cleanup loop

0655445b · rsc · 2186f88c · 0655445b
--- a/bio.c
+++ b/bio.c
@@ -71,20 +71,18 @@ bget(uint dev, uint sector)
 loop:
  // Try for cached block.
-  for(b = bufhead.next; b != &bufhead; b = b->next)
+  for(b = bufhead.next; b != &bufhead; b = b->next){
    if((b->flags & (B_BUSY|B_VALID)) &&
-       b->dev == dev && b->sector == sector)
+       b->dev == dev && b->sector == sector){
-      break;
+      if(b->flags & B_BUSY){
+        sleep(buf, &buf_table_lock);
-  if(b != &bufhead){
+        goto loop;
-    if(b->flags & B_BUSY){
+      }
-      sleep(buf, &buf_table_lock);
+      b->flags |= B_BUSY;
-      goto loop;
+      // b->flags &= ~B_VALID; // Force reread from disk
+      release(&buf_table_lock);
+      return b;
    }
-    b->flags |= B_BUSY;
-    // b->flags &= ~B_VALID; // Force reread from disk
-    release(&buf_table_lock);
-    return b;
  }
  // Allocate fresh block.