To: Greg Kroah-Hartman ; Måns Rullgård
>
> Cc: Christian Riesch ; Jiri Slaby
> ; linux-kernel@vger.kernel.org; sta...@vger.kernel.org
> Sent: Friday, November 7, 2014 8:45 AM
> Subject: Re: [PATCH] n_tty: Add memory barrier to fix race condition in
> receive path
>
> On 11/0
To: Greg Kroah-Hartman ; Måns Rullgård
Cc: Christian Riesch ; Jiri Slaby
; linux-kernel@vger.kernel.org; sta...@vger.kernel.org
Sent: Friday, November 7, 2014 8:45 AM
Subject: Re: [PATCH] n_tty: Add memory barrier to fix race condition in receive
path
On 11/06/2014 05:31 PM, Greg Kroah-Hartman
] n_tty: Add memory barrier to fix race condition in receive
path
On 11/06/2014 05:31 PM, Greg Kroah-Hartman wrote:
On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote
...@linuxfoundation.org; Måns Rullgård
m...@mansr.com
Cc: Christian Riesch christian.rie...@omicron.at; Jiri Slaby
jsl...@suse.cz; linux-kernel@vger.kernel.org; sta...@vger.kernel.org
Sent: Friday, November 7, 2014 8:45 AM
Subject: Re: [PATCH] n_tty: Add memory barrier to fix race condition in
receive path
Hi Måns,
On Mon, Nov 10, 2014 at 10:25 AM, Måns Rullgård wrote:
> Christian Riesch writes:
>
>> On Thu, Nov 6, 2014 at 9:56 PM, Greg Kroah-Hartman
>> wrote:
>>> On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg Kroah-Hartman writes:
> On Thu, Nov 06, 2014 at
Christian Riesch writes:
> On Thu, Nov 6, 2014 at 9:56 PM, Greg Kroah-Hartman
> wrote:
>> On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
>>> Greg Kroah-Hartman writes:
>>>
>>> > On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
>>> >> The current implementation
Christian Riesch christian.rie...@omicron.at writes:
On Thu, Nov 6, 2014 at 9:56 PM, Greg Kroah-Hartman
gre...@linuxfoundation.org wrote:
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 12:39:59PM
Hi Måns,
On Mon, Nov 10, 2014 at 10:25 AM, Måns Rullgård m...@mansr.com wrote:
Christian Riesch christian.rie...@omicron.at writes:
On Thu, Nov 6, 2014 at 9:56 PM, Greg Kroah-Hartman
gre...@linuxfoundation.org wrote:
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg
On Thu, Nov 6, 2014 at 9:56 PM, Greg Kroah-Hartman
wrote:
> On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
>> Greg Kroah-Hartman writes:
>>
>> > On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
>> >> The current implementation of put_tty_queue() causes a race
On Thu, Nov 6, 2014 at 9:56 PM, Greg Kroah-Hartman
gre...@linuxfoundation.org wrote:
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
The current
On 11/06/2014 05:31 PM, Greg Kroah-Hartman wrote:
> On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
>> Greg Kroah-Hartman writes:
>>
>>> On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
Greg Kroah-Hartman writes:
> On Thu, Nov 06, 2014 at 09:01:36PM
On 11/06/2014 05:31 PM, Greg Kroah-Hartman wrote:
On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu,
[sent again due to stupid HTML mail problems, sorry]
On Thu, Nov 6, 2014 at 11:54 PM, Måns Rullgård wrote:
> Greg Kroah-Hartman writes:
>
>> On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
>>> Greg Kroah-Hartman writes:
>>>
>>> > On Thu, Nov 06, 2014 at 09:38:59PM +, Måns
Greg Kroah-Hartman writes:
> On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
>> Greg Kroah-Hartman writes:
>>
>> > On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
>> >> Greg Kroah-Hartman writes:
>> >>
>> >> > On Thu, Nov 06, 2014 at 09:01:36PM +, Måns
On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
> Greg Kroah-Hartman writes:
>
> > On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
> >> Greg Kroah-Hartman writes:
> >>
> >> > On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
> >> >> Greg Kroah-Hartman
Greg Kroah-Hartman writes:
> On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
>> Greg Kroah-Hartman writes:
>>
>> > On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
>> >> Greg Kroah-Hartman writes:
>> >>
>> >> > On Thu, Nov 06, 2014 at 08:49:01PM +, Måns
On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
> Greg Kroah-Hartman writes:
>
> > On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
> >> Greg Kroah-Hartman writes:
> >>
