Hi Darren,
On Wed, 14 Dec 2016 14:59:14 -0800 Darren Hart <dvhart@xxxxxxxxxxxxx> wrote:
>
> On Wed, Dec 14, 2016 at 02:21:38PM -0800, Darren Hart wrote:
> > On Wed, Dec 14, 2016 at 01:50:44PM +1100, Stephen Rothwell wrote:
> > >
> > > After merging the drivers-x86 tree, today's linux-next build (x86_64
> > > allmodconfig) produced this warning:
> > >
> > > In file included from include/linux/kernel.h:13:0,
> > > from drivers/platform/x86/thinkpad_acpi.c:52:
> > > drivers/platform/x86/thinkpad_acpi.c: In function 'hotkey_init':
> > > include/linux/printk.h:299:2: warning: 'type' may be used uninitialized in this function [-Wmaybe-uninitialized]
> > > printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
> > > ^
> > > drivers/platform/x86/thinkpad_acpi.c:3147:8: note: 'type' was declared here
> > > char *type;
> > > ^
> > > In file included from include/linux/kernel.h:13:0,
> > > from drivers/platform/x86/thinkpad_acpi.c:52:
> > > include/linux/printk.h:299:2: warning: 'in_tablet_mode' may be used uninitialized in this function [-Wmaybe-uninitialized]
> > > printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
> > > ^
> > > drivers/platform/x86/thinkpad_acpi.c:3146:6: note: 'in_tablet_mode' was declared here
> > > int in_tablet_mode, res;
> > > ^
> > >
> > > Introduced by commit
> > >
> > > b31800283868 ("platform/x86: thinkpad_acpi: Move tablet detection into separate function")
> > >
> > > I can't tell if this is a false positive or not.
> >
> > That's an uninitialized local variable. Not sure how I missed that. I'll
> > fix it up today. Thank you for the report.
>
> OK, no, it's a false positive because tp_features.hotkey_tablet is assigned in
> both places where in_tablet_mode is assigned, and if the former is 0 (global
> scope), the function returns without calling pr_info.
How about "type".
> Lyude, Henrique, please confirm.
>
> Regardless, I'll add a patch to init in_tablet_mode to 0 so it is explicit - but
> will not rebase as it isn't technically an error.
No problem, it is only a warning after all.
--
Cheers,
Stephen Rothwell
--
To unsubscribe from this list: send the line "unsubscribe linux-next" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
