linux-kernel - Re: linux-next: manual merge of the edac-amd tree with the edac tree

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Date:   Thu, 1 Dec 2016 10:06:17 -0200
From:   Mauro Carvalho Chehab <mchehab@....samsung.com>
To:     Borislav Petkov <bp@...en8.de>,
        Yazen Ghannam <Yazen.Ghannam@....com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: manual merge of the edac-amd tree with the edac
 tree

Em Thu, 1 Dec 2016 11:48:46 +0100
Borislav Petkov <bp@...en8.de> escreveu:

> On Wed, Nov 30, 2016 at 08:50:13AM -0200, Mauro Carvalho Chehab wrote:
> > Fixed. If you have a stable branch, I can rebase it on the top
> > of your patches, in order to avoid the confict at linux-next.
> 
> http://git.kernel.org/cgit/linux/kernel/git/bp/bp.git/log/?h=for-next

Thanks!

> but with that fixed, shouldn't the merge work without a conflict?

Well, we're removing some lines from one file and adding them on another
one. Git is not smart enough to solve such conflicts automatically:

	CONFLICT (content): Merge conflict in drivers/edac/edac_mc.c
	Recorded preimage for 'drivers/edac/edac_mc.c'
	Automatic merge failed; fix conflicts and then commit the result.

Anyway, I rebased my work on the top of your branch. The conflict
is now gone:

	https://git.kernel.org/cgit/linux/kernel/git/mchehab/linux-edac.git/log/?h=linux_next

You can see the generated documentation at:
	https://mchehab.fedorapeople.org/kernel_docs/admin-guide/ras.html
	(user and admin guide)
and:
	https://mchehab.fedorapeople.org/kernel_docs/driver-api/edac.html
	(kernel API)

However, rebasing over your tree showed a new documentation gap:
	./include/linux/edac.h:144: warning: Enum value 'HW_EVENT_ERR_DEFERRED' not described in enum 'hw_event_mc_err_type'

With was introduced by this commit:

  commit d12a969ebbfcfc25853c4147d42b388f758e8784
  Author: Yazen Ghannam <Yazen.Ghannam@....com>
  Date:   Thu Nov 17 17:57:32 2016 -0500

    EDAC, amd64: Add Deferred Error type
    
    Currently, deferred errors are classified as correctable in EDAC. Add a
    new error type for deferred errors so that they are correctly reported
    to the user.
    
    Signed-off-by: Yazen Ghannam <Yazen.Ghannam@....com>
    Cc: Aravind Gopalakrishnan <aravindksg.lkml@...il.com>
    Cc: linux-edac <linux-edac@...r.kernel.org>
    Link: http://lkml.kernel.org/r/1479423463-8536-7-git-send-email-Yazen.Ghannam@amd.com
    Signed-off-by: Borislav Petkov <bp@...e.de>


Yazen introduced a "deferred error" code (whatever it means), but didn't
document what's that. Unfortunately, the patch description is also
not clear enough about what a "deferred error" means or how userspace
is supposed to handle it.

Yazen,

Could you please send us a patch adding a proper description for this
new error code?

Thanks!
Mauro