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

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Message-ID: <878vu6nftw.fsf@rustcorp.com.au>
Date:	Tue, 17 May 2011 13:22:59 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Alessio Igor Bogani <abogani@...nel.org>
Cc:	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>,
	Dirk Behme <dirk.behme@...glemail.com>,
	Alessio Igor Bogani <abogani@...nel.org>
Subject: Re: [PATCH] module: Use binary search in lookup_symbol()

On Mon, 16 May 2011 22:23:40 +0200, Alessio Igor Bogani <abogani@...nel.org> 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 |    6 ++----
>  1 files changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/kernel/module.c b/kernel/module.c
> index 6a34337..54355c5 100644
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@ -2055,10 +2055,8 @@ static const struct kernel_symbol *lookup_symbol(const char *name,
>  	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,

Applied.

Thanks!
Rusty.
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