On Wed, 7 Feb 2007 11:48:25 +0000 Ben Dooks <[EMAIL PROTECTED]> wrote:
> On Tue, Feb 06, 2007 at 09:09:30PM -0800, Andrew Morton wrote:
> > On Tue, 6 Feb 2007 19:26:28 +0000 Ben Dooks <[EMAIL PROTECTED]> wrote:
> >
> > > This patch is an update patch, ready for merging
> > > for the Silicon Motion SM501 multi-function device
> > > core.
> > >
> > > This driver handles the core function of the chip,
> > > including the clock, power control and allocation
> > > of resources for drivers. It also exports a series
> > > of platform devices for the function drivers to
> > > attach to.
> > >
> > > This patch supports both platform and PCI bus
> > > attached devices.
> > >
> > > Signed-off-by: Ben Dooks <[EMAIL PROTECTED]>
> >
> > Can we get Vincent's signoff here?
> >
> > > +#ifdef CONFIG_DEBUG
> >
> > This doesn't appear to be defined anywhere, and nor should it be.
> > Something subsystem-specific should be used here?
>
> This protects the code being used by dev_dbg() only from being
> warned as not being used.
I know what is does, but I query the use of "CONFIG_DEBUG". I don't think
there's a CONFIG_DEBUG defined in existing Kconfig, and your patch doesn't
add a CONFIG_DEBUG and nor should it, because that would be an
inappropriate identifier to use.
So I'd suggest you just use DEBUG, as many other drivers do. Or call it
CONFIG_SM501_DEBUG and add the Kconfig record to enable it.
> > > +#define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x)
> >
> > eww.
>
> Do you have a better way of printing a nice formatted MHz with
> fractional parts?
Nope.
> Is it going to be necessary to remove this?
Nope. But ewww.
> > > + (void)readl(sm->regs);
> >
> > Is there any benefit in all those casts? Generally we prefer to avoid
> > them.
>
> I thoguht they where necessary to stop the compiler optimising
> away the readl() ?
No, that shuldn't be necessary. If it was, the compiler would optimise
away the first readl() in
my_local = readl(foo);
my_local = readl(bar);
which would break stuff. readl() implementations use volatile to prevent
this.
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