Add linux-next specific files for 20201030

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

Merge branch 'akpm/master' into master

mm/gup: assert that the mmap lock is held in __get_user_pages()

After having cleaned up all GUP callers (except for the atomisp staging
driver, which currently gets mmap locking completely wrong [1]) to always
ensure that they hold the mmap lock when calling into GUP (unless the mm
is not yet globally visible), add an assertion to make sure it stays that
way going forward.

[1] https://lore.kernel.org/lkml/CAG48ez3tZAb9JVhw4T5e-i=h2_DUZxfNRTDsagSRCVazNXx5qA@mail.gmail.com/

Link: https://lkml.kernel.org/r/CAG48ez1GM==OnHpS=ghqZNJPn02FCDUEHc7GQmGRMXUD_aKudg@mail.gmail.com
Signed-off-by: Jann Horn <jannh@google.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Michel Lespinasse <walken@google.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

mmap locking API: don't check locking if the mm isn't live yet

In preparation for adding a mmap_assert_locked() check in
__get_user_pages(), teach the mmap_assert_*locked() helpers that it's fine
to operate on an mm without locking in the middle of execve() as long as
it hasn't been installed on a process yet.

Existing code paths that do this are (reverse callgraph):

  get_user_pages_remote
    get_arg_page
      copy_strings
      copy_string_kernel
      remove_arg_zero
    tomoyo_dump_page
      tomoyo_print_bprm
      tomoyo_scan_bprm
      tomoyo_environ

Link: https://lkml.kernel.org/r/CAG48ez03YJG9JU_6tGiMcaVjuTyRE_o4LEQ7901b5ZoCnNAjcg@mail.gmail.com
Signed-off-by: Jann Horn <jannh@google.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Michel Lespinasse <walken@google.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

Merge branch 'akpm-current/current' into master

Merge remote-tracking branch 'memblock/for-next' into master

Merge remote-tracking branch 'notifications/notifications-pipe-core' into master

Merge remote-tracking branch 'mhi/mhi-next' into master

Merge remote-tracking branch 'fpga/for-next' into master

Merge remote-tracking branch 'pidfd/for-next' into master

Merge remote-tracking branch 'xarray/main' into master

Merge remote-tracking branch 'nvmem/for-next' into master

Merge remote-tracking branch 'slimbus/for-next' into master

Merge remote-tracking branch 'seccomp/for-next/seccomp' into master

Merge remote-tracking branch 'rtc/rtc-next' into master

Merge remote-tracking branch 'coresight/next' into master

Merge remote-tracking branch 'livepatching/for-next' into master

Merge remote-tracking branch 'kselftest/next' into master

Merge remote-tracking branch 'pinctrl-samsung/for-next' into master

Merge remote-tracking branch 'pinctrl-intel/for-next' into master

Merge remote-tracking branch 'pinctrl/for-next' into master

Merge remote-tracking branch 'gpio-brgl/gpio/for-next' into master

Merge remote-tracking branch 'gpio/for-next' into master

Merge remote-tracking branch 'rpmsg/for-next' into master

Merge remote-tracking branch 'vhost/linux-next' into master

Merge remote-tracking branch 'scsi-mkp/for-next' into master

Merge remote-tracking branch 'dmaengine/next' into master

Merge remote-tracking branch 'icc/icc-next' into master

Merge remote-tracking branch 'mux/for-next' into master

Merge remote-tracking branch 'staging/staging-next' into master

# Conflicts:
# tools/testing/selftests/android/ion/ipcsocket.c
# tools/testing/selftests/android/ion/ipcsocket.h

Merge remote-tracking branch 'extcon/extcon-next' into master

Merge remote-tracking branch 'tty/tty-next' into master

Merge remote-tracking branch 'phy-next/next' into master

# Conflicts:
# MAINTAINERS

Merge remote-tracking branch 'usb-chipidea-next/for-usb-next' into master

Merge remote-tracking branch 'usb-serial/usb-next' into master

Merge remote-tracking branch 'usb/usb-next' into master

Merge remote-tracking branch 'ipmi/for-next' into master

Merge remote-tracking branch 'leds/for-next' into master

Merge remote-tracking branch 'drivers-x86/for-next' into master

Merge remote-tracking branch 'percpu/for-next' into master

Merge remote-tracking branch 'kvm-arm/next' into master

Merge remote-tracking branch 'rcu/rcu/next' into master

# Conflicts:
# include/linux/lockdep.h

Merge remote-tracking branch 'irqchip/irq/irqchip-next' into master

Merge remote-tracking branch 'edac/edac-for-next' into master

Merge remote-tracking branch 'clockevents/timers/drivers/next' into master

Merge remote-tracking branch 'tip/auto-latest' into master

Merge remote-tracking branch 'spi/for-next' into master

Merge remote-tracking branch 'audit/next' into master

Merge remote-tracking branch 'tpmdd/next' into master

Merge remote-tracking branch 'tomoyo/master' into master

Merge remote-tracking branch 'selinux/next' into master

Merge remote-tracking branch 'regulator/for-next' into master

Merge remote-tracking branch 'mmc/next' into master

Merge remote-tracking branch 'block/for-next' into master

Merge remote-tracking branch 'modules/modules-next' into master

Merge remote-tracking branch 'sound-asoc/for-next' into master

Merge remote-tracking branch 'sound/for-next' into master

Merge remote-tracking branch 'regmap/for-next' into master

Merge remote-tracking branch 'etnaviv/etnaviv/next' into master

Merge remote-tracking branch 'imx-drm/imx-drm/next' into master

Merge remote-tracking branch 'mali-dp/for-upstream/mali-dp' into master

next-20201029/drm-misc

Merge remote-tracking branch 'drm-intel/for-linux-next' into master

# Conflicts:
# drivers/gpu/drm/i915/display/intel_ddi.c
# drivers/gpu/drm/i915/display/intel_display.c

Merge remote-tracking branch 'amdgpu/drm-next' into master

# Conflicts:
# drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
# drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
# drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
# drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c
# drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

Merge remote-tracking branch 'mtd/mtd/next' into master

Merge remote-tracking branch 'gfs2/for-next' into master

Merge remote-tracking branch 'bluetooth/master' into master

Merge remote-tracking branch 'net-next/master' into master

Merge remote-tracking branch 'rdma/for-next' into master

Merge remote-tracking branch 'ieee1394/for-next' into master

Merge remote-tracking branch 'thermal/thermal/linux-next' into master

Merge remote-tracking branch 'opp/opp/linux-next' into master

Merge remote-tracking branch 'devfreq/devfreq-next' into master

Merge remote-tracking branch 'cpupower/cpupower' into master

Merge remote-tracking branch 'cpufreq-arm/cpufreq/arm/linux-next' into master

Merge remote-tracking branch 'pm/linux-next' into master

Merge remote-tracking branch 'v4l-dvb-next/master' into master

Merge remote-tracking branch 'v4l-dvb/master' into master

Merge remote-tracking branch 'jc_docs/docs-next' into master

Merge remote-tracking branch 'hwmon-staging/hwmon-next' into master

Merge remote-tracking branch 'dmi/dmi-for-next' into master

Merge remote-tracking branch 'hid/for-next' into master

Merge remote-tracking branch 'pstore/for-next/pstore' into master

# Conflicts:
# .mailmap

Merge remote-tracking branch 'printk/for-next' into master

Merge remote-tracking branch 'vfs/for-next' into master

Merge remote-tracking branch 'file-locks/locks-next' into master

Merge remote-tracking branch 'xfs/for-next' into master

Merge remote-tracking branch 'f2fs/dev' into master

Merge remote-tracking branch 'ext4/dev' into master

Merge remote-tracking branch 'ext3/for_next' into master

Merge remote-tracking branch 'btrfs/for-next' into master

Merge remote-tracking branch 'xtensa/xtensa-for-next' into master

Merge remote-tracking branch 's390/for-next' into master

Merge remote-tracking branch 'risc-v/for-next' into master

# Conflicts:
# arch/riscv/kernel/vdso/Makefile

Merge remote-tracking branch 'parisc-hd/for-next' into master

Merge remote-tracking branch 'nds32/next' into master

Merge remote-tracking branch 'mips/mips-next' into master

Merge remote-tracking branch 'm68knommu/for-next' into master

Merge remote-tracking branch 'h8300/h8300-next' into master

Merge remote-tracking branch 'csky/linux-next' into master