Re: [PATCH 1/4] Btrfs: use radix tree for checksum

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  int set_state_private(struct extent_io_tree *tree, u64 start, u64 private)
  {
[...]
+	ret = radix_tree_insert(&tree->csum, (unsigned long)start,
+			       (void *)((unsigned long)private<<  1));

Will this fail for 64bit files on 32bit hosts?

+	BUG_ON(ret);

I wonder if we can patch BUG_ON() to break the build if its only
argument is "ret".

- z
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