[PATCH] [IrDA] Fix IrDA build failure

[PATCH] [IrDA] Fix IrDA build failure

[Samuel Ortiz]

Hi Dave,

When having built-in IrDA, we hit the following error:

`irda_sysctl_unregister' referenced in section `.init.text' of
net/built-in.o: defined in discarded section `.exit.text' of
net/built-in.o
`irda_proc_unregister' referenced in section `.init.text' of
net/built-in.o: defined in discarded section `.exit.text' of
net/built-in.o
`irsock_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
`irttp_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
`iriap_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
`irda_device_cleanup' referenced in section `.init.text' of
net/built-in.o: defined in discarded section `.exit.text' of
net/built-in.o
`irlap_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
`irlmp_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
make[1]: *** [.tmp_vmlinux1] Error 1
make: *** [_all] Error 2

This is due to the irda_init fix recently added, where we call __exit
routines from an __init one. It is a build failure that I didn't catch
because it doesn't show up when building IrDA as a module. My apologies
for that.
The following patch fixes that failure and is against your net-2.6
tree. I hope it can make it to the merge window, and stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
is CCed on this mail.

Signed-off-by: Samuel Ortiz <samuel-jcdQHdrhKHMdnm+yROfE0A@public.gmane.org>

diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
index dcd7e32..4c670cf 100644
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -2567,7 +2567,7 @@ int __init irsock_init(void)
  *    Remove IrDA protocol
  *
  */
-void __exit irsock_cleanup(void)
+void irsock_cleanup(void)
 {
 	sock_unregister(PF_IRDA);
 	proto_unregister(&irda_proto);
diff --git a/net/irda/irda_device.c b/net/irda/irda_device.c
index 7b5def1..435b563 100644
--- a/net/irda/irda_device.c
+++ b/net/irda/irda_device.c
@@ -95,14 +95,14 @@ int __init irda_device_init( void)
 	return 0;
 }
 
-static void __exit leftover_dongle(void *arg)
+static void leftover_dongle(void *arg)
 {
 	struct dongle_reg *reg = arg;
 	IRDA_WARNING("IrDA: Dongle type %x not unregistered\n",
 		     reg->type);
 }
 
-void __exit irda_device_cleanup(void)
+void irda_device_cleanup(void)
 {
 	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 
diff --git a/net/irda/iriap.c b/net/irda/iriap.c
index 774eb70..ee3889f 100644
--- a/net/irda/iriap.c
+++ b/net/irda/iriap.c
@@ -153,7 +153,7 @@ int __init iriap_init(void)
  *    Initializes the IrIAP layer, called by the module cleanup code in
  *    irmod.c
  */
-void __exit iriap_cleanup(void)
+void iriap_cleanup(void)
 {
 	irlmp_unregister_service(service_handle);
 
diff --git a/net/irda/irlap.c b/net/irda/irlap.c
index 2fc9f51..3d76aaf 100644
--- a/net/irda/irlap.c
+++ b/net/irda/irlap.c
@@ -95,7 +95,7 @@ int __init irlap_init(void)
 	return 0;
 }
 
-void __exit irlap_cleanup(void)
+void irlap_cleanup(void)
 {
 	IRDA_ASSERT(irlap != NULL, return;);
 
diff --git a/net/irda/irlmp.c b/net/irda/irlmp.c
index 24a5e3f..7efa930 100644
--- a/net/irda/irlmp.c
+++ b/net/irda/irlmp.c
@@ -116,7 +116,7 @@ int __init irlmp_init(void)
  *    Remove IrLMP layer
  *
  */
-void __exit irlmp_cleanup(void)
+void irlmp_cleanup(void)
 {
 	/* Check for main structure */
 	IRDA_ASSERT(irlmp != NULL, return;);
diff --git a/net/irda/irproc.c b/net/irda/irproc.c
index d6f9aba..181cb51 100644
--- a/net/irda/irproc.c
+++ b/net/irda/irproc.c
@@ -84,7 +84,7 @@ void __init irda_proc_register(void)
  *    Unregister irda entry in /proc file system
  *
  */
-void __exit irda_proc_unregister(void)
+void irda_proc_unregister(void)
 {
 	int i;
 
diff --git a/net/irda/irsysctl.c b/net/irda/irsysctl.c
index 2e968e7..957e04f 100644
--- a/net/irda/irsysctl.c
+++ b/net/irda/irsysctl.c
@@ -287,7 +287,7 @@ int __init irda_sysctl_register(void)
  *    Unregister our sysctl interface
  *
  */
-void __exit irda_sysctl_unregister(void)
+void irda_sysctl_unregister(void)
 {
 	unregister_sysctl_table(irda_table_header);
 }
diff --git a/net/irda/irttp.c b/net/irda/irttp.c
index 7f50832..3d7ab03 100644
--- a/net/irda/irttp.c
+++ b/net/irda/irttp.c
@@ -109,7 +109,7 @@ int __init irttp_init(void)
  *    Called by module destruction/cleanup code
  *
  */
-void __exit irttp_cleanup(void)
+void irttp_cleanup(void)
 {
 	/* Check for main structure */
 	IRDA_ASSERT(irttp->magic == TTP_MAGIC, return;);

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Re: [PATCH] [IrDA] Fix IrDA build failure

[Evgeniy Polyakov]

Hi Samuel.

