src/io/term/term.c

@@ -34,7 +34,7 @@ struct spinlock_t term_lock = {0};
 extern int panic_count;
 
 /*
- * _putchar - Writes a character to terminal
+ * _putchar - Writes a character to terminal (DEPRECATED)
  * @character: character to write
  */
 void _putchar(char character)
@@ -43,6 +43,14 @@ void _putchar(char character)
 	flanterm_write(ft_ctx, &character, 1);
 }
 
+/*
+ * internal_putc - Internal putchar function
+ * @c: char to print
+ * @_: (unused, for nanoprintf)
+ *
+ * Prints a character to the terminal if it's ready,
+ * and also to the serial interface if it's ready.
+ */
 void internal_putc(int c, void *_)
 {
     (void)_;
@@ -58,7 +66,6 @@ void internal_putc(int c, void *_)
         }
     }
 
-    
     if (init.serial) {
         if (ch == '\n') {
             skputc('\r');
@@ -67,6 +74,16 @@ void internal_putc(int c, void *_)
     }
 }
 
+/*
+ * printf - Fromatted printing
+ * @fmt: format string
+ * @...: variadic arguments
+ *
+ * Wrapper for nanoprintf
+ *
+ * Return:
+ * <ret> - number of characters sent to the callback
+ */
 int printf(const char* fmt, ...)
 {
     va_list args;

src/sched/spinlock.c

@@ -9,6 +9,13 @@
 #include "kernel.h"
 #include "spinlock.h"
 
+/*
+ * spinlock_acquire - Lock a lock
+ * @lock: pointer to desired spinlock
+ *
+ * Saves the RFLAGS register, then acquires a lock.
+ * Pause instruction is used to ease the CPU.
+ */
 void spinlock_acquire(struct spinlock_t* lock)
 {
     uint64_t rflags;
@@ -21,6 +28,14 @@ void spinlock_acquire(struct spinlock_t* lock)
     lock->rflags = rflags;
 }
 
+/*
+ * spinlock_release - Unlock a lock
+ * @lock: pointer to desired spinlock
+ *
+ * Gets saved RFLAGS register from the lock and
+ * unlocks it (clears locked state).
+ * RFLAGS is then restored.
+ */
 void spinlock_release(struct spinlock_t* lock)
 {
     uint64_t rflags = lock->rflags;