lkml.org 
[lkml]   [2013]   [Apr]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH 1/2] smp: use '|=' for csd_lock
From
On Mon, Apr 22, 2013 at 8:22 AM, li guang <lig.fnst@cn.fujitsu.com> wrote:
> 在 2013-04-22一的 08:18 +0200,Sedat Dilek写道:
>> On Mon, Apr 22, 2013 at 7:47 AM, liguang <lig.fnst@cn.fujitsu.com> wrote:
>> > originally, 'data->flags = CSD_FLAG_LOCK',
>> > and we use 'data->flags &= ~CSD_FLAG_LOCK'
>> > for csd_unlock, they are not symmetrix operations
>> > so use '|=' instead of '='.
>> > though, now data->flags only hold CSD_FLAG_LOCK,
>> > it's not so meaningful to use '|=' to set 1 bit,
>> > and '&= ~' to clear 1 bit.
>> >
>>
>> Hi,
>>
>> what's the reason I got CCed on this two patches? The ipc-sem-next
>> issue I reported?
>
> sorry,
> just use the result of scripts/get_maintainer.pl
>

Hmm, really this script memyselfandI as a result?

>>
>> Against what tree are those patches?
>> They are not compatible with Linux-Next (next-20130419).
>
> main
>

Andrew renamed data/csd,so it's only 1/2 needing a refresh.
Testing...

Regards,
- Sedat -

>>
>> Thanks.
>>
>> Regards,
>> - Sedat -
>>
>> [1] http://marc.info/?t=136631457900005&r=1&w=2
>>
>> > Signed-off-by: liguang <lig.fnst@cn.fujitsu.com>
>> > ---
>> > kernel/smp.c | 2 +-
>> > 1 files changed, 1 insertions(+), 1 deletions(-)
>> >
>> > diff --git a/kernel/smp.c b/kernel/smp.c
>> > index 1818dc0..2d5deb4 100644
>> > --- a/kernel/smp.c
>> > +++ b/kernel/smp.c
>> > @@ -109,7 +109,7 @@ static void csd_lock_wait(struct call_single_data *data)
>> > static void csd_lock(struct call_single_data *data)
>> > {
>> > csd_lock_wait(data);
>> > - data->flags = CSD_FLAG_LOCK;
>> > + data->flags |= CSD_FLAG_LOCK;
>> >
>> > /*
>> > * prevent CPU from reordering the above assignment
>> > --
>> > 1.7.2.5
>> >
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2013-04-22 08:41    [W:0.040 / U:0.700 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site