Commit 5e9615bf authored by Arnd Bergmann's avatar Arnd Bergmann Committed by David S. Miller

net: thunderx: add 64-bit dependency

The thunderx ethernet driver fails to build on architectures
that do not have an atomic readq() and writeq() function for
64-bit PCI bus access:

drivers/net/ethernet/cavium/thunder/thunder_bgx.c: In function 'bgx_reg_read':
include/asm-generic/io.h:195:23: error: implicit declaration of function 'readq' [-Werror=implicit-function-declaration]

It seems impossible to get this driver to work on most 32-bit
hardware, so it's better to add an explicit dependency, in
order to let us keep building 'allmodconfig' kernels on
all architectures.

As the driver is meant for the internal hardware on an arm64 SoC, this
is not a problem for usability. Allowing the build on all 64-bit
architectures rather than just CONFIG_ARM64 on the other hand means that
we get the benefit of build testing on x86.
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d9dca9cb
...@@ -4,7 +4,7 @@ ...@@ -4,7 +4,7 @@
config NET_VENDOR_CAVIUM config NET_VENDOR_CAVIUM
tristate "Cavium ethernet drivers" tristate "Cavium ethernet drivers"
depends on PCI depends on PCI && 64BIT
---help--- ---help---
Enable support for the Cavium ThunderX Network Interface Enable support for the Cavium ThunderX Network Interface
Controller (NIC). The NIC provides the controller and DMA Controller (NIC). The NIC provides the controller and DMA
......
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