Re: [PATCH] mmc: Test bus-width for old MMC devices (v2)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



At Fri, 17 Dec 2010 03:43:42 +0000,
Chris Ball wrote:
> 
> Hi Philip,
> 
> On Thu, Dec 16, 2010 at 06:33:49PM -0800, Philip Rakity wrote:
> > It is not possible for bus_width to be not initialized.  This would imply ARRAY_SIZE(bus_widths) is 1.  Certainly not true.
> 
> Right, I agree.  We should fix the warning anyway.

Well, this is always a gray-zone question.  One prefers fixing it
either via uninitialized_var() or by setting a bogus value.  But, this
would cover any possible real bug in future.  Thus another prefers
ignoring it, because it's just a compiler bug (mostly of old gcc).

After all, it's up to maintainer, so take as you like :)


thanks,

Takashi


> > We could just initialize by changing
> > +		unsigned idx, bus_width;
> > to
> > +		unsigned idx, bus_width = 0;
> 
> Okay, I've pushed to mmc-next with that change.
> 
> > I wonder what compiler are you using so we can avoid this issue in future.
> 
> Ah, good point -- I was building with a gcc 4.1.2 ARM cross-compiler,
> and using a gcc 4.5.1 cross-build instead avoids the warning.
> 
> Thanks,
> 
> -- 
> Chris Ball   <cjb@xxxxxxxxxx>   <http://printf.net/>
> One Laptop Per Child
> 
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux