• Linus Torvalds's avatar
    Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal · 9977d9b3
    Linus Torvalds authored
    Pull big execve/kernel_thread/fork unification series from Al Viro:
     "All architectures are converted to new model.  Quite a bit of that
      stuff is actually shared with architecture trees; in such cases it's
      literally shared branch pulled by both, not a cherry-pick.
      A lot of ugliness and black magic is gone (-3KLoC total in this one):
       - kernel_thread()/kernel_execve()/sys_execve() redesign.
         We don't do syscalls from kernel anymore for either kernel_thread()
         or kernel_execve():
         kernel_thread() is essentially clone(2) with callback run before we
         return to userland, the callbacks either never return or do
         successful do_execve() before returning.
         kernel_execve() is a wrapper for do_execve() - it doesn't need to
         do transition to user mode anymore.
         As a result kernel_thread() and kernel_execve() are
         arch-independent now - they live in kernel/fork.c and fs/exec.c
         resp.  sys_execve() is also in fs/exec.c and it's completely
       - daemonize() is gone, along with its parts in fs/*.c
       - struct pt_regs * is no longer passed to do_fork/copy_process/
       - sys_fork()/sys_vfork()/sys_clone() unified; some architectures
         still need wrappers (ones with callee-saved registers not saved in
         pt_regs on syscall entry), but the main part of those suckers is in
         kernel/fork.c now."
    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (113 commits)
      do_coredump(): get rid of pt_regs argument
      print_fatal_signal(): get rid of pt_regs argument
      ptrace_signal(): get rid of unused arguments
      get rid of ptrace_signal_deliver() arguments
      new helper: signal_pt_regs()
      unify default ptrace_signal_deliver
      flagday: kill pt_regs argument of do_fork()
      death to idle_regs()
      don't pass regs to copy_process()
      flagday: don't pass regs to copy_thread()
      bfin: switch to generic vfork, get rid of pointless wrappers
      xtensa: switch to generic clone()
      openrisc: switch to use of generic fork and clone
      unicore32: switch to generic clone(2)
      score: switch to generic fork/vfork/clone
      c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic clone()
      take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h
      mn10300: switch to generic fork/vfork/clone
      h8300: switch to generic fork/vfork/clone
      tile: switch to generic clone()
unistd32.h 14.2 KB