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

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Date:   Mon, 22 Feb 2021 17:52:08 -0800 (PST)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     atishp@...shpatra.org
CC:     linux@...ck-us.net, Atish Patra <Atish.Patra@....com>,
        wangkefeng.wang@...wei.com, aou@...s.berkeley.edu,
        Anup Patel <Anup.Patel@....com>, linux-kernel@...r.kernel.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        linux-riscv@...ts.infradead.org
Subject:     Re: [PATCH] RISC-V: Add a non-void return for sbi v02 functions

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.