lkml.org 
[lkml]   [2006]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH]use kzalloc in vfs where appropriate
On Monday 20 March 2006 09:25, Pekka Enberg wrote:
> > > Rewriting the test as:
> > > n!=0 && n > INT_MAX / size
> > > saves the division because size is much likelier to be a constant, and indeed
> > > the code is better:
> > >
> > > cmpq $268435455, %rax
> > > movq $0, 40(%rsp)
> > > ja .L313
> > >
> > > Is there anything I am missing?

On Mon, 20 Mar 2006, Denis Vlasenko wrote:
> You may drop "n!=0" part, but you must check size!=0.
> Since if size is 0, kcalloc returns NULL, then
>
> if (!size || n > INT_MAX / size)
> return NULL;

Uh, oh, I must be getting blind to have missed that...

Pekka
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-03-20 14:19    [from the cache]
©2003-2011 Jasper Spaans