EDAC, skx: Fix randconfig builds in a better way

It was previously noted that Kconfig complained about unmet dependencies
when trying to configure skx_edac together with CONFIG_ACPI=n. First fix
for

EDAC, skx: Fix randconfig builds in a better way

It was previously noted that Kconfig complained about unmet dependencies
when trying to configure skx_edac together with CONFIG_ACPI=n. First fix
for this checked for ACPI when doing

select ACPI_ADXL

but this required stub functions for the case where ACPI wasn't
selected. It also allowed building a driver that didn't actually work
for a system that has non-volatile DIMMs.

Arnd Bergmann pointed out that the right fix is to make EDAC_SKX
"depend on ACPI".

Fixes: a324e9396ca3 ("EDAC, skx: Fix randconfig builds")
Signed-off-by: Tony Luck <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
CC: "Rafael J. Wysocki" <[email protected]>
CC: Arnd Bergmann <[email protected]>
CC: Mauro Carvalho Chehab <[email protected]>
CC: linux-edac <[email protected]>
CC: [email protected]
Link: http://lkml.kernel.org/r/20181106183914.GA26731@agluck-desk

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EDAC, skx: Fix randconfig builds

The driver depends on the ADXL component glue and selects it. However,
ADXL itself implicitly depends on ACPI and in nonsensical randconfig
builds like this:

# CO

EDAC, skx: Fix randconfig builds

The driver depends on the ADXL component glue and selects it. However,
ADXL itself implicitly depends on ACPI and in nonsensical randconfig
builds like this:

# CONFIG_ACPI is not set
CONFIG_ACPI_ADXL=y

where ACPI is not enabled, the build fails with:

drivers/edac/skx_edac.o: In function `skx_mce_check_error':
skx_edac.c:(.text+0xab): undefined reference to `adxl_decode'
drivers/edac/skx_edac.o: In function `skx_init':
skx_edac.c:(.init.text+0x8bf): undefined reference to `adxl_get_component_names'
make: *** [vmlinux] Error 1

Add stubs for that case so that the build succeeds. CONFIG_ACPI=n
doesn't make any sense for real configurations but this fix will at
least silence randconfig builds.

Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Tony Luck <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>

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ACPI/ADXL: Add address translation interface using an ACPI DSM

Some new Intel servers provide an interface so that the OS can ask the
BIOS to translate a system physical address to a memory address

ACPI/ADXL: Add address translation interface using an ACPI DSM

Some new Intel servers provide an interface so that the OS can ask the
BIOS to translate a system physical address to a memory address (socket,
memory controller, channel, rank, dimm, etc.). This is useful for EDAC
drivers that want to take the address of an error reported in a machine
check bank and let the user know which DIMM may need to be replaced.

Specification for this interface is available at:

https://cdrdv2.intel.com/v1/dl/getContent/603354

[ Based on earlier code by Qiuxu Zhuo <[email protected]>. ]

[ bp: Make the first pr_info() in adxl_init() pr_debug() so that it
doesn't pollute every dmesg. ]

Signed-off-by: Tony Luck <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
Tested-by: Qiuxu Zhuo <[email protected]>
CC: Len Brown <[email protected]>
CC: [email protected]
CC: [email protected]
Link: http://lkml.kernel.org/r/[email protected]

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