linux-kernel - Re: [PATCH v2] scripts/setlocalversion: fix a bug when LOCALVERSION is empty

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Date:   Mon, 12 Jul 2021 21:16:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Mikulas Patocka <mpatocka@...hat.com>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Nico Schottelius <nico-linuxsetlocalversion@...ottelius.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] scripts/setlocalversion: fix a bug when LOCALVERSION
 is empty

On Mon, Jul 12, 2021 at 03:06:48PM -0400, Mikulas Patocka wrote:
> 
> 
> On Mon, 12 Jul 2021, Greg Kroah-Hartman wrote:
> 
> > On Mon, Jul 12, 2021 at 10:00:59AM -0400, Mikulas Patocka wrote:
> > > The patch 042da426f8ebde012be9429ff705232af7ad7469 
> > > ("scripts/setlocalversion: simplify the short version part") reduces the 
> > > indentation. Unfortunatelly, it also changes behavior in a subtle way - if 
> > > the user has empty "LOCALVERSION" variable, the plus sign is appended to 
> > > the kernel version. It wasn't appended before.
> > > 
> > > This patch reverts to the old behavior - we append the plus sign only if
> > > the LOCALVERSION variable is not set.
> > > 
> > > Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>
> > > Fixes: 042da426f8eb ("scripts/setlocalversion: simplify the short version part")
> > > 
> > > ---
> > >  scripts/setlocalversion |    2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > Index: linux-2.6/scripts/setlocalversion
> > > ===================================================================
> > > --- linux-2.6.orig/scripts/setlocalversion	2021-07-12 15:29:07.000000000 +0200
> > > +++ linux-2.6/scripts/setlocalversion	2021-07-12 15:50:29.000000000 +0200
> > > @@ -131,7 +131,7 @@ res="${res}${CONFIG_LOCALVERSION}${LOCAL
> > >  if test "$CONFIG_LOCALVERSION_AUTO" = "y"; then
> > >  	# full scm version string
> > >  	res="$res$(scm_version)"
> > > -elif [ -z "${LOCALVERSION}" ]; then
> > > +elif [ "${LOCALVERSION+set}" != "set" ]; then
> > 
> > That's really subtle, can you add a comment here that this handles an
> > empty file?
> > 
> > thanks,
> > 
> > greg k-h
> 
> OK.
> 
> 
> From: Mikulas Patocka <mpatocka@...hat.com>
> 

I can't take a patch like this :(

> The patch 042da426f8ebde012be9429ff705232af7ad7469
> ("scripts/setlocalversion: simplify the short version part") reduces

Properly quote commits, the documentation says you do not need to use
the full sha1.


> indentation. Unfortunatelly, it also changes behavior in a subtle way - if
> the user has empty "LOCALVERSION" variable, the plus sign is appended to
> the kernel version. It wasn't appended before.
> 
> This patch reverts to the old behavior - we append the plus sign only if
> the LOCALVERSION variable is not set.
> 
> Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>
> Fixes: 042da426f8eb ("scripts/setlocalversion: simplify the short version part")

See, use that way to quote a commit.

thanks,

greg k-h