[PATCH 1/2] net: atm: pppoatm: use tasklet_init to initialize wakeup tasklet

[PATCH 1/2] net: atm: pppoatm: use tasklet_init to initialize wakeup tasklet

[Emil Renner Berthing]

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@esmil.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

[PATCH 2/2] net: atm: pppoatm: use new API for wakeup tasklet

[Emil Renner Berthing]

This converts the driver to use the new tasklet API introduced in
commit 12cc923f1ccc ("tasklet: Introduce new initialization API")

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
---
 net/atm/pppoatm.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c
index 5f06af098390..3e4f17d335fe 100644
--- a/net/atm/pppoatm.c
+++ b/net/atm/pppoatm.c
@@ -101,9 +101,11 @@ static inline struct pppoatm_vcc *chan_to_pvcc(const struct ppp_channel *chan)
  * doesn't want to be called in interrupt context, so we do it from
  * a tasklet
  */
-static void pppoatm_wakeup_sender(unsigned long arg)
+static void pppoatm_wakeup_sender(struct tasklet_struct *t)
 {
-	ppp_output_wakeup((struct ppp_channel *) arg);
+	struct pppoatm_vcc *pvcc = from_tasklet(pvcc, t, wakeup_tasklet);
+
+	ppp_output_wakeup(&pvcc->chan);
 }
 
 static void pppoatm_release_cb(struct atm_vcc *atmvcc)
@@ -411,8 +413,7 @@ 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);
-	tasklet_init(&pvcc->wakeup_tasklet, pppoatm_wakeup_sender,
-		     (unsigned long)&pvcc->chan);
+	tasklet_setup(&pvcc->wakeup_tasklet, pppoatm_wakeup_sender);
 	err = ppp_register_channel(&pvcc->chan);
 	if (err != 0) {
 		kfree(pvcc);
-- 
2.30.0

Re: [PATCH 1/2] net: atm: pppoatm: use tasklet_init to initialize wakeup tasklet

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (refs/heads/master):

On Wed, 27 Jan 2021 18:32:55 +0100 you wrote:
> 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@esmil.dk>
> 
> [...]

Here is the summary with links:
  - [1/2] net: atm: pppoatm: use tasklet_init to initialize wakeup tasklet
    https://git.kernel.org/netdev/net-next/c/a5b88632fc96
  - [2/2] net: atm: pppoatm: use new API for wakeup tasklet
    https://git.kernel.org/netdev/net-next/c/a58745979cdd

You are awesome, thank you!
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