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, 7 insertions, 1 deletions

diff --git a/fs.c b/fs.c
index 126c18f..b298d7f 100644
--- a/fs.c
+++ b/fs.c
@@ -13,10 +13,16 @@
 // these are inodes currently in use
 // an entry is free if count == 0
 struct inode inode[NINODE];
-struct spinlock inode_table_lock = { "inode_table" };
+struct spinlock inode_table_lock;
 
 uint rootdev = 1;
 
+void
+iinit(void)
+{
+  initlock(&inode_table_lock, "inode_table");
+}
+
 static uint 
 balloc(uint dev) 
 {