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rxrpc: Don't lock call->tx_lock to access call->tx_buffer

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call->tx_buffer is now only accessed within the I/O thread (->tx_sendmsg is
the way sendmsg passes packets to the I/O thread) so there's no need to
lock around it.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
This commit is contained in:
David Howells 2022-10-17 22:48:58 +01:00
parent f21e93485b
commit b30d61f4b1
1 changed files with 2 additions and 10 deletions
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12
net/rxrpc/txbuf.c
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@ -110,12 +110,8 @@ void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *call)
_enter("%x/%x/%x", call->tx_bottom, call->acks_hard_ack, call->tx_top);
for (;;) {
spin_lock(&call->tx_lock);
txb = list_first_entry_or_null(&call->tx_buffer,
struct rxrpc_txbuf, call_link);
if (!txb)
break;
while ((txb = list_first_entry_or_null(&call->tx_buffer,
struct rxrpc_txbuf, call_link))) {
hard_ack = smp_load_acquire(&call->acks_hard_ack);
if (before(hard_ack, txb->seq))
break;
@ -128,15 +124,11 @@ void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *call)
trace_rxrpc_txqueue(call, rxrpc_txqueue_dequeue);
spin_unlock(&call->tx_lock);
rxrpc_put_txbuf(txb, rxrpc_txbuf_put_rotated);
if (after(call->acks_hard_ack, call->tx_bottom + 128))
wake = true;
}
spin_unlock(&call->tx_lock);
if (wake)
wake_up(&call->waitq);
}