linux-kernel - Re: linux-next: Tree for Feb 6 (objtool warning)

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Message-ID: <20200206180407.vr5dyg2h73hmceh3@treble>
Date:   Thu, 6 Feb 2020 12:04:07 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: linux-next: Tree for Feb 6 (objtool warning)

On Thu, Feb 06, 2020 at 08:10:20AM -0800, Randy Dunlap wrote:
> On 2/5/20 8:09 PM, Stephen Rothwell wrote:
> > Hi all,
> > 
> > Please do not add any v5.7 material to your linux-next included
> > branches until after v5.6-rc1 has been released.
> > 
> > Changes since 20200205:
> > 
> 
> drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_set() falls through to next function ingenic_pinconf_group_set()

Thanks Randy.  I'm able to recreate with the config.  Objtool is
confused by the unreachable() statement in ingenic_pinconf_set().

I think a BUG() would be more appropriate anyway.  Will post a proper
patch.

diff --git a/drivers/pinctrl/pinctrl-ingenic.c b/drivers/pinctrl/pinctrl-ingenic.c
index 96f04d121ebd..6b61ac6cd4d2 100644
--- a/drivers/pinctrl/pinctrl-ingenic.c
+++ b/drivers/pinctrl/pinctrl-ingenic.c
@@ -2158,7 +2158,7 @@ static int ingenic_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 			break;
 
 		default:
-			unreachable();
+			BUG();
 		}
 	}