lkml.org 
[lkml]   [2014]   [Jul]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/1] script/kconfig: remove a warning for menucofig
On 01.07.2014 01:10, Li, Zhen-Hua wrote:
> When malloc for jump,
> if (head && location) {
> jump = xmalloc(sizeof(struct jump_key));
> ....
> }
> And here it is used:
> if (head && location && menu == location)
> jump->offset = strlen(r->s);
>
>
> So I think when jump is used, it must not be NULL; then !=NULL is not needed.

I tested the patch against v13.6-rc5. It fixes the problem with the warning.

You can add

Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

Best regards

Heinrich


> -----Original Message-----
> From: Heinrich Schuchardt [mailto:xypron.glpk@gmx.de]
> Sent: Tuesday, July 01, 2014 1:03 AM
> To: Li, Zhen-Hua; Yann E. MORIN; linux-kbuild@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH 1/1] script/kconfig: remove a warning for menucofig
>
> On 30.06.2014 05:16, Li, Zhen-Hua wrote:
>> There is a warning when run "make menuconfig".
>>
>> scripts/kconfig/menu.c: In function ‘get_symbol_str’:
>> scripts/kconfig/menu.c:591:18: warning: ‘jump’ may be used uninitialized in
>> this function [-Wmaybe-uninitialized]
>> jump->offset = strlen(r->s);
>> ^
>> scripts/kconfig/menu.c:551:19: note: ‘jump’ was declared here
>> struct jump_key *jump;
>> ^
>>
>> It is because the compiler think "jump" is not initialized, though in fact
>> it is already initialized.
>>
>> Signed-off-by: Li, Zhen-Hua <zhen-hual@hp.com>
>> ---
>> scripts/kconfig/menu.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
>> index a26cc5d..584e0fc 100644
>> --- a/scripts/kconfig/menu.c
>> +++ b/scripts/kconfig/menu.c
>> @@ -548,7 +548,7 @@ static void get_prompt_str(struct gstr *r, struct property *prop,
>> {
>> int i, j;
>> struct menu *submenu[8], *menu, *location = NULL;
>> - struct jump_key *jump;
>> + struct jump_key *jump = NULL;
>>
>> str_printf(r, _("Prompt: %s\n"), _(prop->text));
>> menu = prop->menu->parent;
>>
> Hello Zhen-Hua,
>
> the patch looks incomplete to me. A check
> jump != NULL
> should be added before accessing parts of structure jump_key.
>
> Best regards
>
> Heinrich Schuchardt
>

--
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: 2014-07-14 19:01    [W:0.071 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site