clang-16 started warning about incompatible function pointers here: sound/pci/aw2/aw2-alsa.c:363:11: error: cast from 'void (*)(struct snd_pcm_substream *)' to 'snd_aw2_saa7146_it_cb' (aka 'void (*)(void *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 363 | (snd_aw2_saa7146_it_cb) | ^~~~~~~~~~~~~~~~~~~~~~~ 364 | snd_pcm_period_elapsed, | ~~~~~~~~~~~~~~~~~~~~~~ sound/pci/aw2/aw2-alsa.c:392:10: error: cast from 'void (*)(struct snd_pcm_substream *)' to 'snd_aw2_saa7146_it_cb' (aka 'void (*)(void *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 392 | (snd_aw2_saa7146_it_cb) | ^~~~~~~~~~~~~~~~~~~~~~~ 393 | snd_pcm_period_elapsed, | ~~~~~~~~~~~~~~~~~~~~~~ Add a forward declaration for struct snd_pcm_substrea to allow it to just use the correct prototype. Fixes: 98f2a97f207a ("[ALSA] Emagic Audiowerk 2 ALSA driver.") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20240213101327.460191-1-arnd@kernel.org Signed-off-by: Takashi Iwai <tiwai@suse.de>
Linux kernel ============ There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. The formatted documentation can also be read online at: https://www.kernel.org/doc/html/latest/ There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.
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