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usbfs micro optimitation 

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>
This commit is contained in:
Oliver Neukum 2007-04-20 20:50:48 +02:00 committed by Greg Kroah-Hartman
parent 1b101ceb91
commit 527660a819
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/core/devio.c
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@ -580,7 +580,7 @@ static int usbdev_open(struct inode *inode, struct file *file)
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: