[PATCH 0/9] user_mode_vm removal and associated cleanups

[Andy Lutomirski <luto@kernel.org>]

Hi all-

The user_mode vs user_mode_vm distinction scares me.  Let's fix it.
This series adds user_mode_ignore_vm86, makes user_mode reliable,
and removes user_mode_vm.  It also tidies up a couple warts I found
along the way.

This survives basic testing, but I haven't tried that hard to test it.

Thoughts?

Ingo, this may conflict a bit with the do_debug and do_bounds fixes.

Andy Lutomirski (9):
  x86, fault: Use TASK_SIZE_MAX in is_prefetch
  x86, perf: Fix incorrect TIF_IA32 check in code_segment_base
  x86: Add user_mode_ignore_vm86
  x86, perf: Explicitly optimize vm86 handling in code_segment_base
  x86, traps: Use user_mode_ignore_vm86 where appropriate
  x86: Make user_mode work correctly if regs came from vm86 mode
  x86, treewide: s/user_mode_vm/user_mode/g
  x86: Remove user_mode_vm
  x86, traps: Replace some open-coded vm86 checks with v8086_mode

 arch/x86/include/asm/ptrace.h    | 33 +++++++++++++++++++++------------
 arch/x86/kernel/alternative.c    |  2 +-
 arch/x86/kernel/cpu/perf_event.c | 20 ++++++++++----------
 arch/x86/kernel/crash.c          |  2 +-
 arch/x86/kernel/dumpstack.c      |  4 ++--
 arch/x86/kernel/dumpstack_32.c   |  4 ++--
 arch/x86/kernel/i387.c           |  2 +-
 arch/x86/kernel/irq_32.c         |  2 +-
 arch/x86/kernel/irq_64.c         |  2 +-
 arch/x86/kernel/kgdb.c           |  4 ++--
 arch/x86/kernel/kprobes/core.c   |  4 ++--
 arch/x86/kernel/process_32.c     |  2 +-
 arch/x86/kernel/ptrace.c         |  2 +-
 arch/x86/kernel/time.c           |  2 +-
 arch/x86/kernel/traps.c          | 29 +++++++++++++----------------
 arch/x86/kernel/uprobes.c        |  2 +-
 arch/x86/mm/fault.c              |  8 ++++----
 arch/x86/oprofile/backtrace.c    |  2 +-
 drivers/misc/sgi-xp/xpc_main.c   |  2 +-
 19 files changed, 67 insertions(+), 61 deletions(-)

-- 
2.3.0