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From: yjin <yanjiang.jin@windriver.com>
To: Kim Phillips <kim.phillips@freescale.com>
Cc: <horia.geanta@freescale.com>, <herbert@gondor.apana.org.au>,
	<davem@davemloft.net>, <ruchika.gupta@freescale.com>,
	<cristian.stoica@freescale.com>, <NiteshNarayanLal@freescale.com>,
	<linux-crypto@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<jinyanjiang@gmail.com>
Subject: Re: [PATCH 1/3] crypto: caam: fix some compile warnings
Date: Wed, 4 Mar 2015 10:32:03 +0800	[thread overview]
Message-ID: <54F66EA3.7080506@windriver.com> (raw)
In-Reply-To: <20150303125953.8585904680288a9734566b42@freescale.com>


On 2015年03月04日 02:59, Kim Phillips wrote:
> On Tue, 3 Mar 2015 14:50:51 +0800
> <yanjiang.jin@windriver.com> wrote:
>
>> This commit is to avoid the below warnings:
>>
>> drivers/crypto/caam/sg_sw_sec4.h:88:12: warning:
>> 'dma_map_sg_chained' defined but not used [-Wunused-function]
>>   static int dma_map_sg_chained(struct device *dev, struct scatterlist *sg,
>>              ^
>> drivers/crypto/caam/sg_sw_sec4.h:104:12: warning:
>> 'dma_unmap_sg_chained' defined but not used [-Wunused-function]
>>   static int dma_unmap_sg_chained(struct device *dev,
>>              ^
> I'm not seeing these warnings - both caamalg.c and caamhash.c use
> those functions fine.

As you said, both caamalg.c and caamhash.c use those functions, so no 
warning reported.

But if a new file just wants to include "sg_sw_sec4.h", doesn't want to 
use these functions, the above warnings will appear.

We can find an example in Freescale SDK 1.6:
caampkc.c includes pkc_desc.h, pkc_desc.h includes sg_sw_sec4.h, but 
caampkc.c doesn't call those functions.

Without my patch, every file which includes sg_sw_sec4.h must call these 
two functions in the future, I don't think it is a good idea.

Thanks!
Yanjiang
>
>> -static int dma_map_sg_chained(struct device *dev, struct scatterlist *sg,
>> +static inline int dma_map_sg_chained(struct device *dev, struct scatterlist *sg,
>>   			      unsigned int nents, enum dma_data_direction dir,
>>   			      bool chained)
> not to mention this isn't how to fix a defined but not used warning:
> marking the functions inline results in different compiler output.
>
> NACK from me.
>
> Kim
>
>


  reply	other threads:[~2015-03-04  2:33 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-03  6:50 [PATCH 0/3] fix some CAAM warnings yanjiang.jin
2015-03-03  6:50 ` [PATCH 1/3] crypto: caam: fix some compile warnings yanjiang.jin
2015-03-03 18:59   ` Kim Phillips
2015-03-04  2:32     ` yjin [this message]
2015-03-04  4:57       ` yjin
2015-03-04  9:03         ` Cristian Stoica
2015-03-04 18:34           ` Kim Phillips
2015-03-05  7:12             ` Cristian Stoica
2015-03-06  0:38               ` Kim Phillips
2015-03-04  8:48       ` Cristian Stoica
2015-03-04  9:11       ` Cristian Stoica
2015-03-03  6:50 ` [PATCH 2/3] crypto: caam_rng: fix rng_unmap_ctx's DMA_UNMAP size problem yanjiang.jin
2015-03-03 19:31   ` Kim Phillips
2015-03-04  5:33     ` yjin
2015-03-04 18:36       ` Kim Phillips
2015-03-05  2:52         ` yjin
2015-03-06  0:28           ` Kim Phillips
2015-03-03  6:50 ` [PATCH 3/3] crypto: caamhash: - fix uninitialized edesc->sec4_sg_bytes field yanjiang.jin
2015-03-03 13:39 ` [PATCH 0/3] fix some CAAM warnings Horia Geantă

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