linux-kernel - Re: drivers/tty/serial/pmac_zilog.c:255:36: sparse: sparse: context imbalance in 'pmz_receive_chars'

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Message-ID: <20200723123724.GN3634@localhost>
Date:   Thu, 23 Jul 2020 14:37:24 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Johan Hovold <johan@...nel.org>, kernel test robot <lkp@...el.com>,
        kbuild-all@...ts.01.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Dmitry Safonov <0x7f454c46@...il.com>
Subject: Re: drivers/tty/serial/pmac_zilog.c:255:36: sparse: sparse: context
 imbalance in 'pmz_receive_chars' - unexpected unlock

On Thu, Jul 23, 2020 at 03:26:54PM +0300, Andy Shevchenko wrote:
> On Thu, Jul 23, 2020 at 3:19 PM Johan Hovold <johan@...nel.org> wrote:
> >
> > On Thu, Jul 23, 2020 at 05:29:14PM +0800, kernel test robot wrote:
> > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > > head:   d15be546031cf65a0fc34879beca02fd90fe7ac7
> > > commit: 08d5470308ac3598e7709d08b8979ce6e9de8da2 serial: core: fix sysrq overhead regression
> > > date:   4 weeks ago
> > > config: m68k-randconfig-s032-20200723 (attached as .config)
> > > compiler: m68k-linux-gcc (GCC) 9.3.0
> > > reproduce:
> > >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> > >         chmod +x ~/bin/make.cross
> > >         # apt-get install sparse
> > >         # sparse version: v0.6.2-93-g4c6cbe55-dirty
> > >         git checkout 08d5470308ac3598e7709d08b8979ce6e9de8da2
> > >         # save the attached .config to linux build tree
> > >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k
> > >
> > > If you fix the issue, kindly add following tag as appropriate
> > > Reported-by: kernel test robot <lkp@...el.com>
> > >
> > >
> > > sparse warnings: (new ones prefixed by >>)
> > >
> > > >> drivers/tty/serial/pmac_zilog.c:255:36: sparse: sparse: context imbalance in 'pmz_receive_chars' - unexpected unlock
> >
> > This warning is far from new,
> 
> I suspect it's a new sparse and kbuildbot that decided to unveil old sins.

Possibly.

> > but let's add the missing annotation
> > nonetheless:
> >
> >         https://lore.kernel.org/r/20200723121423.24217-1-johan@kernel.org
> 
> Feel free to add Reviewed-by: Andy Shevchenko
> <andy.shevchenko@...il.com> to them.

Thanks, and sorry I missed this before sending a v2 with the missing
ampersands added. It's better if you reply to the cover letter so Greg's
tooling will pick it up:

	https://lore.kernel.org/r/20200723123327.5843-1-johan@kernel.org

Johan