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1b214059be
do_write doesn't fully set up the first extent header on a new inode, so if we write a 0-length file, and don't write any data to the new file, we end up creating something that looks corrupt to kernelspace: EXT4-fs error (device loop0): ext4_ext_check_inode:464: inode #12: comm ls: bad header/extent: invalid magic - magic 0, entries 0, max 0(0), depth 0(0) Do something similar to ext4_ext_tree_init() here, and fill out the first extent header upon creation to avoid this. [YOCTO #3848] (From OE-Core rev: 7d1e51681d25f6e6d2c20744825723ad5c83861c) Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>