Terminal lock

kernel/kprintf.h

@@ -7,7 +7,9 @@
 
 #define kprintf(fmt, ...) \
   do { \
+    spinlock_acquire(&TERM.spinlock); \
     printf_(fmt, ##__VA_ARGS__); \
+    spinlock_release(&TERM.spinlock); \
   } while(0)
 
 #define ksprintf    sprintf_

kernel/term/term.c

@@ -32,6 +32,7 @@ void term_doinit(void *addr) {
 
 void term_init(void *addr) {
   term_doinit(addr);
+  spinlock_init(&TERM.spinlock);
 }
 
 void term_write_unsafe(const char *s, size_t len) {

kernel/term/term.h

@@ -7,6 +7,7 @@
 
 typedef struct {
   struct flanterm_context *ftctx;
+  SpinLock spinlock;
 } Term;
 
 extern Term TERM;