Btrfs: confirmation of value is added before trace_btrfs_get_extent() is called
We should confirm the value of extent_map before calling trace_btrfs_get_extent() because the value of extent_map has the possibility of NULL. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
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@ -5505,6 +5505,7 @@ insert:
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write_unlock(&em_tree->lock);
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out:
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if (em)
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trace_btrfs_get_extent(root, em);
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if (path)
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