linux-kernel - RE: [PATCH 3/4] memory: jz4780-nemc: Reduce size of const array

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Message-Id: <1535028777.27779.1@crapouillou.net>
Date:   Thu, 23 Aug 2018 14:52:57 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alex Smith <alex@...x-smith.me.uk>, "od@...c.me" <od@...c.me>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 3/4] memory: jz4780-nemc: Reduce size of const array

Hi David,

Le jeu. 23 août 2018 à 12:41, David Laight <David.Laight@...LAB.COM> 
a écrit :
> From: Paul Cercueil
>>  Sent: 22 August 2018 18:30
>>  The maximum value found in that array is 15, there's no need to 
>> store
>>  these values as uint32_t, a uint8_t is enough.
>> 
>>  Signed-off-by: Paul Cercueil <paul@...pouillou.net>
>>  ---
>>   drivers/memory/jz4780-nemc.c | 6 +++---
>>   1 file changed, 3 insertions(+), 3 deletions(-)
>> 
>>  diff --git a/drivers/memory/jz4780-nemc.c 
>> b/drivers/memory/jz4780-nemc.c
>>  index bcf06adefc96..ef3f20e46590 100644
>>  --- a/drivers/memory/jz4780-nemc.c
>>  +++ b/drivers/memory/jz4780-nemc.c
>>  @@ -161,7 +161,7 @@ static bool jz4780_nemc_configure_bank(struct 
>> jz4780_nemc *nemc,
>>   	 * Conversion of tBP and tAW cycle counts to values supported by 
>> the
>>   	 * hardware (round up to the next supported value).
>>   	 */
>>  -	static const uint32_t convert_tBP_tAW[] = {
>>  +	static const u8 convert_tBP_tAW[] = {
>>   		0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
>> 
>>   		/* 11 - 12 -> 12 cycles */
>>  @@ -232,7 +232,7 @@ static bool jz4780_nemc_configure_bank(struct 
>> jz4780_nemc *nemc,
>>   			return false;
>>   		}
>> 
>>  -		smcr |= convert_tBP_tAW[cycles] << NEMC_SMCR_TBP_SHIFT;
>>  +		smcr |= (u32)convert_tBP_tAW[cycles] << NEMC_SMCR_TBP_SHIFT;
> 
> You don't need the cast here.

OK, I will remove them in V2.

> 
> 	David
> 
> -
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