I ran into a link-time error with the atmel-quadspi driver on the EBSA110 platform:
drivers/mtd/built-in.o: In function `atmel_qspi_run_command': :(.text+0x1ee3c): undefined reference to `_memcpy_toio' :(.text+0x1ee48): undefined reference to `_memcpy_fromio'
The problem is that _memcpy_toio/_memcpy_fromio are not available on that platform, and we have to prevent building the driver there.
In case we want to backport this to older kernels: between linux-4.8 and linux-4.20, the Kconfig entry was in drivers/mtd/spi-nor/Kconfig but had the same problem.
Link: https://lore.kernel.org/patchwork/patch/812860/ Fixes: 161aaab8a067 ("mtd: atmel-quadspi: add driver for Atmel QSPI controller") Cc: stable@vger.kernel.org Signed-off-by: Arnd Bergmann arnd@arndb.de --- drivers/spi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 55d5ffb50750..9f89cb134549 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -93,7 +93,7 @@ config SPI_AT91_USART
config SPI_ATMEL_QUADSPI tristate "Atmel Quad SPI Controller" - depends on ARCH_AT91 || (ARM && COMPILE_TEST) + depends on ARCH_AT91 || (ARM && COMPILE_TEST && !ARCH_EBSA110) depends on OF && HAS_IOMEM help This enables support for the Quad SPI controller in master mode.