htmldocs: Documentation/sound/kernel-api/writing-an-alsa-driver.rst:3997: WARNING: Literal block expected; none found.

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   865fdb08197e657c59e74a35fa32362b12397f58
commit: 4d421eebe1465d94b95867dd025385dc3d661f9b ALSA: docs: writing-an-alsa-driver.rst: polishing
date:   11 days ago
reproduce:
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4d421eebe1465d94b95867dd025385dc3d661f9b
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 4d421eebe1465d94b95867dd025385dc3d661f9b
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        make htmldocs

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202305021822.4U6XOvGf-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> Documentation/sound/kernel-api/writing-an-alsa-driver.rst:3997: WARNING: Literal block expected; none found.
>> Documentation/sound/kernel-api/writing-an-alsa-driver.rst:4009: WARNING: Unexpected indentation.

vim +3997 Documentation/sound/kernel-api/writing-an-alsa-driver.rst

7ddedebb03b7ec Takashi Iwai       2016-09-29  3994  
4d421eebe1465d Oswald Buddenhagen 2023-04-21  3995     Suppose you have a file xyz.c. Add the following two lines::
7ddedebb03b7ec Takashi Iwai       2016-09-29  3996  
7ddedebb03b7ec Takashi Iwai       2016-09-29 @3997    snd-xyz-objs := xyz.o
7ddedebb03b7ec Takashi Iwai       2016-09-29  3998    obj-$(CONFIG_SND_XYZ) += snd-xyz.o
7ddedebb03b7ec Takashi Iwai       2016-09-29  3999  
7ddedebb03b7ec Takashi Iwai       2016-09-29  4000  2. Create the Kconfig entry
7ddedebb03b7ec Takashi Iwai       2016-09-29  4001  
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4002     Add the new entry of Kconfig for your xyz driver::
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4003  
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4004    config SND_XYZ
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4005      tristate "Foobar XYZ"
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4006      depends on SND
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4007      select SND_PCM
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4008      help
4d421eebe1465d Oswald Buddenhagen 2023-04-21 @4009        Say Y here to include support for Foobar XYZ soundcard.
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4010        To compile this driver as a module, choose M here:
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4011        the module will be called snd-xyz.
4d421eebe1465d Oswald Buddenhagen 2023-04-21  4012  

:::::: The code at line 3997 was first introduced by commit
:::::: 7ddedebb03b7ec030c528ebacdd43e45373476e3 ALSA: doc: ReSTize writing-an-alsa-driver document

:::::: TO: Takashi Iwai <tiwai@xxxxxxx>
:::::: CC: Takashi Iwai <tiwai@xxxxxxx>

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