Re: linux-next: manual merge of the vfs tree with the overlayfs tree

[Miklos Szeredi]

On Tue, Jun 19, 2018 at 10:40 AM, David Howells <dhowells@xxxxxxxxxx> wrote:
> Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
>>  /* These sb flags are internal to the kernel */
>>  #define MS_SUBMOUNT     (1<<26)
>> -#define MS_NOREMOTELOCK      (1<<27)
>>  #define MS_NOSEC     (1<<28)
>>  #define MS_BORN              (1<<29)
>>  #define MS_ACTIVE    (1<<30)
>
> Ummm...  Can MS_NOREMOTELOCK be removed?  I know it's listed in the internal
> flags section, but all of these have been exposed to userspace for over a
> year.  Ideally, I'd remove all of these from UAPI, but can anyone guarantee
> that no pieces of userspace refer to them?

The number of potential users of these flags is pretty low, so I think
we can try and remove them and hope nothing breaks.

Probably best left after the dust settles.

Thanks,
Miklos