Because sleeplocks replaced B_BUSY the holding test can

be more specific (thanks Mark Morrissey)

Because sleeplocks replaced B_BUSY the holding test can
0b86d037 · Frans Kaashoek · 0b6f4c08 · 0b86d037
--- a/sleeplock.c
+++ b/sleeplock.c
@@ -47,7 +47,7 @@ holdingsleep(struct sleeplock *lk)
  int r;
  
  acquire(&lk->lk);
-  r = lk->locked;
+  r = lk->locked && (lk->pid == myproc()->pid);
  release(&lk->lk);
  return r;
 }