vfs_parse_fs_qstr
ret = vfs_parse_fs_qstr(fc, "source",
EXPORT_SYMBOL(vfs_parse_fs_qstr);
ret = vfs_parse_fs_qstr(fc, "source",
extern int vfs_parse_fs_qstr(struct fs_context *fc, const char *key,
return vfs_parse_fs_qstr(fc, key, value ? &QSTR(value) : NULL);