interrupts could be recursive since lapic_eoi() called before rti

so fast interrupts overflow the kernel stack
fix: cli() before lapic_eoi()

1 files changed, 6 insertions, 0 deletions

diff --git a/fd.c b/fd.c
index 983497f..d162813 100644
--- a/fd.c
+++ b/fd.c
@@ -13,6 +13,12 @@ struct devsw devsw[NDEV];
 
 struct fd fds[NFD];
 
+void
+fd_init(void)
+{
+  initlock(&fd_table_lock, "fd_table");
+}
+
 /*
  * allocate a file descriptor number for curproc.
  */