Yunsheng Lin 89837eb4b2 net: sched: add barrier to ensure correct ordering for lockless qdisc ... The spin_trylock() was assumed to contain the implicit barrier needed to ensure the correct ordering between STATE_MISSED setting/clearing and STATE_MISSED checking in commit a90c57f2ce ("net: sched: fix packet stuck problem for lockless qdisc"). But it turns out that spin_trylock() only has load-acquire semantic, for strongly-ordered system(like x86), the compiler barrier implicitly contained in spin_trylock() seems enough to ensure the correct ordering. But for weakly-orderly system (like arm64), the store-release semantic is needed to ensure the correct ordering as clear_bit() and test_bit() is store operation, see queued_spin_lock(). So add the explicit barrier to ensure the correct ordering for the above case. Fixes: a90c57f2ce ("net: sched: fix packet stuck problem for lockless qdisc") Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> Acked-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2021-06-21 11:51:41 -07:00
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acpi	…
asm-generic	vmlinux.lds.h: Avoid orphan section with !SMP	2021-06-02 12:43:55 -07:00
clocksource	…
crypto	…
drm	…
dt-bindings	dt-bindings: connector: Add PD rev 2.0 VDO definition	2021-06-04 11:43:01 +02:00
keys	integrity-v5.13	2021-05-01 15:32:18 -07:00
kunit	…
kvm	…
linux	Networking fixes for 5.13-rc7, including fixes from wireless, bpf,	2021-06-18 18:55:29 -07:00
math-emu	…
media	…
memory	…
misc	…
net	net: sched: add barrier to ensure correct ordering for lockless qdisc	2021-06-21 11:51:41 -07:00
pcmcia	…
ras	…
rdma	…
scsi	…
soc	…
sound	ASoC: Fixes for v5.13	2021-05-25 08:58:01 +02:00
target	…
trace	NFS client updates for Linux 5.13	2021-05-07 11:23:41 -07:00
uapi	Networking fixes for 5.13-rc7, including fixes from wireless, bpf,	2021-06-18 18:55:29 -07:00
vdso	…
video	…
xen	xen/arm: move xen_swiotlb_detect to arm/swiotlb-xen.h	2021-05-14 15:52:05 +02:00