Re: [PATCH v8 01/11] btrfs: add raid stripe tree definitions

[Johannes Thumshirn]

On 11.09.23 23:01, Damien Le Moal wrote:
>> diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
>> index fc3c32186d7e..3fb758ce3ac0 100644
>> --- a/include/uapi/linux/btrfs_tree.h
>> +++ b/include/uapi/linux/btrfs_tree.h
>> @@ -4,9 +4,8 @@
>>   
>>   #include <linux/btrfs.h>
>>   #include <linux/types.h>
>> -#ifdef __KERNEL__
>>   #include <linux/stddef.h>
>> -#else
>> +#ifndef __KERNEL__
>>   #include <stddef.h>
>>   #endif
> 
> This change seems unrelated to the RAID stripe tree. Should this be a patch on
> its own ?

Nope it isn't. This patch introduces a user of __DECLARE_FLEX_ARRAY() 
and without the moved ifdef userspace can't find the definition of it.