linux-kernel - Re: [RFC, PATCH 1/4] cleanup elf_core_dump(): remove ELF_CORE_EXTRA

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Message-ID: <2375c9f90912142358j24cc1bf8p2f696f56537befc6@mail.gmail.com>
Date:	Tue, 15 Dec 2009 15:58:58 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Daisuke HATAYAMA <d.hatayama@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	jdike@...toit.com, tony.luck@...el.com, mhiramat@...hat.com
Subject: Re: [RFC, PATCH 1/4] cleanup elf_core_dump(): remove ELF_CORE_EXTRA_* 
	macro

On Tue, Dec 15, 2009 at 10:41 AM, Daisuke HATAYAMA
<d.hatayama@...fujitsu.com> wrote:
> elf_core_dump() uses #ifdef and the corresponding macro for hiding
> _multiline_ logics in functions. This patch removes #ifdef and
> replaces ELF_CORE_EXTRA_* by corresponding functions. For
> architectures not implemeonting ELF_CORE_EXTRA_*, we use weak
> functions in order to reduce a range of modification.
>
> This cleanup is for my next patches, but I think this cleanup itself
> is worth doing regardless of my firnal purpose.
>
> Signed-off-by: Daisuke HATAYAMA <d.hatayama@...fujitsu.com>


Good patch! I like it!

Just one problem below.


> --- /dev/null
> +++ b/arch/um/sys-i386/elfcore.c
> @@ -0,0 +1,78 @@
> +#include <linux/elf.h>
> +#include <linux/fs.h>
> +#include <linux/mm.h>
> +
> +#include <asm/elf.h>
> +
> +static int dump_write(struct file *file, const void *addr, int nr)
> +{
> +       return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
> +}

We already have the same dump_write() in fs/binfmt_elf.c, can't we
reuse it? e.g. moving it to a header and make it staic inline.

Thanks!
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