Messages in this thread | | | Date | Mon, 25 Jul 2011 19:52:26 -0400 | Subject | Re: [PATCH] TRACING: Fix a copmile warning | From | Arnaud Lacombe <> |
| |
Hi,
On Mon, Jul 25, 2011 at 7:49 PM, Steven Rostedt <rostedt@goodmis.org> wrote: > On Mon, 2011-07-25 at 18:38 -0400, Arnaud Lacombe wrote: >> Hi, >> >> On Mon, Jul 25, 2011 at 4:19 PM, Steven Rostedt <rostedt@goodmis.org> wrote: >> > On Mon, 2011-07-25 at 15:43 -0400, Arnaud Lacombe wrote: >> > >> >> Actually, we have a special uninitialized_var(x) macro to handle such >> >> false positive. From include/linux/compiler-gcc.h: >> >> >> >> /* >> >> * A trick to suppress uninitialized variable warning without generating any >> >> * code >> >> */ >> >> #define uninitialized_var(x) x = x >> > >> > I'm aware of that too, but I think that is inappropriate as well. As I >> > said, some versions of gcc report it, others don't. Seems that gcc 4.6.0 >> > says this is an error where 4.5.1 does not (I just tried both). >> > >> did you ? gcc 4.5.1 from Fedora 14 definitively shows the warning: > > Heh, I didn't use Fedora's version. I wonder if they added a patch or > built it differently. I built my own 4.5.1 as well as my own 4.6.0. > I'd assume you're building with -O2, the warning only shows up at -Os, see my previous mail.
- Arnaud -- 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/
| |