On 3/29/2013 11:30 PM, Luck, Tony wrote:
Fengguang Wu's 0-Day kernel build testing backend found the
following build error for an allmodconfig build on ia64:
drivers/built-in.o: In function `show_yoffset':
bgrt.c:(.text+0xe5a71): undefined reference to `bgrt_tab'
bgrt.c:(.text+0xe5a91): undefined reference to `bgrt_tab'
drivers/built-in.o: In function `show_xoffset':
bgrt.c:(.text+0xe5b51): undefined reference to `bgrt_tab'
bgrt.c:(.text+0xe5b71): undefined reference to `bgrt_tab'
drivers/built-in.o: In function `show_type':
bgrt.c:(.text+0xe5c31): undefined reference to `bgrt_tab'
drivers/built-in.o:bgrt.c:(.text+0xe5c51): more undefined references to `bgrt_tab' follow
drivers/built-in.o: In function `bgrt_init':
bgrt.c:(.init.text+0x8931): undefined reference to `bgrt_image'
bgrt.c:(.init.text+0x8932): undefined reference to `bgrt_image_size'
bgrt.c:(.init.text+0x8950): undefined reference to `bgrt_image'
bgrt.c:(.init.text+0x8960): undefined reference to `bgrt_image_size'
The problem is that all these undefined names are provided by
arch/x86/platform/efi/efi-bgrt.c - which is obviously not available
to the ia64 build.
It doesn't seem useful to provide the BGRT support for Itanium
(many systems are headless and have no graphics at all). So
just don't let users configure this driver on non-X86 machines.
Reported-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Acked-by: H. Peter Anvin <hpa@xxxxxxxxx>
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
I'd take it, but it didn't seem to make it to the list for some obscure
reason and I'd prefer it to show up there before it shows up in my tree.
Let's see if my reply makes it.
Thanks,
Rafael
---
drivers/acpi/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 4fc0ffc..8fcae6d 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -395,7 +395,7 @@ config ACPI_CUSTOM_METHOD
config ACPI_BGRT
bool "Boottime Graphics Resource Table support"
- depends on EFI
+ depends on EFI && X86
help
This driver adds support for exposing the ACPI Boottime Graphics
Resource Table, which allows the operating system to obtain
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