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-i...@jp.fujitsu.com>
---
fs/btrfs/inode.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index cad0c57..b8f53e8 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6123,7 +6123,8 @@ insert:
write_unlock(&em_tree->lock);
out:
- trace_btrfs_get_extent(root, em);
+ if (em)
+ trace_btrfs_get_extent(root, em);
if (path)
btrfs_free_path(path);
--
1.7.11.4
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