linux-kernel - Re: [PATCH v9 2/6] fpga: dfl: move dfl_device_id to mod

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Date:   Mon, 12 Oct 2020 10:27:15 +0800
From:   Xu Yilun <yilun.xu@...el.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     mdf@...nel.org, krzk@...nel.org, linux-fpga@...r.kernel.org,
        linux-kernel@...r.kernel.org, trix@...hat.com, lgoncalv@...hat.com,
        hao.wu@...el.com,
        Matthew Gerlach <matthew.gerlach@...ux.intel.com>,
        Russ Weight <russell.h.weight@...el.com>, yilun.xu@...el.com
Subject: Re: [PATCH v9 2/6] fpga: dfl: move dfl_device_id to mod_devicetable.h

On Sun, Oct 11, 2020 at 04:43:51PM +0200, Greg KH wrote:
> On Sat, Oct 10, 2020 at 03:09:49PM +0800, Xu Yilun wrote:
> > In order to support MODULE_DEVICE_TABLE() for dfl device driver, this
> > patch moves struct dfl_device_id to mod_devicetable.h
> > 
> > Signed-off-by: Xu Yilun <yilun.xu@...el.com>
> > Signed-off-by: Wu Hao <hao.wu@...el.com>
> > Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> > Signed-off-by: Russ Weight <russell.h.weight@...el.com>
> > Reviewed-by: Tom Rix <trix@...hat.com>
> > Acked-by: Wu Hao <hao.wu@...el.com>
> > Signed-off-by: Moritz Fischer <mdf@...nel.org>
> > ---
> > v2: fix the order for the header file
> > v3: rebase the patch for dfl bus name change
> > v9: rebase the patch for dfl bus name changes back to "dfl"
> > ---
> >  drivers/fpga/dfl.h              | 13 +------------
> >  include/linux/mod_devicetable.h | 12 ++++++++++++
> >  2 files changed, 13 insertions(+), 12 deletions(-)
> > 
> > diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
> > index ac373b1..549c790 100644
> > --- a/drivers/fpga/dfl.h
> > +++ b/drivers/fpga/dfl.h
> > @@ -22,6 +22,7 @@
> >  #include <linux/interrupt.h>
> >  #include <linux/iopoll.h>
> >  #include <linux/io-64-nonatomic-lo-hi.h>
> > +#include <linux/mod_devicetable.h>
> >  #include <linux/platform_device.h>
> >  #include <linux/slab.h>
> >  #include <linux/uuid.h>
> > @@ -526,18 +527,6 @@ enum dfl_id_type {
> >  };
> >  
> >  /**
> > - * struct dfl_device_id -  dfl device identifier
> > - * @type: DFL FIU type of the device. See enum dfl_id_type.
> > - * @feature_id: feature identifier local to its DFL FIU type.
> > - * @driver_data: driver specific data.
> > - */
> > -struct dfl_device_id {
> > -	u16 type;
> > -	u16 feature_id;
> > -	unsigned long driver_data;
> > -};
> > -
> > -/**
> >   * struct dfl_device - represent an dfl device on dfl bus
> >   *
> >   * @dev: generic device interface.
> > diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
> > index 5b08a47..66e1405 100644
> > --- a/include/linux/mod_devicetable.h
> > +++ b/include/linux/mod_devicetable.h
> > @@ -838,4 +838,16 @@ struct mhi_device_id {
> >  	kernel_ulong_t driver_data;
> >  };
> >  
> > +/**
> > + * struct dfl_device_id -  dfl device identifier
> 
> I still have no idea what "dfl" means.  Please at the very least,
> explain it here.

Yes, I will add the comments here.

Thanks,
Yilun

> 
> thanks,
> 
> greg k-h