linux-kernel - Re: [PATCH] module: Use binary search in lookup

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Message-ID: <4DD3E540.8000205@googlemail.com>
Date:	Wed, 18 May 2011 17:26:56 +0200
From:	Dirk Behme <dirk.behme@...glemail.com>
To:	Alessio Igor Bogani <abogani@...nel.org>
CC:	Rusty Russell <rusty@...tcorp.com.au>,
	Anders Kaseorg <andersk@...lice.com>,
	Tim Abbott <tabbott@...lice.com>,
	Tim Bird <tim.bird@...sony.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux Embedded <linux-embedded@...r.kernel.org>,
	Jason Wessel <jason.wessel@...driver.com>
Subject: Re: [PATCH] module: Use binary search in lookup_symbol()

On 17.05.2011 22:56, Alessio Igor Bogani wrote:
> This work was supported by a hardware donation from the CE Linux Forum.
>
> Signed-off-by: Alessio Igor Bogani<abogani@...nel.org>
> ---
>   kernel/module.c |    7 ++-----
>   1 files changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/kernel/module.c b/kernel/module.c
> index 1e2b657..795bdc7 100644
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@ -2055,11 +2055,8 @@ static const struct kernel_symbol *lookup_symbol(const char *name,
>   	const struct kernel_symbol *start,
>   	const struct kernel_symbol *stop)
>   {
> -	const struct kernel_symbol *ks = start;
> -	for (; ks<  stop; ks++)
> -		if (strcmp(ks->name, name) == 0)
> -			return ks;
> -	return NULL;
> +	return bsearch(name, start, stop - start,
> +			sizeof(struct kernel_symbol), cmp_name);
>   }
>
>   static int is_exported(const char *name, unsigned long value,

The old version with the warning is in linux-next now

http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=commitdiff;h=903996de9b35213aaa4162c24351a2cb2931d9ac

Best regards

Dirk
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