This Linux kernel change "tun: remove unnecessary memory barrier" is included in the Linux 5.0 release. This change is authored by Timur Celik <mail [at] timurcelik.de> on Mon Feb 25 21:13:13 2019 +0100. The commit for this change in Linux stable tree is ecef67c (patch).
tun: remove unnecessary memory barrier Replace set_current_state with __set_current_state since no memory barrier is needed at this point. Signed-off-by: Timur Celik <[email protected]> Reviewed-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
There are 2 lines of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.
drivers/net/tun.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index d291762..53f4f37 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -2185,7 +2185,7 @@ static void *tun_ring_recv(struct tun_file *tfile, int noblock, int *err) schedule(); } - set_current_state(TASK_RUNNING); + __set_current_state(TASK_RUNNING); remove_wait_queue(&tfile->wq.wait, &wait); out: