linux-kernel - Re: [uClinux-dev] m68k compile issue with 4.0.5

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Message-ID: <557FCA17.6000703@uclinux.org>
Date:	Tue, 16 Jun 2015 17:02:47 +1000
From:	Greg Ungerer <gerg@...inux.org>
To:	uClinux development list <uclinux-dev@...inux.org>,
	Waldemar Brodkorb <wbx@...nadk.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [uClinux-dev] m68k compile issue with 4.0.5

Hi Waldemar,

On 16/06/15 16:24, Geert Uytterhoeven wrote:
> Hi Waldemar,
> 
> On Mon, Jun 15, 2015 at 10:23 PM, Waldemar Brodkorb <wbx@...nadk.org> wrote:
>> I am trying to build a M68K (Coldfire no-MMU) kernel for Qemu-system-m68k.
>>
>> With 4.0.4 everything is fine. With 4.0.5 I get following compile
>> error:
>>   adk-uclinux-gcc -Wp,-MD,mm/.nommu.o.d  -nostdinc -isystem
>> /home/wbx/m68k/toolchain_qemu-m68k_uclibc-ng_m68k_nommu/usr/lib/gcc/m68k-openadk-uclinux-uclibc/4.9.2/include
>> -I./arch/m68k/include -Iarch/m68k/include/generated/uapi
>> -Iarch/m68k/include/generated  -Iinclude -I./arch/m68k/include/uapi
>> -Iarch/m68k/include/generated/uapi -I./include/uapi
>> -Iinclude/generated/uapi -include ./include/linux/kconfig.h
>> -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs
>> -fno-strict-aliasing -fno-common
>> -Werror-implicit-function-declaration -Wno-format-security
>> -std=gnu89 -mcpu=5208 -pipe -DUTS_SYSNAME=\"uClinux\" -D__uClinux__
>> -fno-delete-null-pointer-checks -Os -Wno-maybe-uninitialized
>> --param=allow-store-data-races=0 -Wframe-larger-than=1024
>> -fno-stack-protector -Wno-unused-but-set-variable
>> -fomit-frame-pointer -fno-var-tracking-assignments
>> -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow
>> -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes
>> -Werror=date-time -DCC_HAVE_ASM_GOTO    -D"KBUILD_STR(s)=#s"
>> -D"KBUILD_BASENAME=KBUILD_STR(nommu)"
>> -D"KBUILD_MODNAME=KBUILD_STR(nommu)" -c -o mm/nommu.o mm/nommu.c
>> mm/nommu.c: In function 'delete_vma':
>> mm/nommu.c:861:3: error: implicit declaration of function 'vma_fput'
>> [-Werror=implicit-function-declaration]
>>    vma_fput(vma);
>>    ^
>> cc1: some warnings being treated as errors
>>
>> Any idea what change breaks the compile?
> 
> I tried a few m68knommu defconfigs, but can't reproduce it.
> 
> Is this a plain v4.0.5? I can't find the offending call to vma_fput().
> "git grep vma_fput" tells me there's no "vma_fput" in the kernel sources?

I don't have any compile (or runtime) problems with m5208evb_defconfig
on linux-4.0.5 either. That is close to what most people use with qemu.
What .config are you using?

Regards
Greg

> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
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