linux-kernel - Re: [Patch 14/16] Remove needless kmalloc casts in the zd1211rw drivers.

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Message-ID: <46AFDDD8.8050903@s5r6.in-berlin.de>
Date:	Wed, 01 Aug 2007 03:11:52 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Daniel Drake <dsd@...too.org>
CC:	jack@...keye.stone.uk.eu.org, linux-kernel@...r.kernel.org,
	trivial@...nel.org
Subject: Re: [Patch 14/16] Remove needless kmalloc casts in the zd1211rw drivers.

Daniel Drake wrote:
> jack@...keye.stone.uk.eu.org wrote:
>> Signed-off-by: Jack Stone <jack@...keye.stone.uk.eu.org>
>>
>> CC: Daniel Drake <dsd@...too.org>
> 
> NAK: this patch adds a sparse warning
> zd_chip.c:116:15: warning: implicit cast to nocast type

What does this warning mean?  a16 is defined as zd_addr_t *.

>> --- a/drivers/net/wireless/zd1211rw/zd_chip.c
>> +++ b/drivers/net/wireless/zd1211rw/zd_chip.c
>> @@ -115,7 +115,7 @@ int zd_ioread32v_locked(struct zd_chip *
>>  
>>      /* Allocate a single memory block for values and addresses. */
>>      count16 = 2*count;
>> -    a16 = (zd_addr_t *) kmalloc(count16 * (sizeof(zd_addr_t) +
>> sizeof(u16)),
>> +    a16 = kmalloc(count16 * (sizeof(zd_addr_t) + sizeof(u16)),
>>                             GFP_KERNEL);
>>      if (!a16) {
>>          dev_dbg_f(zd_chip_dev(chip),
>>

Also, why is there this cast right before that?

	zd_addr_t *a16 = (zd_addr_t *)NULL;

-- 
Stefan Richter
-=====-=-=== =--- ----=
http://arcgraph.de/sr/
-
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