Messages in this thread Patch in this message | | | From | Davidlohr Bueso <> | Subject | [PATCH] usbnet: optimize barrier usage for Rmw atomic bitops | Date | Wed, 29 Jan 2020 10:16:46 -0800 |
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Use smp_mb__before_atomic() instead of smp_mb() and avoid the unnecessary barrier for non LL/SC architectures, such as x86.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de> --- drivers/net/usb/usbnet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index 5ec97def3513..24c767350e5e 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1912,7 +1912,7 @@ int usbnet_resume (struct usb_interface *intf) } } - smp_mb(); + smp_mb__before_atomic(); clear_bit(EVENT_DEV_ASLEEP, &dev->flags); spin_unlock_irq(&dev->txq.lock); -- 2.16.4
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