linux-kernel - Re: [PATCH v2 06/12] powerpc/lib/code-patching: Make instr_is_branch_to

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Message-ID: <CACzsE9o+nuDEPk9ENig8_aAbLYLmpoWP8_JZKJWX=AqfOV2ODg@mail.gmail.com>
Date:   Tue, 15 Jun 2021 13:42:03 +1000
From:   Jordan Niethe <jniethe5@...il.com>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v2 06/12] powerpc/lib/code-patching: Make
 instr_is_branch_to_addr() static

On Thu, May 20, 2021 at 11:50 PM Christophe Leroy
<christophe.leroy@...roup.eu> wrote:
>
> instr_is_branch_to_addr() is only used in code-patching.c
>
> Make it static.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
> ---
>  arch/powerpc/include/asm/code-patching.h |  1 -
>  arch/powerpc/lib/code-patching.c         | 18 +++++++++---------
>  2 files changed, 9 insertions(+), 10 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/code-patching.h b/arch/powerpc/include/asm/code-patching.h
> index f1d029bf906e..f9bd1397b696 100644
> --- a/arch/powerpc/include/asm/code-patching.h
> +++ b/arch/powerpc/include/asm/code-patching.h
> @@ -59,7 +59,6 @@ static inline int modify_instruction_site(s32 *site, unsigned int clr, unsigned
>
>  int instr_is_relative_branch(struct ppc_inst instr);
>  int instr_is_relative_link_branch(struct ppc_inst instr);
> -int instr_is_branch_to_addr(const struct ppc_inst *instr, unsigned long addr);
>  unsigned long branch_target(const struct ppc_inst *instr);
>  int translate_branch(struct ppc_inst *instr, const struct ppc_inst *dest,
>                      const struct ppc_inst *src);
> diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c
> index 0308429b0d1a..82f2c1edb498 100644
> --- a/arch/powerpc/lib/code-patching.c
> +++ b/arch/powerpc/lib/code-patching.c
> @@ -367,15 +367,6 @@ unsigned long branch_target(const struct ppc_inst *instr)
>         return 0;
>  }
>
> -int instr_is_branch_to_addr(const struct ppc_inst *instr, unsigned long addr)
> -{
> -       if (instr_is_branch_iform(ppc_inst_read(instr)) ||
> -           instr_is_branch_bform(ppc_inst_read(instr)))
> -               return branch_target(instr) == addr;
> -
> -       return 0;
> -}
> -
>  int translate_branch(struct ppc_inst *instr, const struct ppc_inst *dest,
>                      const struct ppc_inst *src)
>  {
> @@ -410,6 +401,15 @@ void __patch_exception(int exc, unsigned long addr)
>
>  #ifdef CONFIG_CODE_PATCHING_SELFTEST
>
> +static int instr_is_branch_to_addr(const struct ppc_inst *instr, unsigned long addr)
> +{
> +       if (instr_is_branch_iform(ppc_inst_read(instr)) ||
> +           instr_is_branch_bform(ppc_inst_read(instr)))
> +               return branch_target(instr) == addr;
> +
> +       return 0;
> +}
> +
>  static void __init test_trampoline(void)
>  {
>         asm ("nop;\n");
> --
> 2.25.0
>
Reviewed by: Jordan Niethe <jniethe5@...il.com>