lkml.org 
[lkml]   [2013]   [Apr]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
SubjectRe: [PATCH 1/2] smp: use '|=' for csd_lock
From
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?

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

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
>


\
 
 \ /
  Last update: 2013-04-22 08:41    [W:0.064 / U:2.688 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site