On Tue, Jan 13, 2015 at 04:31:14PM +0800, sun wang wrote: > Extern variable must be declared in head file. Compiler can catch the inconsistency when variable changes. > > Signed-off-by: Sun Wang <sun.wxg@xxxxxxxxx> > --- > drivers/staging/vt6655/ioctl.c | 1 - > drivers/staging/vt6655/ioctl.h | 5 +++++ > 2 files changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/staging/vt6655/ioctl.c b/drivers/staging/vt6655/ioctl.c > index 970e80d..716fc89 100644 > --- a/drivers/staging/vt6655/ioctl.c > +++ b/drivers/staging/vt6655/ioctl.c > @@ -31,7 +31,6 @@ > */ > > #include "ioctl.h" > -#include "iocmd.h" > #include "mac.h" > #include "card.h" > #include "hostap.h" > diff --git a/drivers/staging/vt6655/ioctl.h b/drivers/staging/vt6655/ioctl.h > index 2dc5a57..42f6910 100644 > --- a/drivers/staging/vt6655/ioctl.h > +++ b/drivers/staging/vt6655/ioctl.h > @@ -30,6 +30,11 @@ > #define __IOCTL_H__ > > #include "device.h" > +#include "iocmd.h" > + > +#ifdef WPA_SM_Transtatus > +extern SWPAResult wpa_Result; > +#endif I don't understand, what problem is this solving? This variable isn't in the driver at all. confused, greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel