[PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas

[Qian Cai]

On Wed, 2020-09-16 at 10:35 +0300, Mike Rapoport wrote:
> From: Mike Rapoport <rppt at linux.ibm.com>
> 
> Hi,
> 
> This is an implementation of "secret" mappings backed by a file descriptor. 
> I've dropped the boot time reservation patch for now as it is not strictly
> required for the basic usage and can be easily added later either with or
> without CMA.

On powerpc: https://gitlab.com/cailca/linux-mm/-/blob/master/powerpc.config

There is a compiling warning from the today's linux-next:

<stdin>:1532:2: warning: #warning syscall memfd_secret not implemented [-Wcpp]