linux-kernel - Re: [PATCH 5/7] modpost: mismatch_handler: retrieve tosym information only when needed.

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Message-ID: <20150318090906.GJ19131@chrystal.uk.oracle.com>
Date:	Wed, 18 Mar 2015 10:09:06 +0100
From:	Quentin Casasnovas <quentin.casasnovas@...cle.com>
To:	Quentin Casasnovas <quentin.casasnovas@...cle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Michal Marek <mmarek@...e.cz>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 5/7] modpost: mismatch_handler: retrieve tosym
 information only when needed.

Adding Rusty and Michal to CC.

On Tue, Mar 17, 2015 at 01:40:00PM +0100, Quentin Casasnovas wrote:
> Signed-off-by: Quentin Casasnovas <quentin.casasnovas@...cle.com>
> ---
>  scripts/mod/modpost.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index c69681e..bf0cf81 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -1432,16 +1432,17 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
>  	const char *tosym;
>  	const char *fromsym;
>  
> -	tosec = sec_name(elf, get_secindex(elf, sym));
>  	from = find_elf_symbol2(elf, r->r_offset, fromsec);
>  	fromsym = sym_name(elf, from);
> -	to = find_elf_symbol(elf, r->r_addend, sym);
> -	tosym = sym_name(elf, to);
>  
>  	if (!strncmp(fromsym, "reference___initcall",
>  		     sizeof("reference___initcall")-1))
>  		return;
>  
> +	tosec = sec_name(elf, get_secindex(elf, sym));
> +	to = find_elf_symbol(elf, r->r_addend, sym);
> +	tosym = sym_name(elf, to);
> +
>  	/* check whitelist - we may ignore it */
>  	if (secref_whitelist(mismatch,
>  			     fromsec, fromsym, tosec, tosym)) {
> -- 
> 2.0.5
> 
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