ext4: fix ext4_fsymlink creation
ext4_dir: fix non existing entry creation issue
Make ext4_xattr & ext4_extents GPL licensed
ext4: fix transaction start/stop scopes
ext4_dir_idx: make qsort as a default dir idx sort algorithm
Suppress gcc 7.xx warnings (fall through in switch statement)
ext4_config: add defines allowing disabling xattr and extent modules
Fix a compile issue with big endian config & some small issues fixes