linux-kernel - Re: [PATCH 3/3] riscv: sbi: Fix undefined reference to sbi

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Date:   Fri, 17 Apr 2020 18:13:03 +0530
From:   Anup Patel <anup@...infault.org>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     Atish Patra <atish.patra@....com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH 3/3] riscv: sbi: Fix undefined reference to sbi_shutdown

On Fri, Apr 17, 2020 at 5:40 PM Kefeng Wang <wangkefeng.wang@...wei.com> wrote:
>
> There is no shutdown call in SBI v0.2, only set pm_power_off
> when RISCV_SBI_V01 enabled to fix following build error,
>
> riscv64-linux-ld: arch/riscv/kernel/sbi.o: in function `sbi_power_off':
> sbi.c:(.text+0xe): undefined reference to `sbi_shutdown
>
> Fixes: efca13989250 ("RISC-V: Introduce a new config for SBI v0.1")
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
> ---
>  arch/riscv/kernel/sbi.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
> index 62b10a16c8d7..f383ef5672b2 100644
> --- a/arch/riscv/kernel/sbi.c
> +++ b/arch/riscv/kernel/sbi.c
> @@ -167,6 +167,11 @@ static int __sbi_rfence_v01(int fid, const unsigned long *hart_mask,
>
>         return result;
>  }
> +
> +static void sbi_set_power_off(void)
> +{
> +       pm_power_off = sbi_shutdown;
> +}
>  #else
>  static void __sbi_set_timer_v01(uint64_t stime_value)
>  {
> @@ -191,6 +196,8 @@ static int __sbi_rfence_v01(int fid, const unsigned long *hart_mask,
>
>         return 0;
>  }
> +
> +static void sbi_set_power_off(void) {}
>  #endif /* CONFIG_RISCV_SBI_V01 */
>
>  static void __sbi_set_timer_v02(uint64_t stime_value)
> @@ -540,16 +547,12 @@ static inline long sbi_get_firmware_version(void)
>         return __sbi_base_ecall(SBI_EXT_BASE_GET_IMP_VERSION);
>  }
>
> -static void sbi_power_off(void)
> -{
> -       sbi_shutdown();
> -}
>
>  int __init sbi_init(void)
>  {
>         int ret;
>
> -       pm_power_off = sbi_power_off;
> +       sbi_set_power_off();
>         ret = sbi_get_spec_version();
>         if (ret > 0)
>                 sbi_spec_version = ret;
> --
> 2.20.1
>

Looks good to me.

Reviewed-by: Anup Patel <anup@...infault.org>

Regards,
Anup