netdev - Re: [ath9k-devel] [PATCH net-next 1/2] wireless: Remove casts of void *

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Date:	Tue, 14 Jun 2011 09:43:51 -0700
From:	Joe Perches <joe@...ches.com>
To:	Pavel Roskin <proski@....org>
Cc:	netdev@...r.kernel.org, Intel Linux Wireless <ilw@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
	"John W. Linville" <linville@...driver.com>,
	Jouni Malinen <jmalinen@...eros.com>,
	Senthil Balasubramanian <senthilkumar@...eros.com>,
	ath9k-devel@...ts.ath9k.org, Wey-Yi Guy <wey-yi.w.guy@...el.com>,
	Vasanthakumar Thiagarajan <vasanth@...eros.com>,
	Christian Lamparter <chunkeey@...glemail.com>,
	Stanislaw Gruszka <sgruszka@...hat.com>
Subject: Re: [ath9k-devel] [PATCH net-next 1/2] wireless: Remove casts of
 void *

On Tue, 2011-06-14 at 12:31 -0400, Pavel Roskin wrote:
> On 06/14/2011 12:02 AM, Joe Perches wrote:
> >   		/* Get the message ID */
> > -		msg_id = (__be16 *) ((void *) htc_hdr +
> > -				     sizeof(struct htc_frame_hdr));
> > +		msg_id = (void *)htc_hdr + sizeof(struct htc_frame_hdr);
> I would never do stuff like this without verifying by sparse that no 
> warnings are introduced.

I did that.  I believe there are no new warnings.

> Sparse warnings should be avoided to keep sparse checks useful. 
> Otherwise, important warnings would drown in the noise.

$ make allyesconfig
$ git log -1 --pretty=oneline drivers/net/wireless/ath/ath9k/htc_hst.c
337c22b774ff7f007b90b266b25c9a33ff555c48 wireless: Remove casts of void *
$ make C=2 drivers/net/wireless/ath/ath9k/htc_hst.o
make[1]: Nothing to be done for `all'.
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    scripts/checksyscalls.sh
  CHECK   scripts/mod/empty.c
  CHECK   drivers/net/wireless/ath/ath9k/htc_hst.c
  CC      drivers/net/wireless/ath/ath9k/htc_hst.o
$

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