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 --- 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 _
