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net/smc: Add comment for smc_tx_pending 

The previous patch introduces a lock-free version of smc_tx_work() to
solve unnecessary lock contention, which is expected to be held lock.
So this adds comment to remind people to keep an eye out for locks.

Suggested-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tony Lu 2022-02-11 14:52:21 +08:00 committed by David S. Miller
parent 806c37ddcf
commit 2e13bde131
1 changed files with 6 additions and 1 deletions
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7
net/smc/smc_tx.c
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@ -611,6 +611,10 @@ int smc_tx_sndbuf_nonempty(struct smc_connection *conn)
return rc;
}
/* Wakeup sndbuf consumers from process context
* since there is more data to transmit. The caller
* must hold sock lock.
*/
void smc_tx_pending(struct smc_connection *conn)
{
struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
@ -626,7 +630,8 @@ void smc_tx_pending(struct smc_connection *conn)
}
/* Wakeup sndbuf consumers from process context
* since there is more data to transmit
* since there is more data to transmit in locked
* sock.
*/
void smc_tx_work(struct work_struct *work)
{