linux-kernel - Re: [PATCH] riscv: replace deprecated scall with ecall

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Message-ID: <CAFP8O3JSaZ6D=nGoVu+-_t2HZBLX7M8wggALWKNWH=PnubY8yA@mail.gmail.com>
Date:   Tue, 13 Jun 2023 14:51:56 -0700
From:   Fangrui Song <maskray@...gle.com>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-riscv@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: replace deprecated scall with ecall

On Thu, May 11, 2023 at 3:41 PM Fangrui Song <maskray@...gle.com> wrote:
>
> On Sun, Apr 23, 2023 at 3:32 PM Fangrui Song <maskray@...gle.com> wrote:
> >
> > scall is a deprecated alias for ecall. ecall is used in several places,
> > so there is no assembler compatibility concern.
> >
> > Signed-off-by: Fangrui Song <maskray@...gle.com>
> > ---
> >  arch/riscv/kernel/entry.S             | 4 ++--
> >  arch/riscv/kernel/vdso/rt_sigreturn.S | 2 +-
> >  2 files changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S
> > index 99d38fdf8b18..2f51935612d1 100644
> > --- a/arch/riscv/kernel/entry.S
> > +++ b/arch/riscv/kernel/entry.S
> > @@ -191,7 +191,7 @@ handle_syscall:
> >         REG_S a0, PT_ORIG_A0(sp)
> >         /*
> >          * Advance SEPC to avoid executing the original
> > -        * scall instruction on sret
> > +        * ecall instruction on sret
> >          */
> >         addi s2, s2, 0x4
> >         REG_S s2, PT_EPC(sp)
> > @@ -603,6 +603,6 @@ END(excp_vect_table)
> >  #ifndef CONFIG_MMU
> >  ENTRY(__user_rt_sigreturn)
> >         li a7, __NR_rt_sigreturn
> > -       scall
> > +       ecall
> >  END(__user_rt_sigreturn)
> >  #endif
> > diff --git a/arch/riscv/kernel/vdso/rt_sigreturn.S b/arch/riscv/kernel/vdso/rt_sigreturn.S
> > index 0573705eac76..10438c7c626a 100644
> > --- a/arch/riscv/kernel/vdso/rt_sigreturn.S
> > +++ b/arch/riscv/kernel/vdso/rt_sigreturn.S
> > @@ -11,6 +11,6 @@ ENTRY(__vdso_rt_sigreturn)
> >         .cfi_startproc
> >         .cfi_signal_frame
> >         li a7, __NR_rt_sigreturn
> > -       scall
> > +       ecall
> >         .cfi_endproc
> >  ENDPROC(__vdso_rt_sigreturn)
> > --
> > 2.40.0.634.g4ca3ef3211-goog
> >
>
> Ping:)
>
>
> --
> 宋方睿

Ping^2 :)