frans' fixes to iput()

aba8423c · Robert Morris · 9cec455b · aba8423c
--- a/fs.c
+++ b/fs.c
@@ -322,12 +322,14 @@ iput(struct inode *ip)
  acquire(&icache.lock);
  if(ip->ref == 1 && (ip->flags & I_VALID) && ip->nlink == 0){
    // inode has no links and no other references: truncate and free.
+    acquiresleep(&ip->lock);
    release(&icache.lock);
    itrunc(ip);
    ip->type = 0;
    iupdate(ip);
    acquire(&icache.lock);
    ip->flags = 0;
+    releasesleep(&ip->lock);
  }
  ip->ref--;
  release(&icache.lock);