slot);
+	// NOTE: the interrupt handler should NEVER block on a lock; in this case
+	// the CGA screen is protected by a spinlock. The lock holder will never be
+	// able to release the lock if the interrupt handler blocks on it. Try
+	// spamming the keyboard with the following line of code uncommented: it
+	// will deadlock!
+	// println!("interrupt received {:x}", slot);
 	interrupt_enable();
 }