| From oliver@neukum.org Fri Apr 20 11:51:02 2007 |
| From: Oliver Neukum <oliver@neukum.org> |
| Date: Fri, 20 Apr 2007 20:50:48 +0200 |
| Subject: usbfs micro optimitation |
| To: gregkh@suse.de, linux-usb-devel@lists.sourceforge.net |
| Message-ID: <200704202050.49246.oliver@neukum.org> |
| Content-Disposition: inline |
| |
| |
| the memory barrier is needed only with smp. |
| |
| Signed-off-by: Oliver Neukum <oneukum@suse.de> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| |
| --- |
| drivers/usb/core/devio.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/drivers/usb/core/devio.c |
| +++ b/drivers/usb/core/devio.c |
| @@ -580,7 +580,7 @@ static int usbdev_open(struct inode *ino |
| ps->disccontext = NULL; |
| ps->ifclaimed = 0; |
| security_task_getsecid(current, &ps->secid); |
| - wmb(); |
| + smp_wmb(); |
| list_add_tail(&ps->list, &dev->filelist); |
| file->private_data = ps; |
| out: |
