linux-kernel - Re: [PATCH 1/6] staging: lustre: lustre: resolve "use spaces between elements" checkpatch errors

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Date:   Thu, 15 Jun 2017 10:04:46 -0700
From:   Joe Perches <joe@...ches.com>
To:     James Simmons <jsimmons@...radead.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org,
        Andreas Dilger <andreas.dilger@...el.com>,
        Oleg Drokin <oleg.drokin@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Lustre Development List <lustre-devel@...ts.lustre.org>
Subject: Re: [PATCH 1/6] staging: lustre: lustre: resolve "use spaces
 between elements" checkpatch errors

On Thu, 2017-06-15 at 17:57 +0100, James Simmons wrote:
> > On Thu, 2017-06-15 at 17:03 +0100, James Simmons wrote:
> > > > On Wed, 2017-06-14 at 11:01 -0400, James Simmons wrote:
> > > > > Due to the way the DFID was embedded in our debug strings checkpatch
> > > > > would report the following error:
> > > > 
> > > > unrelated trivia
> > > > 
> > > > > diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_user.h b/drivers/staging/lustre/lustre/include/lustre/lustre_user.h
> > > > 
> > > > []
> > > > > @@ -532,7 +532,7 @@ static inline void obd_uuid2fsname(char *buf, char *uuid, int buflen)
> > > > >  #define FID_NOBRACE_LEN 40
> > > > >  #define FID_LEN (FID_NOBRACE_LEN + 2)
> > > > >  #define DFID_NOBRACE "%#llx:0x%x:0x%x"
> > > > 
> > > > It's odd to use a mixture of %#x and 0x%x.
> > > > 
> > > > Using
> > > > 	#define DFID_NOBRACE "%#llx:%#x:%#x"
> > > > would also save a couple bytes per use.
> > > 
> > > Changing that format would break things very badly. This is used in user 
> > > land utilities and the kernel code. 
> > 
> > Really?  Why would anything break?
> 
> It shouldn't break anything but I'm paranoid.

Which is an entirely different thing than
writing "would break things very badly".

Paranoia is fine, incorrect statements of fact
like that less so.

> In the past I have change 
> "simple" things to have it blow up. I pushed the change to our test 
> harness just to make sure. 

Understandable.

cheers, Joe