Re: [PATCH 00/26] constify local structures

Julia Lawall
2016-09-11T19:11:35Z

On Sun, 11 Sep 2016, Joe Perches wrote:

> On Sun, 2016-09-11 at 15:05 +0200, Julia Lawall wrote:
> > Constify local structures.
>
> Thanks Julia.
>
> A few suggestions & questions:
>
> Perhaps the script should go into scripts/coccinelle/
> so that future cases could be caught by the robot
> and commit message referenced by the patch instances.

OK.

> Can you please compile the files modified using the
> appropriate defconfig/allyesconfig and show the

I currently send patches for this issue only for files that compile using
the x86 allyesconfig.

> movement from data to const by using
> $ size .new/old
> and include that in the changelogs (maybe next time)?

OK, thanks for the suggestion.

> Is it possible for a rule to trace the instances where
> an address of a struct or struct member is taken by
> locally defined and declared function call where the
> callee does not modify any dereferenced object?
>
> ie:
>
> struct foo {
> int bar;
> char *baz;
> };
>
> struct foo qux[] = {
> { 1, "description 1" },
> { 2, "dewcription 2" },
> [ n, "etc" ]...,
> };
>
> void message(struct foo *msg)
> {
> printk("%d %s\n", msg->bar, msg->baz);
> }
>
> where some code uses
>
> message(qux[index]);
>
> So could a coccinelle script change:
>
> struct foo qux[] = { to const struct foo quz[] = {
>
> and
>
> void message(struct foo *msg) to void message(const struct foo *msg)

Yes, this could be possible too.

Thanks for the feedback.

julia