linux-kernel - Re: [PATCH] libosd: Remove ignored _

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Date:   Thu, 1 Nov 2018 03:39:54 +0200
From:   Boaz Harrosh <ooo@...ctrozaur.com>
To:     Nathan Chancellor <natechancellor@...il.com>,
        Bart Van Assche <bvanassche@....org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] libosd: Remove ignored __weak attribute

On 26/10/18 00:31, Nathan Chancellor wrote:
> On Tue, Oct 02, 2018 at 04:06:31PM -0700, Bart Van Assche wrote:
<>
> 
> Hi Bart,
> 
> I'm sorry if I didn't follow the conclusion of this conversation properly
> but this is the below diff you were initially looking for, correct?
> 
> If so, Boaz and Nick, do you have any objections if this is v2? I'd like
> to get this patch accepted so the warning can be fixed for everyone.
> 

ACK on both the original and below code they will all work just fine.

I do like the original "just remove the _weak thingy". But this one
will work as well.

The "with extern" version suggested before is more cumbersome because it will
need an EXPORT_SYMBOL() but will also work.

The all use of osd_root_object is just. A properly C-types pointer to couple
of ZEROS. but since the Interface needs a pointer, those zeros need storage
somewhere. It does not matter where. (The value of the pointer is not used
only its content)

Do you need that I send a proper patch? Actually the original first patch
is the version I like. (And again all 3 approaches will work)

Thanks
Boaz

> Thanks,
> Nathan
> 
> ================================================================================
> 
> diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
> index e19fa883376f..4250f739beb3 100644
> --- a/drivers/scsi/osd/osd_initiator.c
> +++ b/drivers/scsi/osd/osd_initiator.c
> @@ -58,6 +58,8 @@
> 
>  enum { OSD_REQ_RETRIES = 1 };
> 
> +static const struct osd_obj_id osd_root_object;
> +
>  MODULE_AUTHOR("Boaz Harrosh <ooo@...ctrozaur.com>");
>  MODULE_DESCRIPTION("open-osd initiator library libosd.ko");
>  MODULE_LICENSE("GPL");
> diff --git a/drivers/scsi/osd/osd_uld.c b/drivers/scsi/osd/osd_uld.c
> index eaf36ccf58db..770c758baaa9 100644
> --- a/drivers/scsi/osd/osd_uld.c
> +++ b/drivers/scsi/osd/osd_uld.c
> @@ -73,6 +73,7 @@
> 
>  static const char osd_name[] = "osd";
>  static const char *osd_version_string = "open-osd 0.2.1";
> +static const struct osd_obj_id osd_root_object;
> 
>  MODULE_AUTHOR("Boaz Harrosh <ooo@...ctrozaur.com>");
>  MODULE_DESCRIPTION("open-osd Upper-Layer-Driver osd.ko");
> diff --git a/include/scsi/osd_types.h b/include/scsi/osd_types.h
> index 48e8a165e136..eb31357ec8b3 100644
> --- a/include/scsi/osd_types.h
> +++ b/include/scsi/osd_types.h
> @@ -28,8 +28,6 @@ struct osd_obj_id {
>         osd_id id;
>  };
> 
> -static const struct __weak osd_obj_id osd_root_object = {0, 0};
> -
>  struct osd_attr {
>         u32 attr_page;
>         u32 attr_id;
>