• Linus Torvalds's avatar
    Merge branch 'siginfo-linus' of... · 0214f46b
    Linus Torvalds authored
    Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
    Pull core signal handling updates from Eric Biederman:
     "It was observed that a periodic timer in combination with a
      sufficiently expensive fork could prevent fork from every completing.
      This contains the changes to remove the need for that restart.
      This set of changes is split into several parts:
       - The first part makes PIDTYPE_TGID a proper pid type instead
         something only for very special cases. The part starts using
         PIDTYPE_TGID enough so that in __send_signal where signals are
         actually delivered we know if the signal is being sent to a a group
         of processes or just a single process.
       - With that prep work out of the way the logic in fork is modified so
         that fork logically makes signals received while it is running
         appear to be received after the fork completes"
    * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (22 commits)
      signal: Don't send signals to tasks that don't exist
      signal: Don't restart fork when signals come in.
      fork: Have new threads join on-going signal group stops
      fork: Skip setting TIF_SIGPENDING in ptrace_init_task
      signal: Add calculate_sigpending()
      fork: Unconditionally exit if a fatal signal is pending
      fork: Move and describe why the code examines PIDNS_ADDING
      signal: Push pid type down into complete_signal.
      signal: Push pid type down into __send_signal
      signal: Push pid type down into send_signal
      signal: Pass pid type into do_send_sig_info
      signal: Pass pid type into send_sigio_to_task & send_sigurg_to_task
      signal: Pass pid type into group_send_sig_info
      signal: Pass pid and pid type into send_sigqueue
      posix-timers: Noralize good_sigevent
      signal: Use PIDTYPE_TGID to clearly store where file signals will be sent
      pid: Implement PIDTYPE_TGID
      pids: Move the pgrp and session pid pointers from task_struct to signal_struct
      kvm: Don't open code task_pid in kvm_vcpu_ioctl
      pids: Compute task_tgid using signal->leader_pid
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