USB: m66592-udc: reduce size of data structure.
Poking around with pahole, we see that m66592 handily shoves a u16 in
between larger types on 2 separate occasions leaving us with 2 2-byte
holes:
struct m66592 {
...
/* size: 1196, cachelines: 38 */
/* sum members: 1192, holes: 2, sum holes: 4 */
/* last cacheline: 12 bytes */
}; /* definitions: 1 */
Pairing them gets back 4-bytes:
struct m66592 {
...
/* size: 1192, cachelines: 38 */
/* last cacheline: 8 bytes */
}; /* definitions: 1 */
Unfortunately it's not enough to save a cacheline with this massive
structure, but every byte helps.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/m66592-udc.h b/drivers/usb/gadget/m66592-udc.h
index 17b792b..be0a4c1 100644
--- a/drivers/usb/gadget/m66592-udc.h
+++ b/drivers/usb/gadget/m66592-udc.h
@@ -486,10 +486,10 @@
struct usb_request *ep0_req; /* for internal request */
u16 ep0_data; /* for internal request */
+ u16 old_vbus;
struct timer_list timer;
- u16 old_vbus;
int scount;
int old_dvsq;