Re: [PATCH 09/30] mtd: Don't cast kmalloc() return value in drivers/mtd/maps/pmcmsp-flash.c

["Jesper Juhl" <jesper.juhl@gmail.com>]

On 24/08/07, Robert P. J. Day <rpjday@mindspring.com> wrote:
> On Fri, 24 Aug 2007, Denys Vlasenko wrote:
>
> > On Friday 24 August 2007 00:52, Jesper Juhl wrote:
> > > kmalloc() returns a void pointer.
> > > No need to cast it.
> >
> > > -   msp_flash = (struct mtd_info **)kmalloc(
> > > -                   fcnt * sizeof(struct map_info *), GFP_KERNEL);
> > > -   msp_parts = (struct mtd_partition **)kmalloc(
> > > -                   fcnt * sizeof(struct mtd_partition *), GFP_KERNEL);
> > > -   msp_maps = (struct map_info *)kmalloc(
> > > -                   fcnt * sizeof(struct mtd_info), GFP_KERNEL);
> > > +   msp_flash = kmalloc(fcnt * sizeof(struct map_info *), GFP_KERNEL);
> > > +   msp_parts = kmalloc(fcnt * sizeof(struct mtd_partition *), GFP_KERNEL);
> > > +   msp_maps = kmalloc(fcnt * sizeof(struct mtd_info), GFP_KERNEL);
> > >     memset(msp_maps, 0, fcnt * sizeof(struct mtd_info));
> >
> > This one wants kzalloc.
> >
> > > -           msp_parts[i] = (struct mtd_partition *)kmalloc(
> > > -                   pcnt * sizeof(struct mtd_partition), GFP_KERNEL);
> > > +           msp_parts[i] = kmalloc(pcnt * sizeof(struct mtd_partition),
> > > +                   GFP_KERNEL);
> > >             memset(msp_parts[i], 0, pcnt * sizeof(struct mtd_partition));
> > >
> > >             /* now initialize the devices proper */
> >
> > Same
>
> actually, i would think kcalloc would be more appropriate here, no?
>

Why?

msp_parts[i] = kzalloc(pcnt * sizeof(struct mtd_partition), GFP_KERNEL);

seems better to me than

msp_parts[i] = kcalloc(1, pcnt * sizeof(struct mtd_partition), GFP_KERNEL);


-- 
Jesper Juhl <jesper.juhl@gmail.com>
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