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Date:   Wed, 8 Jun 2022 12:02:29 +0200
From:   Jan Kara <>
Cc:     Jan Kara <>, Ted Tso <>
Subject: Re: [PATCH] jbd2: Remove unused exports for jbd2 debugging


yeah, I was grepping the sources whether I can see an external use of
jbd2_debug() and didn't notice the macro in include/linux/jbd2.h that is
calling __jbd2_debug() is actually called jbd_debug(). I actually think we
should use ext4_debug() instead of jbd_debug() in ext4 code but anyway,
my patches need tweaking...


On Wed 08-06-22 10:29:23, kernel test robot wrote:
> Hi Jan,
> I love your patch! Yet something to improve:
> [auto build test ERROR on tytso-ext4/dev]
> [also build test ERROR on linus/master v5.19-rc1 next-20220607]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> url:
> base: dev
> config: microblaze-buildonly-randconfig-r012-20220605 (
> compiler: microblaze-linux-gcc (GCC) 11.3.0
> reproduce (this is a W=1 build):
>         wget -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         #
>         git remote add linux-review
>         git fetch --no-tags linux-review Jan-Kara/jbd2-Remove-unused-exports-for-jbd2-debugging/20220606-224629
>         git checkout 9aaaac58ce0525ce441ad75b45bf3e5f3911a82b
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=microblaze SHELL=/bin/bash
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <>
> All errors (new ones prefixed by >>, old ones prefixed by <<):
> >> ERROR: modpost: "__jbd2_debug" [fs/ext4/ext4.ko] undefined!
> -- 
> 0-DAY CI Kernel Test Service
Jan Kara <>

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