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Subject[PATCH 21/46] usb gadget: link fixes for cdc composite gadget
Date
From: David Brownell <dbrownell@users.sourceforge.net>

Change how the CDC Composite gadget driver builds: don't
use separate compilation, since it works poorly when key
parts are library code (with init sections etc). Instead
be as close as we can to "gcc --combine ...".

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/gadget/Makefile | 3 +--
drivers/usb/gadget/cdc2.c | 25 +++++++++++++++++++++++--
drivers/usb/gadget/u_ether.c | 4 ++--
3 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 736d58f..bfa0229 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -31,8 +31,7 @@ g_midi-objs := gmidi.o
gadgetfs-objs := inode.o
g_file_storage-objs := file_storage.o
g_printer-objs := printer.o
-g_cdc-objs := cdc2.o u_ether.o f_ecm.o \
- u_serial.o f_acm.o $(C_UTILS)
+g_cdc-objs := cdc2.o

ifeq ($(CONFIG_USB_ETH_RNDIS),y)
g_ether-objs += f_rndis.o rndis.o
diff --git a/drivers/usb/gadget/cdc2.c b/drivers/usb/gadget/cdc2.c
index a39a4b9..a724fc1 100644
--- a/drivers/usb/gadget/cdc2.c
+++ b/drivers/usb/gadget/cdc2.c
@@ -43,6 +43,25 @@

/*-------------------------------------------------------------------------*/

+/*
+ * Kbuild is not very cooperative with respect to linking separately
+ * compiled library objects into one module. So for now we won't use
+ * separate compilation ... ensuring init/exit sections work to shrink
+ * the runtime footprint, and giving us at least some parts of what
+ * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
+ */
+
+#include "composite.c"
+#include "usbstring.c"
+#include "config.c"
+#include "epautoconf.c"
+#include "u_serial.c"
+#include "f_acm.c"
+#include "f_ecm.c"
+#include "u_ether.c"
+
+/*-------------------------------------------------------------------------*/
+
static struct usb_device_descriptor device_desc = {
.bLength = sizeof device_desc,
.bDescriptorType = USB_DT_DEVICE,
@@ -148,7 +167,8 @@ static int __init cdc_bind(struct usb_composite_dev *cdev)
int status;

if (!can_support_ecm(cdev->gadget)) {
- ERROR(cdev, "controller '%s' not usable\n", gadget->name);
+ dev_err(&gadget->dev, "controller '%s' not usable\n",
+ gadget->name);
return -EINVAL;
}

@@ -203,7 +223,8 @@ static int __init cdc_bind(struct usb_composite_dev *cdev)
if (status < 0)
goto fail1;

- INFO(cdev, "%s, version: " DRIVER_VERSION "\n", DRIVER_DESC);
+ dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
+ DRIVER_DESC);

return 0;

diff --git a/drivers/usb/gadget/u_ether.c b/drivers/usb/gadget/u_ether.c
index 3791e62..dbd575a 100644
--- a/drivers/usb/gadget/u_ether.c
+++ b/drivers/usb/gadget/u_ether.c
@@ -52,7 +52,7 @@
* this single "physical" link to be used by multiple virtual links.)
*/

-#define DRIVER_VERSION "29-May-2008"
+#define UETH__VERSION "29-May-2008"

struct eth_dev {
/* lock is held while accessing port_usb
@@ -170,7 +170,7 @@ static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
struct eth_dev *dev = netdev_priv(net);

strlcpy(p->driver, "g_ether", sizeof p->driver);
- strlcpy(p->version, DRIVER_VERSION, sizeof p->version);
+ strlcpy(p->version, UETH__VERSION, sizeof p->version);
strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version);
strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof p->bus_info);
}
--
1.6.0.2


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