Re: [PATCH] staging: wfx: make a const array static, makes object smaller

[Christophe JAILLET]

Le 17/10/2020 à 02:11, Joe Perches a écrit :
> On Fri, 2020-10-16 at 23:33 +0100, Colin King wrote:
> > From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> >
> > Don't populate const array filter_ies on the stack but instead
> > make it static. Makes the object code smaller by 261 bytes.
> >
> > Before:
> >     text	   data	    bss	    dec	    hex	filename
> >    21674	   3166	    448	  25288	   62c8	drivers/staging/wfx/sta.o
> >
> > After:
> >     text	   data	    bss	    dec	    hex	filename
> >    21349	   3230	    448	  25027	   61c3	drivers/staging/wfx/sta.o
>
> Thanks.
>
> It's odd to me it's so large a change as it's only
> 24 bytes of initialization. (3 entries, each 8 bytes)

The function looks small.
Maybe it is inlined by gcc in each of the 3 callers?

CJ

> This line in the same function:
>
> 		hif_set_beacon_filter_table(wvif, 3, filter_ies);
>
> might as well use ARRAY_SIZE(filter_ies) instead of 3