linux-kernel - Re: [Outreachy kernel] Re: [PATCH] staging: unisys: visorbus: Declared char * array as static const

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Date:   Sat, 9 Sep 2017 10:36:08 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Greg KH <gregkh@...uxfoundation.org>
cc:     Harsha Sharma <harshasharmaiitr@...il.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        outreachy-kernel@...glegroups.com
Subject: Re: [Outreachy kernel] Re: [PATCH] staging: unisys: visorbus: Declared
 char * array as static const



On Sat, 9 Sep 2017, Greg KH wrote:

> On Sat, Sep 09, 2017 at 12:30:42PM +0530, Harsha Sharma wrote:
> > State explicitly that individual entries in array will not change.
> >
> > Signed-off-by: Harsha Sharma <harshasharmaiitr@...il.com>
> > ---
> >  drivers/staging/unisys/visorbus/visorchipset.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/staging/unisys/visorbus/visorchipset.c b/drivers/staging/unisys/visorbus/visorchipset.c
> > index 6d4498f..6f2a010 100644
> > --- a/drivers/staging/unisys/visorbus/visorchipset.c
> > +++ b/drivers/staging/unisys/visorbus/visorchipset.c
> > @@ -1162,7 +1162,7 @@ static ssize_t deviceenabled_store(struct device *dev,
> >  	struct controlvm_message_packet *cmd = &req->msg.cmd;
> >  	char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40],
> >  	    env_func[40];
> > -	char *envp[] = {
> > +	static const char * const envp[] = {
>
> Are you _sure_ about this?  Why make it static?  That seems a bit "odd",
> don't you think?  You need a lot more changelog text to get everyone to
> agree that this is ok to do...

Harsha,

Study carefully what static means when it is attached to a local variable.
And be sure that your code actually compiles.  If it doesn't try to figure
out why not.  There are other commits that are sort of like this on in the
kernel that you can find using git log.  But you may notice that they are
different in some way from yours.

julia


>
> Also, you forgot to cc: the actual maintainers of this code...
>
> thanks,
>
> greg k-h
>
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