1. 17 Jul, 2019 1 commit
  2. 24 May, 2019 1 commit
  3. 21 May, 2019 1 commit
  4. 15 May, 2019 2 commits
  5. 21 Dec, 2018 1 commit
  6. 27 Nov, 2018 1 commit
  7. 14 Mar, 2018 2 commits
  8. 11 Feb, 2018 1 commit
    • Linus Torvalds's avatar
      vfs: do bulk POLL* -> EPOLL* replacement · a9a08845
      Linus Torvalds authored
      This is the mindless scripted replacement of kernel use of POLL*
      variables as described by Al, done by this script:
      
          for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
              L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
              for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
          done
      
      with de-mangling cleanups yet to come.
      
      NOTE! On almost all architectures, the EPOLL* constants have the same
      values as the POLL* constants do.  But they keyword here is "almost".
      For various bad reasons they aren't the same, and epoll() doesn't
      actually work quite correctly in some cases due to this on Sparc et al.
      
      The next patch from Al will sort out the final differences, and we
      should be all done.
      Scripted-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a9a08845
  9. 07 Feb, 2018 1 commit
    • Arnd Bergmann's avatar
      pps: parport: use timespec64 instead of timespec · 28f3a488
      Arnd Bergmann authored
      getnstimeofday() is deprecated, so I'm converting this to use
      ktime_get_real_ts64() as a safe replacement.  I considered using
      ktime_get_real() instead, but since the algorithm here depends on the
      exact timing, I decided to introduce fewer changes and leave the code
      that determines the nanoseconds since the last seconds wrap untouched.
      
      It's not entirely clear to me whether we should also change the time
      base to CLOCK_BOOTTIME or CLOCK_TAI.  With boottime, we would be
      independent of changes due to settimeofday() and only see the speed
      adjustment from the upstream clock source, with the downside of having
      the signal be at an arbirary offset from the start of the UTC second
      signal.  With CLOCK_TAI, we would use the same offset from the UTC
      second as before and still suffer from settimeofday() adjustments, but
      would be less confused during leap seconds.
      
      Both boottime and tai only offer usable (i.e.  avoiding ktime_t to
      timespec64 conversion) interfaces for ktime_t though, so either way,
      changing it wouldn't take significantly more work.  CLOCK_MONOTONIC
      could be used with ktime_get_ts64(), but would lose synchronization
      across a suspend/resume cycle, which seems worse.
      
      Link: http://lkml.kernel.org/r/20180116171451.3095620-1-arnd@arndb.deSigned-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarRodolfo Giometti <giometti@enneenne.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      28f3a488
  10. 28 Nov, 2017 1 commit
  11. 21 Nov, 2017 1 commit
    • Kees Cook's avatar
      treewide: setup_timer() -> timer_setup() · e99e88a9
      Kees Cook authored
      This converts all remaining cases of the old setup_timer() API into using
      timer_setup(), where the callback argument is the structure already
      holding the struct timer_list. These should have no behavioral changes,
      since they just change which pointer is passed into the callback with
      the same available pointers after conversion. It handles the following
      examples, in addition to some other variations.
      
      Casting from unsigned long:
      
          void my_callback(unsigned long data)
          {
              struct something *ptr = (struct something *)data;
          ...
          }
          ...
          setup_timer(&ptr->my_timer, my_callback, ptr);
      
      and forced object casts:
      
          void my_callback(struct something *ptr)
          {
          ...
          }
          ...
          setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr);
      
      become:
      
          void my_callback(struct timer_list *t)
          {
              struct something *ptr = from_timer(ptr, t, my_timer);
          ...
          }
          ...
          timer_setup(&ptr->my_timer, my_callback, 0);
      
      Direct function assignments:
      
          void my_callback(unsigned long data)
          {
              struct something *ptr = (struct something *)data;
          ...
          }
          ...
          ptr->my_timer.function = my_callback;
      
      have a temporary cast added, along with converting the args:
      
          void my_callback(struct timer_list *t)
          {
              struct something *ptr = from_timer(ptr, t, my_timer);
          ...
          }
          ...
          ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback;
      
      And finally, callbacks without a data assignment:
      
          void my_callback(unsigned long data)
          {
          ...
          }
          ...
          setup_timer(&ptr->my_timer, my_callback, 0);
      
      have their argument renamed to verify they're unused during conversion:
      
          void my_callback(struct timer_list *unused)
          {
          ...
          }
          ...
          timer_setup(&ptr->my_timer, my_callback, 0);
      
