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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2023-07-03 03:27:04 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-07-03 09:17:52 +0100 |
| commit | 7387943fa35516f6f8017a3b0e9ce48a3bef9faa (patch) | |
| tree | 20734c41e3773bf0580dbd4fb3adf966a809c76c /drivers/net/wireguard/queueing.c | |
| parent | a27ac5390922059867f645eefd978e533d7af902 (diff) | |
| download | linux-7387943fa35516f6f8017a3b0e9ce48a3bef9faa.tar.gz linux-7387943fa35516f6f8017a3b0e9ce48a3bef9faa.tar.bz2 linux-7387943fa35516f6f8017a3b0e9ce48a3bef9faa.zip | |
wireguard: queueing: use saner cpu selection wrapping
Using `% nr_cpumask_bits` is slow and complicated, and not totally
robust toward dynamic changes to CPU topologies. Rather than storing the
next CPU in the round-robin, just store the last one, and also return
that value. This simplifies the loop drastically into a much more common
pattern.
Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Cc: stable@vger.kernel.org
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Manuel Leiner <manuel.leiner@gmx.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/wireguard/queueing.c')
| -rw-r--r-- | drivers/net/wireguard/queueing.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wireguard/queueing.c b/drivers/net/wireguard/queueing.c index 8084e7408c0a..26d235d15235 100644 --- a/drivers/net/wireguard/queueing.c +++ b/drivers/net/wireguard/queueing.c @@ -28,6 +28,7 @@ int wg_packet_queue_init(struct crypt_queue *queue, work_func_t function, int ret; memset(queue, 0, sizeof(*queue)); + queue->last_cpu = -1; ret = ptr_ring_init(&queue->ring, len, GFP_KERNEL); if (ret) return ret; |