> >> > On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
> >> >> Greg Kroah-Hartman
On Thu, Nov 6, 2014 at 9:56 PM, Greg Kroah-Hartman
wrote:
> On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
>> Greg Kroah-Hartman writes:
>>
>> > On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
>> >> The current implementation of put_tty_queue() causes a race
Greg Kroah-Hartman writes:
> On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
>> Greg Kroah-Hartman writes:
>>
>> > On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
>> >> Greg Kroah-Hartman writes:
>> >>
>> >> > On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian
On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
> Greg Kroah-Hartman writes:
>
> > On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
> >> Greg Kroah-Hartman writes:
> >>
> >> > On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
> >> >> The current
Greg Kroah-Hartman writes:
> On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
>> Greg Kroah-Hartman writes:
>>
>> > On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
>> >> The current implementation of put_tty_queue() causes a race condition
>> >> when re-arranged
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
> Greg Kroah-Hartman writes:
>
> > On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
> >> The current implementation of put_tty_queue() causes a race condition
> >> when re-arranged by the compiler.
> >>
> >> On my
Greg Kroah-Hartman writes:
> On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
>> The current implementation of put_tty_queue() causes a race condition
>> when re-arranged by the compiler.
>>
>> On my build with gcc 4.8.3, cross-compiling for ARM, the line
>>
>>
On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
> The current implementation of put_tty_queue() causes a race condition
> when re-arranged by the compiler.
>
> On my build with gcc 4.8.3, cross-compiling for ARM, the line
>
> *read_buf_addr(ldata, ldata->read_head++) = c;
The current implementation of put_tty_queue() causes a race condition
when re-arranged by the compiler.
On my build with gcc 4.8.3, cross-compiling for ARM, the line
*read_buf_addr(ldata, ldata->read_head++) = c;
was re-arranged by the compiler to something like
x =
On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
The current implementation of put_tty_queue() causes a race condition
when re-arranged by the compiler.
On my build with gcc 4.8.3, cross-compiling for ARM, the line
*read_buf_addr(ldata, ldata-read_head++) = c;
was
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
The current implementation of put_tty_queue() causes a race condition
when re-arranged by the compiler.
On my build with gcc 4.8.3, cross-compiling for ARM, the line
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
The current implementation of put_tty_queue() causes a race condition
when re-arranged by the compiler.
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
The current implementation of put_tty_queue() causes
On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 6, 2014 at 9:56 PM, Greg Kroah-Hartman
gre...@linuxfoundation.org wrote:
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 12:39:59PM +0100, Christian Riesch wrote:
The current
On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 08:49:01PM +, Måns
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:01:36PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:01:36PM +, Måns
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 09:38:59PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
[sent again due to stupid HTML mail problems, sorry]
On Thu, Nov 6, 2014 at 11:54 PM, Måns Rullgård m...@mansr.com wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
On Thu, Nov 06, 2014 at 10:12:54PM +, Måns Rullgård wrote:
Greg Kroah-Hartman gre...@linuxfoundation.org writes:
The current implementation of put_tty_queue() causes a race condition
when re-arranged by the compiler.
On my build with gcc 4.8.3, cross-compiling for ARM, the line
*read_buf_addr(ldata, ldata-read_head++) = c;
was re-arranged by the compiler to something like
x =
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