Messages in this thread | | | Date | Wed, 10 Jun 2015 16:09:40 +0200 | Subject | Re: [PATCH v2 09/10] samples/kdbus: fix operator precedence issue in KDBUS_ITEM_NEXT macro | From | David Herrmann <> |
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Hi
On Tue, Jun 9, 2015 at 11:00 PM, Sergei Zviagintsev <sergei@s15v.net> wrote: > `item' argument in KDBUS_ITEM_NEXT macro is not enclosed into > parentheses when the cast operator is applied, which leads to improper > type conversion if `item' is supplied as a complex expression, e.g. > > KDBUS_ITEM_NEXT(condition ? a : b) > > Use parentheses properly to guarantee right precedence. > > Signed-off-by: Sergei Zviagintsev <sergei@s15v.net> > --- > samples/kdbus/kdbus-api.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Thanks David
> diff --git a/samples/kdbus/kdbus-api.h b/samples/kdbus/kdbus-api.h > index 2de4d6a8c51e..fab873b89d97 100644 > --- a/samples/kdbus/kdbus-api.h > +++ b/samples/kdbus/kdbus-api.h > @@ -8,7 +8,7 @@ > #define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data) > #define KDBUS_ITEM_SIZE(s) KDBUS_ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE) > #define KDBUS_ITEM_NEXT(item) \ > - (typeof(item))(((uint8_t *)item) + KDBUS_ALIGN8((item)->size)) > + (typeof(item))((uint8_t *)(item) + KDBUS_ALIGN8((item)->size)) > #define KDBUS_FOREACH(iter, first, _size) \ > for (iter = (first); \ > ((uint8_t *)(iter) < (uint8_t *)(first) + (_size)) && \ > -- > 1.8.3.1 >
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