> On Oct 18, 2018, at 7:15 AM, Florian Weimer <fw@deneb.enyo.de> wrote:
> 
> * Miklos Szeredi:
> 
>> #define STATX__RESERVED		0x80000000U	/* Reserved for future struct statx expansion */
> 
> What about this?  Isn't it similar to STATX_ALL in the sense that we
> don't know yet what it will mean?

No, this means that this last bit will be used for increasing the size of the
stx_mask field at some point in the future.  IMHO, this is present as a reminder
to any developer who is adding fields in the future not to use the last flag.

Cheers, Andreas