linux-kernel - Re: [PATCH] RISC-V: Add a non-void return for sbi v02 functions

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Date:   Mon, 22 Feb 2021 18:31:33 -0800
From:   Atish Patra <atishp@...shpatra.org>
To:     Palmer Dabbelt <palmer@...belt.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Atish Patra <Atish.Patra@....com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <Anup.Patel@....com>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        linux-riscv <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH] RISC-V: Add a non-void return for sbi v02 functions

On Mon, Feb 22, 2021 at 5:52 PM Palmer Dabbelt <palmer@...belt.com> wrote:
>
> On Mon, 22 Feb 2021 14:38:28 PST (-0800), atishp@...shpatra.org wrote:
> > On Mon, Feb 22, 2021 at 12:23 PM Guenter Roeck <linux@...ck-us.net> wrote:
> >>
> >> On Wed, Feb 03, 2021 at 09:26:43PM -0800, Atish Patra wrote:
> >> > SBI v0.2 functions can return an error code from SBI implementation.
> >> > We are already processing the SBI error code and coverts it to the Linux
> >> > error code.
> >> >
> >> > Propagate to the error code to the caller as well. As of now, kvm is the
> >> > only user of these error codes.
> >> >
> >> > Signed-off-by: Atish Patra <atish.patra@....com>
> >> > ---
> >> ...
> >> >  #else /* CONFIG_RISCV_SBI */
> >> > -static inline void sbi_remote_fence_i(const unsigned long *hart_mask) {}
> >> > +static inline int sbi_remote_fence_i(const unsigned long *hart_mask) {}
> >>
> >> Error log:
> >> In file included from arch/riscv/kernel/setup.c:29:
> >> arch/riscv/include/asm/sbi.h: In function 'sbi_remote_fence_i':
> >> arch/riscv/include/asm/sbi.h:150:1: error: no return statement in function returning non-void
> >>
> >
> > Sorry for the oversight. The return statement is missing.
> >
> > @Palmer Dabbelt : Can you fix it in for-next or should I send a v2 ?
>
> I just fixed it up.

Thanks!

-- 
Regards,
Atish