On Tue, May 18, 2021 at 05:44:22PM -0700, Andrew Morton wrote: > On Tue, 18 May 2021 10:20:31 +0300 Mike Rapoport <rppt@xxxxxxxxxx> wrote: > > > From: Mike Rapoport <rppt@xxxxxxxxxxxxx> > > > > Introduce "memfd_secret" system call with the ability to create memory > > areas visible only in the context of the owning process and not mapped not > > only to other processes but in the kernel page tables as well. > > > > ... > > > > --- a/mm/Kconfig > > +++ b/mm/Kconfig > > @@ -901,4 +901,9 @@ config KMAP_LOCAL > > # struct io_mapping based helper. Selected by drivers that need them > > config IO_MAPPING > > bool > > + > > +config SECRETMEM > > + def_bool ARCH_HAS_SET_DIRECT_MAP && !EMBEDDED > > + select STRICT_DEVMEM > > + > > endmenu > > WARNING: unmet direct dependencies detected for STRICT_DEVMEM > Depends on [n]: MMU [=y] && DEVMEM [=n] && (ARCH_HAS_DEVMEM_IS_ALLOWED [=y] || GENERIC_LIB_DEVMEM_IS_ALLOWED [=n]) > Selected by [y]: > - SECRETMEM [=y] > > so I went back to the v19 version, with Ouch, sorry, I forgot to remove that hunk, v19 is the correct version. > --- a/mm/Kconfig~mm-introduce-memfd_secret-system-call-to-create-secret-memory-areas-fix > +++ a/mm/Kconfig > @@ -907,6 +907,5 @@ config IO_MAPPING > > config SECRETMEM > def_bool ARCH_HAS_SET_DIRECT_MAP && !EMBEDDED > - select STRICT_DEVMEM > > endmenu > _ > -- Sincerely yours, Mike.