On Mon, Jul 16, 2007 at 02:17:15PM +0300, Samuel Ortiz (samuel.ortiz@solidboot.com) wrote:
> This is due to the irda_init fix recently added, where we call __exit
> routines from an __init one. It is a build failure that I didn't catch
> because it doesn't show up when building IrDA as a module. My apologies
> for that.

What about having all of them __devinit/__devexit?

-- 
	Evgeniy Polyakov

Re: [PATCH] [IrDA] Fix IrDA build failure

[Adrian Bunk]

On Mon, Jul 16, 2007 at 03:56:26PM +0400, Evgeniy Polyakov wrote:
> Hi Samuel.
> 
> On Mon, Jul 16, 2007 at 02:17:15PM +0300, Samuel Ortiz (samuel.ortiz@solidboot.com) wrote:
> > This is due to the irda_init fix recently added, where we call __exit
> > routines from an __init one. It is a build failure that I didn't catch
> > because it doesn't show up when building IrDA as a module. My apologies
> > for that.
> 
> What about having all of them __devinit/__devexit?

That would be completely wrong.

> 	Evgeniy Polyakov

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: [PATCH] [IrDA] Fix IrDA build failure

[Evgeniy Polyakov]

On Mon, Jul 16, 2007 at 02:07:44PM +0200, Adrian Bunk (bunk@stusta.de) wrote:
> > What about having all of them __devinit/__devexit?
> 
> That would be completely wrong.

Hi Adrian.

Then why should irda have __init/__exit at first point - replacing that
with appropriate 'dev' prefix I suggested.

-- 
	Evgeniy Polyakov

Re: [irda-users] [PATCH] [IrDA] Fix IrDA build failure

[Samuel Ortiz]

On Mon, Jul 16, 2007 at 02:17:15PM +0300, Samuel Ortiz wrote:
> Hi Dave,
> 
> When having built-in IrDA, we hit the following error:
> 
> `irda_sysctl_unregister' referenced in section `.init.text' of
> net/built-in.o: defined in discarded section `.exit.text' of
> net/built-in.o
> `irda_proc_unregister' referenced in section `.init.text' of
> net/built-in.o: defined in discarded section `.exit.text' of
> net/built-in.o
> `irsock_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> `irttp_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> `iriap_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> `irda_device_cleanup' referenced in section `.init.text' of
> net/built-in.o: defined in discarded section `.exit.text' of
> net/built-in.o
> `irlap_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> `irlmp_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> make[1]: *** [.tmp_vmlinux1] Error 1
> make: *** [_all] Error 2
> 
> This is due to the irda_init fix recently added, where we call __exit
> routines from an __init one. It is a build failure that I didn't catch
> because it doesn't show up when building IrDA as a module. My apologies
> for that.
I forgot to mention that the build fails on ARM but not on x86. As Sam
explained to me, x86 discards exit sections at runtime only, unlike ARM.
I don't know about other platforms though.

So, to hit this build failure, you need a combination of !x86 and
built-in IrDA.

Cheers,
Samuel.



