On Tue, Aug 1, 2023, at 19:35, Christoph Hellwig wrote:

au1xmmc is split somewhat awkwardly into the main mmc subsystem driver,
and callbacks in platform_data that sit under arch/mips/ and are
always built in.  The latter than call mmc_detect_change through
symbol_get.  Remove the use of symbol_get by requiring the driver
to be built in.  In the future the interrupt handlers for card
insert/eject detection should probably be moved into the main driver,
and which point it can be built modular again.

Signed-off-by: Christoph Hellwig <hch@lst.de>

Good idea.

 	  of Alcor Micro PCI-E card reader

 config MMC_AU1X
-	tristate "Alchemy AU1XX0 MMC Card Interface support"
+	bool "Alchemy AU1XX0 MMC Card Interface support"
 	depends on MIPS_ALCHEMY
 	help

This needs a 

      depends on MMC=y

otherwise you get a link failure with CONFIG_MMC=m and
CONFIG_MMC_AU1X=y.

With that fixed,

Reviewed-by: Arnd Bergmann <arnd@arndb.de>