      The conversion is done with the following Coccinelle script:
      
      spatch --very-quiet --all-includes --include-headers \
      	-I ./arch/x86/include -I ./arch/x86/include/generated \
      	-I ./include -I ./arch/x86/include/uapi \
      	-I ./arch/x86/include/generated/uapi -I ./include/uapi \
      	-I ./include/generated/uapi --include ./include/linux/kconfig.h \
      	--dir . \
      	--cocci-file ~/src/data/timer_setup.cocci
      
      @fix_address_of@
      expression e;
      @@
      
       setup_timer(
      -&(e)
      +&e
       , ...)
      
      // Update any raw setup_timer() usages that have a NULL callback, but
      // would otherwise match change_timer_function_usage, since the latter
      // will update all function assignments done in the face of a NULL
      // function initialization in setup_timer().
      @change_timer_function_usage_NULL@
      expression _E;
      identifier _timer;
      type _cast_data;
      @@
      
      (
      -setup_timer(&_E->_timer, NULL, _E);
      +timer_setup(&_E->_timer, NULL, 0);
      |
      -setup_timer(&_E->_timer, NULL, (_cast_data)_E);
      +timer_setup(&_E->_timer, NULL, 0);
      |
      -setup_timer(&_E._timer, NULL, &_E);
      +timer_setup(&_E._timer, NULL, 0);
      |
      -setup_timer(&_E._timer, NULL, (_cast_data)&_E);
      +timer_setup(&_E._timer, NULL, 0);
      )
      
      @change_timer_function_usage@
      expression _E;
      identifier _timer;
      struct timer_list _stl;
      identifier _callback;
      type _cast_func, _cast_data;
      @@
      
      (
      -setup_timer(&_E->_timer, _callback, _E);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, &_callback, _E);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, _callback, (_cast_data)_E);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, &_callback, (_cast_data)_E);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, (_cast_func)_callback, _E);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, (_cast_func)&_callback, _E);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E._timer, _callback, (_cast_data)_E);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, _callback, (_cast_data)&_E);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, &_callback, (_cast_data)_E);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, &_callback, (_cast_data)&_E);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E);
      +timer_setup(&_E._timer, _callback, 0);
      |
       _E->_timer@_stl.function = _callback;
      |
       _E->_timer@_stl.function = &_callback;
      |
       _E->_timer@_stl.function = (_cast_func)_callback;
      |
       _E->_timer@_stl.function = (_cast_func)&_callback;
      |
       _E._timer@_stl.function = _callback;
      |
       _E._timer@_stl.function = &_callback;
      |
       _E._timer@_stl.function = (_cast_func)_callback;
      |
       _E._timer@_stl.function = (_cast_func)&_callback;
      )
      
      // callback(unsigned long arg)
      @change_callback_handle_cast
       depends on change_timer_function_usage@
      identifier change_timer_function_usage._callback;
      identifier change_timer_function_usage._timer;
      type _origtype;
      identifier _origarg;
      type _handletype;
      identifier _handle;
      @@
      
       void _callback(
      -_origtype _origarg
      +struct timer_list *t
       )
       {
      (
      	... when != _origarg
      	_handletype *_handle =
      -(_handletype *)_origarg;
      +from_timer(_handle, t, _timer);
      	... when != _origarg
      |
      	... when != _origarg
      	_handletype *_handle =
      -(void *)_origarg;
      +from_timer(_handle, t, _timer);
      	... when != _origarg
      |
      	... when != _origarg
      	_handletype *_handle;
      	... when != _handle
      	_handle =
      -(_handletype *)_origarg;
      +from_timer(_handle, t, _timer);
      	... when != _origarg
      |
      	... when != _origarg
      	_handletype *_handle;
      	... when != _handle
      	_handle =
      -(void *)_origarg;
      +from_timer(_handle, t, _timer);
      	... when != _origarg
      )
       }
      
      // callback(unsigned long arg) without existing variable
      @change_callback_handle_cast_no_arg
       depends on change_timer_function_usage &&
                           !change_callback_handle_cast@
      identifier change_timer_function_usage._callback;
      identifier change_timer_function_usage._timer;
      type _origtype;
      identifier _origarg;
      type _handletype;
      @@
      
       void _callback(
      -_origtype _origarg
      +struct timer_list *t
       )
       {
      +	_handletype *_origarg = from_timer(_origarg, t, _timer);
      +
      	... when != _origarg
      -	(_handletype *)_origarg
      +	_origarg
      	... when != _origarg
       }
      
