arch/arm64/efi-stub.o rebuilding every time?

[Ard Biesheuvel]

On 3 July 2014 16:13, Will Deacon <will.deacon at arm.com> wrote:
> Hi guys,
>
> If I build an arm64 kernel, then simply hit make again without changing
> anything, I find that efi-stub.o is rebuilt every time (with an annoying
> warning too, but I think you already know about that):
>

Yep, I had noticed that as well. The reason is that it depends on
generated header files, which it shouldn't. There's already a patch
queued in Matt Fleming's tree for this:
https://git.kernel.org/cgit/linux/kernel/git/mfleming/efi.git/commit/?h=next&id=86b2eb8cdffda7eef07b1d6e5464491df1e86ee9

-- 
Ard.

>
> $ make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- -j8 Image
>   CHK     include/config/kernel.release
>   CHK     include/generated/uapi/linux/version.h
>   CHK     include/generated/utsrelease.h
>   CALL    scripts/checksyscalls.sh
>   CHK     include/generated/compile.h
>   CC      arch/arm64/kernel/efi-stub.o
> In file included from arch/arm64/kernel/efi-stub.c:44:0:
> arch/arm64/kernel/../../../drivers/firmware/efi/fdt.c: In function ‘update_fdt’:
> arch/arm64/kernel/../../../drivers/firmware/efi/fdt.c:66:22: warning: unused variable ‘name’ [-Wunused-variable]
>    const char *type, *name;
>                       ^
>   CHK     kernel/config_data.h
>   LD      arch/arm64/kernel/built-in.o
>   LINK    vmlinux
>   LD      vmlinux.o
>   MODPOST vmlinux.o
>   GEN     .version
>   CHK     include/generated/compile.h
>   UPD     include/generated/compile.h
>   CC      init/version.o
>   LD      init/built-in.o
>   KSYM    .tmp_kallsyms1.o
>   KSYM    .tmp_kallsyms2.o
>   LD      vmlinux
>   SORTEX  vmlinux
>   SYSMAP  System.map
>   OBJCOPY arch/arm64/boot/Image
>
>
> Does this actually need to be rebuilt, or is there a buggy Makefile
> somewhere?
>
> Will
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel