linux-kernel - [PATCH 1/2] net: atm: pppoatm: use tasklet

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Date:   Wed, 27 Jan 2021 18:32:55 +0100
From:   Emil Renner Berthing <kernel@...il.dk>
To:     netdev@...r.kernel.org
Cc:     Emil Renner Berthing <kernel@...il.dk>,
        Mitchell Blank Jr <mitch@...oth.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] net: atm: pppoatm: use tasklet_init to initialize wakeup tasklet

Previously a temporary tasklet structure was initialized on the stack
using DECLARE_TASKLET_OLD() and then copied over and modified. Nothing
else in the kernel seems to use this pattern, so let's just call
tasklet_init() like everyone else.

Signed-off-by: Emil Renner Berthing <kernel@...il.dk>
---
 net/atm/pppoatm.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c
index 579b66da1d95..5f06af098390 100644
--- a/net/atm/pppoatm.c
+++ b/net/atm/pppoatm.c
@@ -389,11 +389,7 @@ static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
 	struct atm_backend_ppp be;
 	struct pppoatm_vcc *pvcc;
 	int err;
-	/*
-	 * Each PPPoATM instance has its own tasklet - this is just a
-	 * prototypical one used to initialize them
-	 */
-	static const DECLARE_TASKLET_OLD(tasklet_proto, pppoatm_wakeup_sender);
+
 	if (copy_from_user(&be, arg, sizeof be))
 		return -EFAULT;
 	if (be.encaps != PPPOATM_ENCAPS_AUTODETECT &&
@@ -415,8 +411,8 @@ static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
 	pvcc->chan.ops = &pppoatm_ops;
 	pvcc->chan.mtu = atmvcc->qos.txtp.max_sdu - PPP_HDRLEN -
 	    (be.encaps == e_vc ? 0 : LLC_LEN);
-	pvcc->wakeup_tasklet = tasklet_proto;
-	pvcc->wakeup_tasklet.data = (unsigned long) &pvcc->chan;
+	tasklet_init(&pvcc->wakeup_tasklet, pppoatm_wakeup_sender,
+		     (unsigned long)&pvcc->chan);
 	err = ppp_register_channel(&pvcc->chan);
 	if (err != 0) {
 		kfree(pvcc);
-- 
2.30.0