linux-kernel - Re: [PATCH 2/3] hexagon: Use common DISCARDS macro

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Message-ID: <CAKwvOd=T9HTUXETv2EJit0Qa8+p7NhTxcfZ3FYqy1xu--GNkgA@mail.gmail.com>
Date:   Tue, 1 Jun 2021 12:18:35 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Brian Cain <bcain@...eaurora.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "open list:QUALCOMM HEXAGON..." <linux-hexagon@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH 2/3] hexagon: Use common DISCARDS macro

On Thu, May 20, 2021 at 6:13 PM Nathan Chancellor <nathan@...nel.org> wrote:
>
> ld.lld warns that the '.modinfo' section is not currently handled:
>
> ld.lld: warning: kernel/built-in.a(workqueue.o):(.modinfo) is being placed in '.modinfo'
> ld.lld: warning: kernel/built-in.a(printk/printk.o):(.modinfo) is being placed in '.modinfo'
> ld.lld: warning: kernel/built-in.a(irq/spurious.o):(.modinfo) is being placed in '.modinfo'
> ld.lld: warning: kernel/built-in.a(rcu/update.o):(.modinfo) is being placed in '.modinfo'
>
> The '.modinfo' section was added in commit 898490c010b5 ("moduleparam:
> Save information about built-in modules in separate file") to the
> DISCARDS macro but Hexagon has never used that macro. The unification of
> DISCARDS happened in commit 023bf6f1b8bf ("linker script: unify usage of
> discard definition") in 2009, prior to Hexagon being added in 2011.
>
> Switch Hexagon over to the DISCARDS macro so that anything that is
> expected to be discarded gets discarded.
>
> Fixes: e95bf452a9e2 ("Hexagon: Add configuration and makefiles for the Hexagon architecture.")
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>

Thanks for the patch.
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>  arch/hexagon/kernel/vmlinux.lds.S | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
>
> diff --git a/arch/hexagon/kernel/vmlinux.lds.S b/arch/hexagon/kernel/vmlinux.lds.S
> index 20f19539c5fc..57465bff1fe4 100644
> --- a/arch/hexagon/kernel/vmlinux.lds.S
> +++ b/arch/hexagon/kernel/vmlinux.lds.S
> @@ -61,14 +61,9 @@ SECTIONS
>
>         _end = .;
>
> -       /DISCARD/ : {
> -               EXIT_TEXT
> -               EXIT_DATA
> -               EXIT_CALL
> -       }
> -
>         STABS_DEBUG
>         DWARF_DEBUG
>         ELF_DETAILS
>
> +       DISCARDS
>  }
> --
> 2.32.0.rc0
>


-- 
Thanks,
~Nick Desaulniers