linux-kernel - ERROR: "bad_dma_ops" [drivers/tty/serial/stm32-usart.ko] undefined!

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Date:   Sun, 23 Oct 2016 17:54:47 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Alexandre TORGUE <alexandre.torgue@...com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Gerald Baeza <gerald.baeza@...com>
Subject: ERROR: "bad_dma_ops" [drivers/tty/serial/stm32-usart.ko] undefined!

Hi Alexandre,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0c2b6dc4fd4fa13796b319aae969a009f03222c6
commit: 3489187204eb75e5635d8836babfd0a18be613f4 serial: stm32: adding dma support
date:   4 weeks ago
config: m32r-allmodconfig (attached as .config)
compiler: m32r-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 3489187204eb75e5635d8836babfd0a18be613f4
        # save the attached .config to linux build tree
        make.cross ARCH=m32r 

All errors (new ones prefixed by >>):

   ERROR: "bad_dma_ops" [sound/soc/bcm/snd-soc-cygnus.ko] undefined!
   ERROR: "bad_dma_ops" [sound/core/snd-pcm.ko] undefined!
   ERROR: "dma_common_mmap" [sound/core/snd-pcm.ko] undefined!
>> ERROR: "bad_dma_ops" [drivers/tty/serial/stm32-usart.ko] undefined!

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