      // Avoid already converted callbacks.
      @match_callback_converted
       depends on change_timer_function_usage &&
                  !change_callback_handle_cast &&
      	    !change_callback_handle_cast_no_arg@
      identifier change_timer_function_usage._callback;
      identifier t;
      @@
      
       void _callback(struct timer_list *t)
       { ... }
      
      // callback(struct something *handle)
      @change_callback_handle_arg
       depends on change_timer_function_usage &&
      	    !match_callback_converted &&
                  !change_callback_handle_cast &&
                  !change_callback_handle_cast_no_arg@
      identifier change_timer_function_usage._callback;
      identifier change_timer_function_usage._timer;
      type _handletype;
      identifier _handle;
      @@
      
       void _callback(
      -_handletype *_handle
      +struct timer_list *t
       )
       {
      +	_handletype *_handle = from_timer(_handle, t, _timer);
      	...
       }
      
      // If change_callback_handle_arg ran on an empty function, remove
      // the added handler.
      @unchange_callback_handle_arg
       depends on change_timer_function_usage &&
      	    change_callback_handle_arg@
      identifier change_timer_function_usage._callback;
      identifier change_timer_function_usage._timer;
      type _handletype;
      identifier _handle;
      identifier t;
      @@
      
       void _callback(struct timer_list *t)
       {
      -	_handletype *_handle = from_timer(_handle, t, _timer);
       }
      
      // We only want to refactor the setup_timer() data argument if we've found
      // the matching callback. This undoes changes in change_timer_function_usage.
      @unchange_timer_function_usage
       depends on change_timer_function_usage &&
                  !change_callback_handle_cast &&
                  !change_callback_handle_cast_no_arg &&
      	    !change_callback_handle_arg@
      expression change_timer_function_usage._E;
      identifier change_timer_function_usage._timer;
      identifier change_timer_function_usage._callback;
      type change_timer_function_usage._cast_data;
      @@
      
      (
      -timer_setup(&_E->_timer, _callback, 0);
      +setup_timer(&_E->_timer, _callback, (_cast_data)_E);
      |
      -timer_setup(&_E._timer, _callback, 0);
      +setup_timer(&_E._timer, _callback, (_cast_data)&_E);
      )
      
      // If we fixed a callback from a .function assignment, fix the
      // assignment cast now.
      @change_timer_function_assignment
       depends on change_timer_function_usage &&
                  (change_callback_handle_cast ||
                   change_callback_handle_cast_no_arg ||
                   change_callback_handle_arg)@
      expression change_timer_function_usage._E;
      identifier change_timer_function_usage._timer;
      identifier change_timer_function_usage._callback;
      type _cast_func;
      typedef TIMER_FUNC_TYPE;
      @@
      
      (
       _E->_timer.function =
      -_callback
      +(TIMER_FUNC_TYPE)_callback
       ;
      |
       _E->_timer.function =
      -&_callback
      +(TIMER_FUNC_TYPE)_callback
       ;
      |
       _E->_timer.function =
      -(_cast_func)_callback;
      +(TIMER_FUNC_TYPE)_callback
       ;
      |
       _E->_timer.function =
      -(_cast_func)&_callback
      +(TIMER_FUNC_TYPE)_callback
       ;
      |
       _E._timer.function =
      -_callback
      +(TIMER_FUNC_TYPE)_callback
       ;
      |
       _E._timer.function =
      -&_callback;
      +(TIMER_FUNC_TYPE)_callback
       ;
      |
       _E._timer.function =
      -(_cast_func)_callback
      +(TIMER_FUNC_TYPE)_callback
       ;
      |
       _E._timer.function =
      -(_cast_func)&_callback
      +(TIMER_FUNC_TYPE)_callback
       ;
      )
      
      // Sometimes timer functions are called directly. Replace matched args.
      @change_timer_function_calls
       depends on change_timer_function_usage &&
                  (change_callback_handle_cast ||
                   change_callback_handle_cast_no_arg ||
                   change_callback_handle_arg)@
      expression _E;
      identifier change_timer_function_usage._timer;
      identifier change_timer_function_usage._callback;
      type _cast_data;
      @@
      
       _callback(
      (
      -(_cast_data)_E
      +&_E->_timer
      |
      -(_cast_data)&_E
      +&_E._timer
      |
      -_E
      +&_E->_timer
      )
       )
      
      // If a timer has been configured without a data argument, it can be
      // converted without regard to the callback argument, since it is unused.
      @match_timer_function_unused_data@
      expression _E;
      identifier _timer;
      identifier _callback;
      @@
      
      (
      -setup_timer(&_E->_timer, _callback, 0);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, _callback, 0L);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E->_timer, _callback, 0UL);
      +timer_setup(&_E->_timer, _callback, 0);
      |
      -setup_timer(&_E._timer, _callback, 0);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, _callback, 0L);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_E._timer, _callback, 0UL);
      +timer_setup(&_E._timer, _callback, 0);
      |
      -setup_timer(&_timer, _callback, 0);
      +timer_setup(&_timer, _callback, 0);
      |
      -setup_timer(&_timer, _callback, 0L);
      +timer_setup(&_timer, _callback, 0);
      |
      -setup_timer(&_timer, _callback, 0UL);
      +timer_setup(&_timer, _callback, 0);
      |
      -setup_timer(_timer, _callback, 0);
      +timer_setup(_timer, _callback, 0);
      |
      -setup_timer(_timer, _callback, 0L);
      +timer_setup(_timer, _callback, 0);
      |
      -setup_timer(_timer, _callback, 0UL);
      +timer_setup(_timer, _callback, 0);
      )
      
      @change_callback_unused_data
       depends on match_timer_function_unused_data@
      identifier match_timer_function_unused_data._callback;
      type _origtype;
      identifier _origarg;
      @@
      
       void _callback(
      -_origtype _origarg
      +struct timer_list *unused
       )
       {
      	... when != _origarg
       }
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      e99e88a9
  12. 09 Sep, 2017 1 commit
  13. 18 May, 2017 1 commit
  14. 17 Mar, 2017 2 commits
  15. 11 Oct, 2016 1 commit
  16. 23 Jul, 2016 1 commit
  17. 01 Oct, 2015 2 commits
  18. 20 Oct, 2014 1 commit
  19. 13 Nov, 2013 1 commit
  20. 13 Sep, 2013 1 commit
  21. 11 Sep, 2013 1 commit
  22. 20 Aug, 2013 1 commit
  23. 03 Jul, 2013 3 commits
  24. 01 May, 2013 2 commits
  25. 29 Apr, 2013 1 commit
  26. 28 Feb, 2013 2 commits
  27. 13 Feb, 2013 5 commits
  28. 19 Jan, 2013 1 commit
    • Joe Millenbach's avatar
      tty: Added a CONFIG_TTY option to allow removal of TTY · 4f73bc4d
      Joe Millenbach authored
      The option allows you to remove TTY and compile without errors. This
      saves space on systems that won't support TTY interfaces anyway.
      bloat-o-meter output is below.
      
      The bulk of this patch consists of Kconfig changes adding "depends on
      TTY" to various serial devices and similar drivers that require the TTY
      layer.  Ideally, these dependencies would occur on a common intermediate
      symbol such as SERIO, but most drivers "select SERIO" rather than
      "depends on SERIO", and "select" does not respect dependencies.
      
      bloat-o-meter output comparing our previous minimal to new minimal by
      removing TTY.  The list is filtered to not show removed entries with awk
      '$3 != "-"' as the list was very long.
      
      add/remove: 0/226 grow/shrink: 2/14 up/down: 6/-35356 (-35350)
      function                                     old     new   delta
      chr_dev_init                                 166     170      +4
      allow_signal                                  80      82      +2
      static.__warned                              143     142      -1
      disallow_signal                               63      62      -1
      __set_special_pids                            95      94      -1
      unregister_console                           126     121      -5
      start_kernel                                 546     541      -5
      register_console                             593     588      -5
      copy_from_user                                45      40      -5
      sys_setsid                                   128     120      -8
      sys_vhangup                                   32      19     -13
      do_exit                                     1543    1526     -17
      bitmap_zero                                   60      40     -20
      arch_local_irq_save                          137     117     -20
      release_task                                 674     652     -22
      static.spin_unlock_irqrestore                308     260     -48
      Signed-off-by: default avatarJoe Millenbach <jmillenbach@gmail.com>
      Reviewed-by: default avatarJamey Sharp <jamey@minilop.net>
      Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4f73bc4d