disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/ceph/striper.h
..
..
@@ -66,4 +66,6 @@
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 			struct ceph_file_extent **file_extents,
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 			u32 *num_file_extents);
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+u64 ceph_get_num_objects(struct ceph_file_layout *l, u64 size);
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+
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 #endif