linux-kernel - Re: [PATCH] RISC-V: Remove unused code from STRICT_KERNEL

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Message-ID: <CAOnJCUJtnVjYwfaHbiUdO4SqPk8rY0q0uYckNJpQpc7jK0Pz7g@mail.gmail.com>
Date:   Tue, 5 May 2020 17:00:05 -0700
From:   Atish Patra <atishp@...shpatra.org>
To:     Palmer Dabbelt <palmer@...belt.com>
Cc:     Atish Patra <Atish.Patra@....com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <Anup.Patel@....com>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        Zong Li <zong.li@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        linux-riscv <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH] RISC-V: Remove unused code from STRICT_KERNEL_RWX

On Tue, May 5, 2020 at 4:55 PM Palmer Dabbelt <palmer@...belt.com> wrote:
>
> On Sun, 03 May 2020 21:03:19 PDT (-0700), Atish Patra wrote:
> > This patch removes the unused functions set_kernel_text_rw/ro.
> > Currently, it is not being invoked from anywhere and no other architecture
> > (except arm) uses this code. Even in ARM, these functions are not invoked
> > from anywhere currently.
> >
> > Fixes: d27c3c90817e ("riscv: add STRICT_KERNEL_RWX support")
> >
> > Signed-off-by: Atish Patra <atish.patra@....com>
> > ---
> >  arch/riscv/mm/init.c | 16 ----------------
> >  1 file changed, 16 deletions(-)
> >
> > diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
> > index b55be44ff9bd..ba60a581e9b6 100644
> > --- a/arch/riscv/mm/init.c
> > +++ b/arch/riscv/mm/init.c
> > @@ -501,22 +501,6 @@ static inline void setup_vm_final(void)
> >  #endif /* CONFIG_MMU */
> >
> >  #ifdef CONFIG_STRICT_KERNEL_RWX
> > -void set_kernel_text_rw(void)
> > -{
> > -     unsigned long text_start = (unsigned long)_text;
> > -     unsigned long text_end = (unsigned long)_etext;
> > -
> > -     set_memory_rw(text_start, (text_end - text_start) >> PAGE_SHIFT);
> > -}
> > -
> > -void set_kernel_text_ro(void)
> > -{
> > -     unsigned long text_start = (unsigned long)_text;
> > -     unsigned long text_end = (unsigned long)_etext;
> > -
> > -     set_memory_ro(text_start, (text_end - text_start) >> PAGE_SHIFT);
> > -}
> > -
> >  void mark_rodata_ro(void)
> >  {
> >       unsigned long text_start = (unsigned long)_text;
>
> Thanks, this is on fixes.  Are you going to remove the ARM code as well?
>

Yeah and also I realized that I forgot to remove the declarations from
the header file.
My bad. I will send out a v2. Please drop this one and take v2.

-- 
Regards,
Atish