> The following patch fixes that failure and is against your net-2.6
> tree. I hope it can make it to the merge window, and stable@kernel.org
> is CCed on this mail.
> 
> Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
> 
> diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
> index dcd7e32..4c670cf 100644
> --- a/net/irda/af_irda.c
> +++ b/net/irda/af_irda.c
> @@ -2567,7 +2567,7 @@ int __init irsock_init(void)
>   *    Remove IrDA protocol
>   *
>   */
> -void __exit irsock_cleanup(void)
> +void irsock_cleanup(void)
>  {
>  	sock_unregister(PF_IRDA);
>  	proto_unregister(&irda_proto);
> diff --git a/net/irda/irda_device.c b/net/irda/irda_device.c
> index 7b5def1..435b563 100644
> --- a/net/irda/irda_device.c
> +++ b/net/irda/irda_device.c
> @@ -95,14 +95,14 @@ int __init irda_device_init( void)
>  	return 0;
>  }
>  
> -static void __exit leftover_dongle(void *arg)
> +static void leftover_dongle(void *arg)
>  {
>  	struct dongle_reg *reg = arg;
>  	IRDA_WARNING("IrDA: Dongle type %x not unregistered\n",
>  		     reg->type);
>  }
>  
> -void __exit irda_device_cleanup(void)
> +void irda_device_cleanup(void)
>  {
>  	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
>  
> diff --git a/net/irda/iriap.c b/net/irda/iriap.c
> index 774eb70..ee3889f 100644
> --- a/net/irda/iriap.c
> +++ b/net/irda/iriap.c
> @@ -153,7 +153,7 @@ int __init iriap_init(void)
>   *    Initializes the IrIAP layer, called by the module cleanup code in
>   *    irmod.c
>   */
> -void __exit iriap_cleanup(void)
> +void iriap_cleanup(void)
>  {
>  	irlmp_unregister_service(service_handle);
>  
> diff --git a/net/irda/irlap.c b/net/irda/irlap.c
> index 2fc9f51..3d76aaf 100644
> --- a/net/irda/irlap.c
> +++ b/net/irda/irlap.c
> @@ -95,7 +95,7 @@ int __init irlap_init(void)
>  	return 0;
>  }
>  
> -void __exit irlap_cleanup(void)
> +void irlap_cleanup(void)
>  {
>  	IRDA_ASSERT(irlap != NULL, return;);
>  
> diff --git a/net/irda/irlmp.c b/net/irda/irlmp.c
> index 24a5e3f..7efa930 100644
> --- a/net/irda/irlmp.c
> +++ b/net/irda/irlmp.c
> @@ -116,7 +116,7 @@ int __init irlmp_init(void)
>   *    Remove IrLMP layer
>   *
>   */
> -void __exit irlmp_cleanup(void)
> +void irlmp_cleanup(void)
>  {
>  	/* Check for main structure */
>  	IRDA_ASSERT(irlmp != NULL, return;);
> diff --git a/net/irda/irproc.c b/net/irda/irproc.c
> index d6f9aba..181cb51 100644
> --- a/net/irda/irproc.c
> +++ b/net/irda/irproc.c
> @@ -84,7 +84,7 @@ void __init irda_proc_register(void)
>   *    Unregister irda entry in /proc file system
>   *
>   */
> -void __exit irda_proc_unregister(void)
> +void irda_proc_unregister(void)
>  {
>  	int i;
>  
> diff --git a/net/irda/irsysctl.c b/net/irda/irsysctl.c
> index 2e968e7..957e04f 100644
> --- a/net/irda/irsysctl.c
> +++ b/net/irda/irsysctl.c
> @@ -287,7 +287,7 @@ int __init irda_sysctl_register(void)
>   *    Unregister our sysctl interface
>   *
>   */
> -void __exit irda_sysctl_unregister(void)
> +void irda_sysctl_unregister(void)
>  {
>  	unregister_sysctl_table(irda_table_header);
>  }
> diff --git a/net/irda/irttp.c b/net/irda/irttp.c
> index 7f50832..3d7ab03 100644
> --- a/net/irda/irttp.c
> +++ b/net/irda/irttp.c
> @@ -109,7 +109,7 @@ int __init irttp_init(void)
>   *    Called by module destruction/cleanup code
>   *
>   */
> -void __exit irttp_cleanup(void)
> +void irttp_cleanup(void)
>  {
>  	/* Check for main structure */
>  	IRDA_ASSERT(irttp->magic == TTP_MAGIC, return;);
> 
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Re: [PATCH] [IrDA] Fix IrDA build failure

[Adrian Bunk]

On Mon, Jul 16, 2007 at 04:17:08PM +0400, Evgeniy Polyakov wrote:
> On Mon, Jul 16, 2007 at 02:07:44PM +0200, Adrian Bunk (bunk@stusta.de) wrote:
> > > What about having all of them __devinit/__devexit?
> > 
> > That would be completely wrong.
> 
> Hi Adrian.

Hi Evgeniy,

> Then why should irda have __init/__exit at first point

for code that only gets called during driver loading resp. driver 
unloading.

> - replacing that
> with appropriate 'dev' prefix I suggested.

You seem to misunderstand what the "dev" prefix is doing.

> 	Evgeniy Polyakov

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: [PATCH] [IrDA] Fix IrDA build failure

[Sam Ravnborg]

On Mon, Jul 16, 2007 at 03:56:26PM +0400, Evgeniy Polyakov wrote:
> Hi Samuel.
> 
> On Mon, Jul 16, 2007 at 02:17:15PM +0300, Samuel Ortiz (samuel.ortiz@solidboot.com) wrote:
> > This is due to the irda_init fix recently added, where we call __exit
> > routines from an __init one. It is a build failure that I didn't catch
> > because it doesn't show up when building IrDA as a module. My apologies
> > for that.
> 
> What about having all of them __devinit/__devexit?

