Re: [PATCH 24/31] mips/sgi-ip22: Use separate static data field with with static timer

From	Kees Cook <keescook@chromium.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 24/31] mips/sgi-ip22: Use separate static data field with with static timer
Date	2017-09-01 19:00 +0200
Message-ID	<ukXsu-7Iv-11@gated-at.bofh.it> (permalink)
References	<ukHe1-3XZ-3@gated-at.bofh.it> <ukHe4-3XZ-49@gated-at.bofh.it> <ukOfw-xa-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Aug 31, 2017 at 11:59 PM, Ralf Baechle <ralf@linux-mips.org> wrote:
> On Thu, Aug 31, 2017 at 04:29:36PM -0700, Kees Cook wrote:
>
>> In preparation for changing the timer callback argument to the timer
>> pointer, move to a separate static data variable.
>>
>> Cc: Ralf Baechle <ralf@linux-mips.org>
>> Cc: James Hogan <james.hogan@imgtec.com>
>> Cc: Ingo Molnar <mingo@kernel.org>
>> Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
>> Cc: linux-mips@linux-mips.org
>> Signed-off-by: Kees Cook <keescook@chromium.org>
>> ---
>>  arch/mips/sgi-ip22/ip22-reset.c | 16 ++++++++--------
>>  1 file changed, 8 insertions(+), 8 deletions(-)
>>
>> diff --git a/arch/mips/sgi-ip22/ip22-reset.c b/arch/mips/sgi-ip22/ip22-reset.c
>> index 196b041866ac..5cc32610e6d3 100644
>> --- a/arch/mips/sgi-ip22/ip22-reset.c
>> +++ b/arch/mips/sgi-ip22/ip22-reset.c
>> @@ -38,6 +38,7 @@
>>  #define PANIC_FREQ           (HZ / 8)
>>
>>  static struct timer_list power_timer, blink_timer, debounce_timer;
>> +static unsigned long blink_timer_timeout;
>
> You're removing power_timer and debounce_timer ...

Nope, I think you misread: this only adds blink_timer_timeout;

>
>>  #define MACHINE_PANICED              1
>>  #define MACHINE_SHUTTING_DOWN        2
>> @@ -86,13 +87,13 @@ static void power_timeout(unsigned long data)
>>       sgi_machine_power_off();
>>  }
>>
>> -static void blink_timeout(unsigned long data)
>> +static void blink_timeout(unsigned long unused)
>>  {
>>       /* XXX fix this for fullhouse  */
>>       sgi_ioc_reset ^= (SGIOC_RESET_LC0OFF|SGIOC_RESET_LC1OFF);
>>       sgioc->reset = sgi_ioc_reset;
>>
>> -     mod_timer(&blink_timer, jiffies + data);
>> +     mod_timer(&blink_timer, jiffies + blink_timer_timeout);
>>  }
>>
>>  static void debounce(unsigned long data)
>> @@ -128,8 +129,8 @@ static inline void power_button(void)
>>       }
>>
>>       machine_state |= MACHINE_SHUTTING_DOWN;
>> -     blink_timer.data = POWERDOWN_FREQ;
>> -     blink_timeout(POWERDOWN_FREQ);
>> +     blink_timer_timeout = POWERDOWN_FREQ;
>> +     blink_timeout(0);
>>
>>       setup_timer(&power_timer, power_timeout, 0UL);
>
> ... but don't remove the reference to power_timer nor use of debounce_timer.
>
>>       power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
>> @@ -169,8 +170,8 @@ static int panic_event(struct notifier_block *this, unsigned long event,
>>               return NOTIFY_DONE;
>>       machine_state |= MACHINE_PANICED;
>>
>> -     blink_timer.data = PANIC_FREQ;
>> -     blink_timeout(PANIC_FREQ);
>> +     blink_timer_timeout = PANIC_FREQ;
>> +     blink_timeout(0);
>>
>>       return NOTIFY_DONE;
>>  }
>> @@ -193,8 +194,7 @@ static int __init reboot_setup(void)
>>               return res;
>>       }
>>
>> -     init_timer(&blink_timer);
>> -     blink_timer.function = blink_timeout;
>> +     setup_timer(&blink_timer, blink_timeout, 0);
>>       atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
>>
>>       return 0;
>
>   Ralf

-Kees


-- 
Kees Cook
Pixel Security

Thread

[PATCH 00/31] struct timer_list callback argument conversion, step 1 Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 01/31] coccinelle: Improve setup_timer.cocci matching Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 16/31] usb/phy-isp1301-omap: Remove .data assignment Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 10/31] timer: Remove users of expire and data arguments to DEFINE_TIMER Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 04/31] timer: Remove init_timer_on_stack() in favor of setup_timer_on_stack() Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 15/31] timer: Additional init_timer() -> setup_timer() conversions Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 09/31] timer: Remove unused static initializer macros Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 08/31] timer: Remove users of TIMER_INITIALIZER Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 03/31] timer: Remove init_timer_pinned_deferrable() in favor of setup_pinned_deferrable_timer() Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 07/31] timer: Remove users of TIMER_DEFERRED_INITIALIZER Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 12/31] timer: Remove expires argument from __TIMER_INITIALIZER() Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 18/31] scsi/aic7xxx: Clean up timer usage Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 30/31] appletalk: Remove unneeded synchronization Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 06/31] timer: Remove init_timer_deferrable() in favor of setup_deferrable_timer() Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 11/31] timer: Remove expires and data arguments from DEFINE_TIMER Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
    Re: [PATCH 11/31] timer: Remove expires and data arguments from DEFINE_TIMER Geert Uytterhoeven <geert@linux-m68k.org> - 2017-09-01 09:30 +0200
  [PATCH 05/31] timer: Remove init_timer_pinned() in favor of setup_pinned_timer() Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 17/31] media/i2c/tc358743: Initialize timer Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
  [PATCH 24/31] mips/sgi-ip22: Use separate static data field with with static timer Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
    Re: [PATCH 24/31] mips/sgi-ip22: Use separate static data field with  with static timer Ralf Baechle <ralf@linux-mips.org> - 2017-09-01 09:10 +0200
      Re: [PATCH 24/31] mips/sgi-ip22: Use separate static data field with  with static timer Kees Cook <keescook@chromium.org> - 2017-09-01 19:00 +0200
    Re: [PATCH 24/31] mips/sgi-ip22: Use separate static data field with  with static timer Ralf Baechle <ralf@linux-mips.org> - 2017-09-02 01:00 +0200
  [PATCH 13/31] timer: Remove meaningless .data/.function assignments Kees Cook <keescook@chromium.org> - 2017-09-01 01:40 +0200
    Re: [PATCH 13/31] timer: Remove meaningless .data/.function  assignments Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-09-01 07:10 +0200
    Re: [PATCH 13/31] timer: Remove meaningless .data/.function assignments Krzysztof Halasa <khc@pm.waw.pl> - 2017-09-01 20:10 +0200
    Re: [PATCH 13/31] timer: Remove meaningless .data/.function  assignments Jens Axboe <axboe@kernel.dk> - 2017-09-01 22:10 +0200
  [PATCH 28/31] infiniband/rdmavt: Remove redundant timer initialization Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
  [PATCH 22/31] sparc/led: Use separate static data field with with static timer Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
  Re: [PATCH 31/31] timer: Switch to testing for .function instead of .data Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-09-01 01:50 +0200
    Re: [PATCH 31/31] timer: Switch to testing for .function instead of .data Kees Cook <keescook@chromium.org> - 2017-09-01 02:00 +0200
      Re: [PATCH 31/31] timer: Switch to testing for .function instead of .data Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-09-01 03:10 +0200
  [PATCH 23/31] mips/sgi-ip32: Use separate static data field with with static timer Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
    Re: [PATCH 23/31] mips/sgi-ip32: Use separate static data field with  with static timer Ralf Baechle <ralf@linux-mips.org> - 2017-09-01 09:10 +0200
    Re: [PATCH 23/31] mips/sgi-ip32: Use separate static data field with  with static timer Ralf Baechle <ralf@linux-mips.org> - 2017-09-02 01:00 +0200
  [PATCH 20/31] net/core: Collapse redundant sk_timer callback data assignments Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
  [PATCH 27/31] usb/gadget/snps_udc_core: Move timer initialization earlier Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
    Re: [PATCH 27/31] usb/gadget/snps_udc_core: Move timer initialization earlier Michal Nazarewicz <mina86@mina86.com> - 2017-09-03 23:20 +0200
      Re: [PATCH 27/31] usb/gadget/snps_udc_core: Move timer initialization earlier Kees Cook <keescook@chromium.org> - 2017-09-07 01:30 +0200
  [PATCH 21/31] s390/char/sclp: Use separate static data field with with static timer Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
  [PATCH 29/31] scsi/bnx2i: Initialize timer Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
  [PATCH 19/31] timer: Remove open-coded casts for .data and .function Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
    Re: [PATCH 19/31] timer: Remove open-coded casts for .data and  .function Tyrel Datwyler <tyreld@linux.vnet.ibm.com> - 2017-09-01 02:30 +0200
    Re: [PATCH 19/31] timer: Remove open-coded casts for .data and  .function Tyrel Datwyler <turtle.in.the.kernel@gmail.com> - 2017-09-01 02:30 +0200
  [PATCH 25/31] net/atm/mpc: Use separate static data field with with static timer Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
  [PATCH 31/31] timer: Switch to testing for .function instead of .data Kees Cook <keescook@chromium.org> - 2017-09-01 01:50 +0200
    Re: [PATCH 31/31] timer: Switch to testing for .function instead of  .data Jeff Kirsher <jeffrey.t.kirsher@intel.com> - 2017-09-01 23:40 +0200
    Re: [PATCH 31/31] timer: Switch to testing for .function instead of .data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-09-02 16:00 +0200

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