linux-kernel - Re: [PATCH] riscv: Fixup compile error with !MMU

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Message-ID: <CAJF2gTRiTqnDiWtqkOrJFxLDFHjwikSeREFWVSJH2uV_WpAz4g@mail.gmail.com>
Date:   Wed, 7 Dec 2022 22:01:15 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Conor Dooley <conor@...nel.org>
Cc:     palmer@...osinc.com, conor.dooley@...rochip.com,
        liaochang1@...wei.com, lizhengyu3@...wei.com,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org,
        Guo Ren <guoren@...ux.alibaba.com>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] riscv: Fixup compile error with !MMU

On Wed, Dec 7, 2022 at 5:32 PM Conor Dooley <conor@...nel.org> wrote:
>
> On Wed, Dec 07, 2022 at 04:11:12AM -0500, guoren@...nel.org wrote:
> > From: Guo Ren <guoren@...ux.alibaba.com>
> >
> > Current nommu_virt_defconfig can't compile:
> >
> > In file included from
> > arch/riscv/kernel/crash_core.c:3:
> > arch/riscv/kernel/crash_core.c:
> > In function 'arch_crash_save_vmcoreinfo':
> > arch/riscv/kernel/crash_core.c:8:27:
> > error: 'VA_BITS' undeclared (first use in this function)
> >     8 |         VMCOREINFO_NUMBER(VA_BITS);
> >       |                           ^~~~~~~
> >
> > Add MMU dependency for KEXEC_FILE.
> >
> > Fixes: 6261586e0c91 ("RISC-V: Add kexec_file support")
> > Reported-by: Conor Dooley <conor@...nel.org>
>
> FWIW (but certainly don't resend for this)
> s/conor@...nel.org/conor.dooley@...rochip.com
>
> Thanks for the quick fix, there's other issues w/ that config for me,
> but this fixed the kexec bits :)
> Tested-by: Conor Dooley <conor.dooley@...rochip.com>
Thx for the report and test.

>
> > Reported-by: kernel test robot <lkp@...el.com>
> > Signed-off-by: Guo Ren <guoren@...nel.org>
> > Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
> > ---
> >  arch/riscv/Kconfig | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> > index ef8d66de5f38..91319044fd13 100644
> > --- a/arch/riscv/Kconfig
> > +++ b/arch/riscv/Kconfig
> > @@ -496,7 +496,7 @@ config KEXEC_FILE
> >       select KEXEC_CORE
> >       select KEXEC_ELF
> >       select HAVE_IMA_KEXEC if IMA
> > -     depends on 64BIT
> > +     depends on 64BIT && MMU
> >       help
> >         This is new version of kexec system call. This system call is
> >         file based and takes file descriptors as system call argument
> > --
> > 2.36.1
> >



-- 
Best Regards
 Guo Ren