[PATCH] arm: cacheflush: get rid of restarting block

[Vladimir Murzin]

On 27/11/14 10:43, Vladimir Murzin wrote:
> On 27/11/14 10:03, Will Deacon wrote:
>> On Thu, Nov 27, 2014 at 04:02:24AM +0000, Chanho Min wrote:
>>>> -----Original Message-----
>>>> From: Vladimir Murzin [mailto:vladimir.murzin at arm.com]
>>>> Sent: Wednesday, November 26, 2014 12:19 AM
>>>> To: linux-arm-kernel at lists.infradead.org; linux at arm.linux.org.uk
>>>> Cc: chanho.min at lge.com; will.deacon at arm.com; stable at vger.kernel.org
>>>> Subject: [PATCH] arm: cacheflush: get rid of restarting block
>>>>
>>>> We cannot restart cacheflush safely if a process provides user-defined
>>>> signal handler and signal is pending. In this case -EINTR is returned
>>>> and it is expected that process re-invokes syscall. However, there are
>>>> a few problems with that:
>>>>  * looks like nobody bothers checking return value from cacheflush
>>>>  * but if it did, we don't provide the restart address for that, so the
>>>>    process has to use the same range again
>>>>  * ...and again, what might lead to looping forever
>>>>
>>>> So, remove cacheflush restarting code and terminate cache flushing
>>>> as early as fatal signal is pending.
>>>>
>>>> Cc: stable at vger.kernel.org # 3.12+
>>>> Reported-by: Chanho Min <chanho.min at lge.com>
>>>> Signed-off-by: Vladimir Murzin <vladimir.murzin at arm.com>
>>>> Acked-by: Will Deacon <will.deacon at arm.com>
>>>> ---
>>>> Hi,
>>>>
>>>> There is my proposal for the problem reported in [1]. Since that
>>>> thread has not been progressing much, I'm addressing the problem in
>>>> separate patch.
>>>>
>>>> Comments?
>>> Thanks, We hope this to be applied.
>>
>> Ok, good. In which case, can you put it into the patch system please,
>> Vladimir?
> 
> Already in patch system as 8226/1.
> 
> Vladimir
> 

Sorry for banner - I should have checked that I use proper smtp server :(

Vladimir

>>
>> Will
>>
>>
>>
> 
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