Re: [PATCH]use kzalloc in vfs where appropriate

[Arjan van de Ven <arjan@infradead.org>]

On Sat, 2006-03-18 at 11:44 +0100, Oliver Neukum wrote:
> Am Freitag, 17. März 2006 22:08 schrieb Matthew Wilcox:
> > On Fri, Mar 17, 2006 at 09:58:14PM +0100, Oliver Neukum wrote:
> > > --- a/fs/bio.c	2006-03-11 23:12:55.000000000 +0100
> > > +++ b/fs/bio.c	2006-03-17 16:44:49.000000000 +0100
> > > @@ -635,12 +635,10 @@
> > >  		return ERR_PTR(-ENOMEM);
> > >  
> > >  	ret = -ENOMEM;
> > > -	pages = kmalloc(nr_pages * sizeof(struct page *), GFP_KERNEL);
> > > +	pages = kzalloc(nr_pages * sizeof(struct page *), GFP_KERNEL);
> > 
> > Didn't we just discuss this one and conclude it needed to use kcalloc
> > instead?
> 
> I've found some discussion in the archive, but no conclusion. Could you
> elaborate?

kcalloc is the array allocator.
Here.. you're allocating an array of nr_pages worth of pointers.
kcalloc does extra checks because it KNOWS it's an array...


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