__devinit is used to say that this funtion is used for hotplug so place this
in section .init.text only if !HOTPLUG.

So with __devinit/__devexit we would see exactly the same in the !HOTPLUG
case but only make it harder to trigger since the normal build has
HOTPLUG enabled.

New version of modpost will btw. catch these kind of errors so also in the
x86 case we will be notified - but then only as a warning not as an error.

	Sam

Re: [irda-users] [PATCH] [IrDA] Fix IrDA build failure

[Adrian Bunk]

On Mon, Jul 16, 2007 at 04:00:52PM +0300, Samuel Ortiz wrote:
> On Mon, Jul 16, 2007 at 02:17:15PM +0300, Samuel Ortiz wrote:
> > Hi Dave,
> > 
> > When having built-in IrDA, we hit the following error:
> > 
> > `irda_sysctl_unregister' referenced in section `.init.text' of
> > net/built-in.o: defined in discarded section `.exit.text' of
> > net/built-in.o
> > `irda_proc_unregister' referenced in section `.init.text' of
> > net/built-in.o: defined in discarded section `.exit.text' of
> > net/built-in.o
> > `irsock_cleanup' referenced in section `.init.text' of net/built-in.o:
> > defined in discarded section `.exit.text' of net/built-in.o
> > `irttp_cleanup' referenced in section `.init.text' of net/built-in.o:
> > defined in discarded section `.exit.text' of net/built-in.o
> > `iriap_cleanup' referenced in section `.init.text' of net/built-in.o:
> > defined in discarded section `.exit.text' of net/built-in.o
> > `irda_device_cleanup' referenced in section `.init.text' of
> > net/built-in.o: defined in discarded section `.exit.text' of
> > net/built-in.o
> > `irlap_cleanup' referenced in section `.init.text' of net/built-in.o:
> > defined in discarded section `.exit.text' of net/built-in.o
> > `irlmp_cleanup' referenced in section `.init.text' of net/built-in.o:
> > defined in discarded section `.exit.text' of net/built-in.o
> > make[1]: *** [.tmp_vmlinux1] Error 1
> > make: *** [_all] Error 2
> > 
> > This is due to the irda_init fix recently added, where we call __exit
> > routines from an __init one. It is a build failure that I didn't catch
> > because it doesn't show up when building IrDA as a module. My apologies
> > for that.
> I forgot to mention that the build fails on ARM but not on x86. As Sam
> explained to me, x86 discards exit sections at runtime only, unlike ARM.
> I don't know about other platforms though.
> 
> So, to hit this build failure, you need a combination of !x86 and
> built-in IrDA.

On i386 these are runtime failures (although in unlikely error paths) 
which isn't better.

> Cheers,
> Samuel.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: [PATCH] [IrDA] Fix IrDA build failure

[David Miller]

From: Samuel Ortiz <samuel.ortiz-EmnPodGKVbzby3iVrkZq2A@public.gmane.org>
Date: Mon, 16 Jul 2007 14:17:15 +0300

> When having built-in IrDA, we hit the following error:
> 
> `irda_sysctl_unregister' referenced in section `.init.text' of
> net/built-in.o: defined in discarded section `.exit.text' of
> net/built-in.o
> `irda_proc_unregister' referenced in section `.init.text' of
> net/built-in.o: defined in discarded section `.exit.text' of
> net/built-in.o
> `irsock_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> `irttp_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> `iriap_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> `irda_device_cleanup' referenced in section `.init.text' of
> net/built-in.o: defined in discarded section `.exit.text' of
> net/built-in.o
> `irlap_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> `irlmp_cleanup' referenced in section `.init.text' of net/built-in.o:
> defined in discarded section `.exit.text' of net/built-in.o
> make[1]: *** [.tmp_vmlinux1] Error 1
> make: *** [_all] Error 2
> 
> This is due to the irda_init fix recently added, where we call __exit
> routines from an __init one. It is a build failure that I didn't catch
> because it doesn't show up when building IrDA as a module. My apologies
> for that.
> The following patch fixes that failure and is against your net-2.6
> tree. I hope it can make it to the merge window, and stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
> is CCed on this mail.
> 
> Signed-off-by: Samuel Ortiz <samuel-jcdQHdrhKHMdnm+yROfE0A@public.gmane.org>

I've applied this.

I realize that alternative suggestions have been made on
how to fix this, and when consensus on that is reached someone
can send me a follow-on patch.

Thanks!

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