linux-kernel - Re: [PATCH v4 1/2] edac: Add an API for edac device to report for multiple errors

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Date:   Tue, 1 Oct 2019 06:56:58 +0000
From:   Robert Richter <rrichter@...vell.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     Hanna Hawa <hhhawa@...zon.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "james.morse@....com" <james.morse@....com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dwmw@...zon.co.uk" <dwmw@...zon.co.uk>,
        "benh@...zon.com" <benh@...zon.com>,
        "ronenk@...zon.com" <ronenk@...zon.com>,
        "talel@...zon.com" <talel@...zon.com>,
        "jonnyc@...zon.com" <jonnyc@...zon.com>,
        "hanochu@...zon.com" <hanochu@...zon.com>
Subject: Re: [PATCH v4 1/2] edac: Add an API for edac device to report for
 multiple errors

On 30.09.19 16:50:46, Borislav Petkov wrote:
> ----------------------------------------------------------------------
> On Mon, Sep 23, 2019 at 08:17:40PM +0100, Hanna Hawa wrote:
> > +void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
> > +			int inst_nr, int block_nr, const char *msg)
> > +{
> > +	__edac_device_handle_ce(edac_dev, 1, inst_nr, block_nr, msg);
> > +}
> > +EXPORT_SYMBOL_GPL(edac_device_handle_ce);
> 
> Eww, I don't like that: exporting the function *and* the __ counterpart.
> The user will get confused and that is unnecessary.

It is *not* the counterpart. The __* version already has the
additional count argument in. There are 2 patches:

1) introduce new function __edac_device_handle_ce/ue() including the
   *_count() inline functions, but keep the old symbols (note the
   count=1 parameter).

2) remove old symbol edac_device_handle_ce/ue() and replace it with an
   inline function to use the counterpart symbol too.

The first patch only adds functionality but keeps the abi. Thus it
makes a backport easier. The 2nd switches completely to the new
function.

-Robert