Commit 7cfc1b1f authored by Eric Dumazet's avatar Eric Dumazet Committed by Paolo Abeni
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net: netdev_tx_sent_queue() small optimization 



Change smp_mb() imediately following a set_bit()
with smp_mb__after_atomic().

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20241018052310.2612084-1-edumazet@google.com


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent e44ef3f6

include/linux/netdevice.h

+1 −1
Original line number Diff line number Diff line
@@ -3517,7 +3517,7 @@ static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, 
	 * because in netdev_tx_completed_queue we update the dql_completed

	 * before checking the XOFF flag.

	 */

	smp_mb();

	smp_mb__after_atomic();



	/* check again in case another CPU has just made room avail */

	if (unlikely(dql_avail(&dev_queue->dql) >= 0))