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authorPaul Mundt <lethal@linux-sh.org>2008-02-13 17:02:33 +0900
committerGreg Kroah-Hartman <gregkh@suse.de>2008-04-24 21:16:35 -0700
commit96f9bc373c83a67922dc32f358e8a3b3dd4e18a0 (patch)
treeaa307e812edce8697c5419d34e1937c7e54b60a0
parent135db0485cdfa808d69420889ca4a2fad8aed9df (diff)
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>
-rw-r--r--drivers/usb/gadget/m66592-udc.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/gadget/m66592-udc.h b/drivers/usb/gadget/m66592-udc.h
index 17b792b7f6b..be0a4c1f80a 100644
--- a/drivers/usb/gadget/m66592-udc.h
+++ b/drivers/usb/gadget/m66592-udc.h
@@ -486,10 +486,10 @@ struct m66592 {
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;