linux-kernel - Re: [PATCH 1/2] char/tpm: Remove duplicated lookup table

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Message-ID: <20121114221738.GB533@ennui.austin.ibm.com>
Date:	Wed, 14 Nov 2012 16:17:38 -0600
From:	Kent Yoder <key@...ux.vnet.ibm.com>
To:	Peter Huewe <peterhuewe@....de>
Cc:	Marcel Selhorst <tpmdd@...horst.net>, Sirrix AG <tpmdd@...rix.com>,
	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] char/tpm: Remove duplicated lookup table

On Mon, Nov 12, 2012 at 11:37:17PM +0100, Peter Huewe wrote:
> The entries in tpm_protected_ordinal_duration are exactly the same as
> the first 12 in tpm_ordinal_duration, so we can simply remove this one,
> and save some bytes.
> 
> This does not change the behavior of the driver.
> 
> Signed-off-by: Peter Huewe <peterhuewe@....de>

 Applied, thanks.

Kent

> ---
> This patch reflects only my opinion and work, 
> and is not related to my employer or anybody else.
> 
>  drivers/char/tpm/tpm.c |   18 +-----------------
>  1 files changed, 1 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
> index 93211df..9e3c529 100644
> --- a/drivers/char/tpm/tpm.c
> +++ b/drivers/char/tpm/tpm.c
> @@ -65,21 +65,6 @@ static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
>   * values of the SHORT, MEDIUM, and LONG durations are retrieved
>   * from the chip during initialization with a call to tpm_get_timeouts.
>   */
> -static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
> -	TPM_UNDEFINED,		/* 0 */
> -	TPM_UNDEFINED,
> -	TPM_UNDEFINED,
> -	TPM_UNDEFINED,
> -	TPM_UNDEFINED,
> -	TPM_UNDEFINED,		/* 5 */
> -	TPM_UNDEFINED,
> -	TPM_UNDEFINED,
> -	TPM_UNDEFINED,
> -	TPM_UNDEFINED,
> -	TPM_SHORT,		/* 10 */
> -	TPM_SHORT,
> -};
> -
>  static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
>  	TPM_UNDEFINED,		/* 0 */
>  	TPM_UNDEFINED,
> @@ -357,8 +342,7 @@ unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
>  	else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
>  		 TPM_MAX_PROTECTED_ORDINAL)
>  		duration_idx =
> -		    tpm_protected_ordinal_duration[ordinal &
> -						   TPM_PROTECTED_ORDINAL_MASK];
> +		    tpm_ordinal_duration[ordinal & TPM_PROTECTED_ORDINAL_MASK];
> 
>  	if (duration_idx != TPM_UNDEFINED)
>  		duration = chip->vendor.duration[duration_idx];
> -- 
> 1.7.8.6
> 

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