From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH v6 01/14] eal: introduce atomic exchange
 operation
Date: Mon, 22 Jan 2018 13:48:53 -0800
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Cc: Ferruh Yigit <ferruh.yigit@intel.com>, chaozhu@linux.vnet.ibm.com,
 dev@dpdk.org, Bruce Richardson <bruce.richardson@intel.com>, Konstantin
 Ananyev <konstantin.ananyev@intel.com>, Jonas Pfefferle <pepperjo@japf.ch>
To: Thomas Monjalon <thomas@monjalon.net>
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On Mon, 22 Jan 2018 22:03:02 +0100
Thomas Monjalon <thomas@monjalon.net> wrote:

> 22/01/2018 17:56, Stephen Hemminger:
> > On Mon, 22 Jan 2018 00:50:55 +0100
> > Thomas Monjalon <thomas@monjalon.net> wrote:
> >   
> > > 21/01/2018 20:25, Ferruh Yigit:  
> > > > On 1/21/2018 6:59 PM, Ferruh Yigit wrote:    
> > > > > From: Stephen Hemminger <stephen@networkplumber.org>
> > > > > 
> > > > > To handle atomic update of link status (64 bit), every driver
> > > > > was doing its own version using cmpset.
> > > > > Atomic exchange is a useful primitive in its own right;
> > > > > therefore make it a EAL routine.
> > > > > 
> > > > > Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> > > > > Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>    
> > > > Series applied to dpdk-next-net/master, thanks.    
> > > 
> > > I need to drop this series when pulling in master,
> > > because PPC is not supported.
> > > 
> > > Chao, please could you help on this feature?
> > > Thanks  
> > 
> > The generic code should work for PPC.  
> 
> No, the generic code is inside #ifdef RTE_FORCE_INTRINSICS.
> PPC does not define RTE_FORCE_INTRINSICS,
> and ARM could disable it I guess.

I will add a non intrinsic generic version using cmpset.