Merge tag 'x86-entry-2020-10-12' of git://

Pull x86 entry code updates from Thomas Gleixner:
 "More consolidation and correctness fixes for the debug exception:

   - Ensure BTF synchronization under all circumstances

   - Distangle kernel and user mode #DB further

   - Get ordering vs. the debug notifier correct to make KGDB work more

   - Cleanup historical gunk and make the code simpler to understand"

* tag 'x86-entry-2020-10-12' of git://
  x86/debug: Change thread.debugreg6 to thread.virtual_dr6
  x86/debug: Support negative polarity DR6 bits
  x86/debug: Simplify hw_breakpoint_handler()
  x86/debug: Remove aout_dump_debugregs()
  x86/debug: Remove the historical junk
  x86/debug: Move cond_local_irq_enable() block into exc_debug_user()
  x86/debug: Move historical SYSENTER junk into exc_debug_kernel()
  x86/debug: Simplify #DB signal code
  x86/debug: Remove handle_debug(.user) argument
  x86/debug: Move kprobe_debug_handler() into exc_debug_kernel()
  x86/debug: Sync BTF earlier