Re: [PATCH 15/16] trivial: use ARRAY_SIZE

[Kulikov Vasiliy <segooon@gmail.com>]

On Mon, Jun 28, 2010 at 14:52 +0200, Dan Carpenter wrote:
> On Mon, Jun 28, 2010 at 03:55:41PM +0400, Kulikov Vasiliy wrote:
> > Change sizeof(x) / sizeof(*x) to ARRAY_SIZE(x).
> > 
> > Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
> > ---
> >  drivers/staging/wlags49_h2/hcf.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> > 
> > diff --git a/drivers/staging/wlags49_h2/hcf.c b/drivers/staging/wlags49_h2/hcf.c
> > index 390628c..c4fe0ec 100644
> > --- a/drivers/staging/wlags49_h2/hcf.c
> > +++ b/drivers/staging/wlags49_h2/hcf.c
> > @@ -502,7 +502,7 @@ HCF_STATIC hcf_16* BASED xxxx[ ] = {
> >  #endif // MSF_COMPONENT_ID
> >  	NULL									//endsentinel
> >    };
> > -#define xxxx_PRI_IDENTITY_OFFSET	(sizeof(xxxx)/sizeof(xxxx[0]) - 3)
> > +#define xxxx_PRI_IDENTITY_OFFSET	(ARRAY_SIZE(xxxx) - 3)
> >  
> 
> I would say the more critical problem with this macro is that it doesn't
> work unless you name all your arrays "xxxx[]" so it encourages sub par
> variable names.
> 
> You could do:
> #define PRI_IDENTITY_OFFSET(x) (ARRAY_SIZE(x) - 3)

Look at the patch:

> > @@ -502,7 +502,7 @@ HCF_STATIC hcf_16* BASED xxxx[ ] = {
There is an array called 'xxxx' and macro xxxx_PRI_IDENTITY_OFFSET is defined
after array definition. This magic macroconstant is used in the code to get
elements of xxxx.