Re: [PATCH 13/21] Staging: bcm: Remove typedef for _U_IP_ADDRESS and convert union to struct.

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On Tue, May 22, 2012 at 08:08:46AM -0400, Kevin McKinney wrote:
> On Tue, May 22, 2012 at 5:17 AM, Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:
> > On Tue, May 22, 2012 at 12:06:26AM -0400, Kevin McKinney wrote:
> >> This patch removes typedef for _U_IP_ADDRESS,
> >> changes the name of the union from _U_IP_ADDRESS
> >> to bcm_ip_address, and converts the union to a
> >> struct. In addition, any calls to the following
> >> typedef "U_IP_ADDRESS" are changed to call the
> >> struct directly.
> >>
> >> Signed-off-by: Kevin McKinney <klmckinney1@xxxxxxxxx>
> >
> > No, this doesn't work at all.  You can't be changing unions to
> > structs without more explanation than that.  It breaks everything.
> >
> My reason for changing this to a struct was to remove the need for the
> typedef.  Obviously I was wrong, but when I remove the keyword
> "typedef", I received a compile error.  So I thought the way I would
> fix this would be to change it to a struct.  I do understand the
> difference between a struct and a union, but I did not anticipate this
> change would completely break the build.  Is this because of how the
> fields are being referenced? Sorry about this, I will redo the entire
> patch set and change this back to a union, and figure out another way
> to remove the "typedef".
> 

It doesn't break the build, it stops the driver from working.

Look up the difference on google etc.

regards,
dan carpenter
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