linux-kernel - RE: [PATCH v4 09/11] powerpc/perf: add support for the hv 24x7 interface

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6D0F6E93BC@AcuExch.aculab.com>
Date:	Wed, 26 Mar 2014 09:43:02 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'Cody P Schafer' <cody@...ux.vnet.ibm.com>,
	Anton Blanchard <anton@...ba.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Michael Ellerman <michael@...erman.id.au>,
	Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	"Arnaldo Carvalho de Melo" <acme@...stprotocols.net>,
	"scottwood@...escale.com" <scottwood@...escale.com>,
	Linux PPC <linuxppc-dev@...ts.ozlabs.org>
Subject: RE: [PATCH v4 09/11] powerpc/perf: add support for the hv 24x7
 interface

From: Cody P Schafer
> On 03/25/2014 03:43 AM, Anton Blanchard wrote:
> >
> > Hi Cody,
> >
> > hv-24x7: could not obtain capabilities, error 0x
> fffffffffffffffe, not enabling
> > hv-gpci: could not obtain capabilities, error 0x
> fffffffffffffffe, not enabling
> >
> >> +		pr_info("could not obtain capabilities, error 0x%80lx, not enabling\n",
> >
> > That's a lot of padding :)
> >
> > I think this should also be a pr_debug, considering this is not relevant
> > to most ppc64 boxes.
> 
> Yep, s/info/debug/ makes sense. The format should have been "%08lx" not
> "%80lx", not sure when I screwed that up.

Using "%#x" is an alternative - unless you really need fixed width.

However in this case "%ld" might be more appropriate!
If the value is a -ve errno one, maybe even "errno %d" and negate the value.

	David