linux-kernel - Re: [PATCH] powerpc/eeh: make eeh_ops structures _ro_after

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Date:   Fri, 13 Oct 2017 18:08:53 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Bhumika Goyal <bhumirks@...il.com>
cc:     ruscur@...sell.cc, benh@...nel.crashing.org, paulus@...ba.org,
        mpe@...erman.id.au, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/eeh: make eeh_ops structures _ro_after_init



On Fri, 13 Oct 2017, Bhumika Goyal wrote:

> These structures are passed to the eeh_ops_register function during the
> initialization phase. There they get stored in a structure variable
> which only makes function calls through function pointers. There is no
> other usage of these eeh_ops structures and their fields are never
> modified after init phase. So, make them __ro_after_init.

I think they could be const.

julia

> Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
> ---
>  arch/powerpc/platforms/powernv/eeh-powernv.c | 2 +-
>  arch/powerpc/platforms/pseries/eeh_pseries.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
> index 4650fb2..d2a53df 100644
> --- a/arch/powerpc/platforms/powernv/eeh-powernv.c
> +++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
> @@ -1731,7 +1731,7 @@ static int pnv_eeh_restore_config(struct pci_dn *pdn)
>  	return 0;
>  }
>
> -static struct eeh_ops pnv_eeh_ops = {
> +static struct eeh_ops pnv_eeh_ops __ro_after_init = {
>  	.name                   = "powernv",
>  	.init                   = pnv_eeh_init,
>  	.probe			= pnv_eeh_probe,
> diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c
> index 6b812ad..6fedfc9 100644
> --- a/arch/powerpc/platforms/pseries/eeh_pseries.c
> +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c
> @@ -684,7 +684,7 @@ static int pseries_eeh_write_config(struct pci_dn *pdn, int where, int size, u32
>  	return rtas_write_config(pdn, where, size, val);
>  }
>
> -static struct eeh_ops pseries_eeh_ops = {
> +static struct eeh_ops pseries_eeh_ops __ro_after_init = {
>  	.name			= "pseries",
>  	.init			= pseries_eeh_init,
>  	.probe			= pseries_eeh_probe,
> --
> 1.9.1
>
>