On 2017/8/26 5:13, Thomas Gleixner wrote:
> On Fri, 25 Aug 2017, zhong jiang wrote:
>> From: zhong jiang
>> Date: Fri, 25 Aug 2017 12:05:56 +0800
>> Subject: [PATCH v2] futex: avoid undefined behaviour when shift exponent is
>> negative
> Please do not send patches without changing the subject li
On Fri, 25 Aug 2017, zhong jiang wrote:
> From: zhong jiang
> Date: Fri, 25 Aug 2017 12:05:56 +0800
> Subject: [PATCH v2] futex: avoid undefined behaviour when shift exponent is
> negative
Please do not send patches without changing the subject line so it's clear
that there is a new patch.
> us
On 2017/6/29 6:13, Thomas Gleixner wrote:
> On Wed, 28 Jun 2017, zhong jiang wrote:
>> On 2017/6/22 0:40, Ingo Molnar wrote:
>>> * zhong jiang wrote:
>>>
when shift expoment is negative, left shift alway zero. therefore, we
modify the logic to avoid the warining.
Signed-off-by:
On 2017/6/29 14:33, Thomas Gleixner wrote:
> On Thu, 29 Jun 2017, zhong jiang wrote:
>> On 2017/6/29 6:13, Thomas Gleixner wrote:
>>> That's simply wrong. If oparg is negative and the SHIFT bit is set then the
>>> result is undefined today and there is no way that this can be used at
>>> all.
>>>
>
On Thu, 29 Jun 2017, zhong jiang wrote:
> On 2017/6/29 6:13, Thomas Gleixner wrote:
> > That's simply wrong. If oparg is negative and the SHIFT bit is set then the
> > result is undefined today and there is no way that this can be used at
> > all.
> >
> > On x86:
> >
> >1 << -1 = 0x8000
>
On 2017/6/29 12:29, h...@zytor.com wrote:
> On June 28, 2017 7:12:04 PM PDT, zhong jiang wrote:
>> On 2017/6/29 5:43, h...@zytor.com wrote:
>>> On June 27, 2017 9:35:10 PM PDT, zhong jiang
>> wrote:
Hi, Ingo
Thank you for the comment.
On 2017/6/22 0:40, Ingo Molnar wrote:
>>>
On June 28, 2017 7:12:04 PM PDT, zhong jiang wrote:
>On 2017/6/29 5:43, h...@zytor.com wrote:
>> On June 27, 2017 9:35:10 PM PDT, zhong jiang
>wrote:
>>> Hi, Ingo
>>>
>>> Thank you for the comment.
>>> On 2017/6/22 0:40, Ingo Molnar wrote:
* zhong jiang wrote:
> when shift expomen
On 2017/6/29 5:43, h...@zytor.com wrote:
> On June 27, 2017 9:35:10 PM PDT, zhong jiang wrote:
>> Hi, Ingo
>>
>> Thank you for the comment.
>> On 2017/6/22 0:40, Ingo Molnar wrote:
>>> * zhong jiang wrote:
>>>
when shift expoment is negative, left shift alway zero. therefore,
>> we
mod
Hi, Thomas
Thank you for clarification.
On 2017/6/29 6:13, Thomas Gleixner wrote:
> On Wed, 28 Jun 2017, zhong jiang wrote:
>> On 2017/6/22 0:40, Ingo Molnar wrote:
>>> * zhong jiang wrote:
>>>
when shift expoment is negative, left shift alway zero. therefore, we
modify the logic to avo
On Wed, 28 Jun 2017, zhong jiang wrote:
> On 2017/6/22 0:40, Ingo Molnar wrote:
> > * zhong jiang wrote:
> >
> >> when shift expoment is negative, left shift alway zero. therefore, we
> >> modify the logic to avoid the warining.
> >>
> >> Signed-off-by: zhong jiang
> >> ---
> >> arch/x86/include
On June 27, 2017 9:35:10 PM PDT, zhong jiang wrote:
>Hi, Ingo
>
>Thank you for the comment.
>On 2017/6/22 0:40, Ingo Molnar wrote:
>> * zhong jiang wrote:
>>
>>> when shift expoment is negative, left shift alway zero. therefore,
>we
>>> modify the logic to avoid the warining.
>>>
>>> Signed-off-
Hi, Ingo
Thank you for the comment.
On 2017/6/22 0:40, Ingo Molnar wrote:
> * zhong jiang wrote:
>
>> when shift expoment is negative, left shift alway zero. therefore, we
>> modify the logic to avoid the warining.
>>
>> Signed-off-by: zhong jiang
>> ---
>> arch/x86/include/asm/futex.h | 8 +++
* zhong jiang wrote:
> when shift expoment is negative, left shift alway zero. therefore, we
> modify the logic to avoid the warining.
>
> Signed-off-by: zhong jiang
> ---
> arch/x86/include/asm/futex.h | 8 ++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86
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