subject:"\[PATCH\] \[REVIEW\] Fix irqpoll on IA64 \(timer interrupt \!= 0\)"

Re: [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Thomas Gleixner

On Mon, 2007-03-19 at 19:13 +0100, Bernhard Walle wrote:
> That requires changes in Linux-generic files. The default of timer_irq is 0, 
> so
> the patch doesn't break i386/x86_64. However, other platforms also may also
> have a timer interrupt non-equal to zero, so they can also use the new
> set_timer_interrupt() function.
> 
> The patch is against 2.6.21-rc4. Please give me your input how to improve
> the way it's done if you don't like the way I did the change. irqpoll is
> required to work with kdump in some situations and that's why I discovered
> that kdump doesn't work on that platform (HP rx2660).
> 
> 
> Signed-off-by: Bernhard Walle <[EMAIL PROTECTED]>

Acked-by: Thomas Gleixner <[EMAIL PROTECTED]>



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Re: [Fastboot] [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Jesper Juhl


On 19/03/07, Bernhard Walle <[EMAIL PROTECTED]> wrote:

* Jesper Juhl <[EMAIL PROTECTED]> [2007-03-19 19:29]:
> >
> > -void
> > +int
> >  register_percpu_irq (ia64_vector vec, struct irqaction *action)
> >  {
>
> Each and every function example in Documentation/CodingStyle has the
> return type on the same line as the function name, so why not get
> these in-line while you are modifying them anyway?

Because all other functions in that file are coded this way. I think
it looks better if you don't change the style in a particular file.
Am I wrong?


Consistency within the file certainly makes sense.

--
Jesper Juhl <[EMAIL PROTECTED]>
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Re: [Fastboot] [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Bernhard Walle

* Jesper Juhl <[EMAIL PROTECTED]> [2007-03-19 19:29]:
> >
> > -void
> > +int
> >  register_percpu_irq (ia64_vector vec, struct irqaction *action)
> >  {
> 
> Each and every function example in Documentation/CodingStyle has the
> return type on the same line as the function name, so why not get
> these in-line while you are modifying them anyway?

Because all other functions in that file are coded this way. I think
it looks better if you don't change the style in a particular file.
Am I wrong?

> int register_percpu_irq (ia64_vector vec, struct irqaction *action)
> 
> 
> > @@ -174,6 +175,13 @@ void note_interrupt(unsigned int irq, st
> > desc->irqs_unhandled = 0;
> >  }
> >
> > +
> > +void set_timer_interrupt(unsigned int irq)
> 
> Just one blank line between functions, as pr CodingStyle:
>"In source files, separate functions with one blank line.  ..."

Fixed (locally). I'll repost if I get feedback of the contents of the
patch.


Regards,
Bernhard

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Re: [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Jesper Juhl


On 19/03/07, Bernhard Walle <[EMAIL PROTECTED]> wrote:

On IA64, the timer interrupt is not (always?) zero as it is on x86 platforms.
Also, the timer interrupt is CPU-local. Two things need to be changed to make
the irqpoll option make also working on IA64:

  o Call note_interrupt() also on CPU-local interrupts in __do_IRQ().
  o Set a variable timer_irq to the value of the timer interrupt
after the timer interrupt has been registered and assigned.

That requires changes in Linux-generic files. The default of timer_irq is 0, so
the patch doesn't break i386/x86_64. However, other platforms also may also
have a timer interrupt non-equal to zero, so they can also use the new
set_timer_interrupt() function.

The patch is against 2.6.21-rc4. Please give me your input how to improve
the way it's done if you don't like the way I did the change. irqpoll is
required to work with kdump in some situations and that's why I discovered
that kdump doesn't work on that platform (HP rx2660).



A few style comments below.



Signed-off-by: Bernhard Walle <[EMAIL PROTECTED]>

---
 arch/ia64/kernel/irq_ia64.c |6 +-
 arch/ia64/kernel/time.c |6 +-
 include/asm-ia64/hw_irq.h   |2 +-
 include/linux/irq.h |3 +++
 kernel/irq/handle.c |2 ++
 kernel/irq/spurious.c   |   10 +-
 6 files changed, 25 insertions(+), 4 deletions(-)

Index: mainline-msi-init/arch/ia64/kernel/irq_ia64.c
===
--- mainline-msi-init.orig/arch/ia64/kernel/irq_ia64.c
+++ mainline-msi-init/arch/ia64/kernel/irq_ia64.c
@@ -280,11 +280,12 @@ static struct irqaction resched_irqactio
 };
 #endif

-void
+int
 register_percpu_irq (ia64_vector vec, struct irqaction *action)
 {


Each and every function example in Documentation/CodingStyle has the
return type on the same line as the function name, so why not get
these in-line while you are modifying them anyway?

int register_percpu_irq (ia64_vector vec, struct irqaction *action)



@@ -174,6 +175,13 @@ void note_interrupt(unsigned int irq, st
desc->irqs_unhandled = 0;
 }

+
+void set_timer_interrupt(unsigned int irq)


Just one blank line between functions, as pr CodingStyle:
  "In source files, separate functions with one blank line.  ..."


--
Jesper Juhl <[EMAIL PROTECTED]>
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-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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[PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Bernhard Walle

On IA64, the timer interrupt is not (always?) zero as it is on x86 platforms.
Also, the timer interrupt is CPU-local. Two things need to be changed to make
the irqpoll option make also working on IA64:

  o Call note_interrupt() also on CPU-local interrupts in __do_IRQ().
  o Set a variable timer_irq to the value of the timer interrupt
after the timer interrupt has been registered and assigned.

That requires changes in Linux-generic files. The default of timer_irq is 0, so
the patch doesn't break i386/x86_64. However, other platforms also may also
have a timer interrupt non-equal to zero, so they can also use the new
set_timer_interrupt() function.

The patch is against 2.6.21-rc4. Please give me your input how to improve
the way it's done if you don't like the way I did the change. irqpoll is
required to work with kdump in some situations and that's why I discovered
that kdump doesn't work on that platform (HP rx2660).


Signed-off-by: Bernhard Walle <[EMAIL PROTECTED]>

---
 arch/ia64/kernel/irq_ia64.c |6 +-
 arch/ia64/kernel/time.c |6 +-
 include/asm-ia64/hw_irq.h   |2 +-
 include/linux/irq.h |3 +++
 kernel/irq/handle.c |2 ++
 kernel/irq/spurious.c   |   10 +-
 6 files changed, 25 insertions(+), 4 deletions(-)

Index: mainline-msi-init/arch/ia64/kernel/irq_ia64.c
===
--- mainline-msi-init.orig/arch/ia64/kernel/irq_ia64.c
+++ mainline-msi-init/arch/ia64/kernel/irq_ia64.c
@@ -280,11 +280,12 @@ static struct irqaction resched_irqactio
 };
 #endif
 
-void
+int
 register_percpu_irq (ia64_vector vec, struct irqaction *action)
 {
irq_desc_t *desc;
unsigned int irq;
+   int first_match = -1;
 
for (irq = 0; irq < NR_IRQS; ++irq)
if (irq_to_vector(irq) == vec) {
@@ -293,7 +294,10 @@ register_percpu_irq (ia64_vector vec, st
desc->chip = _type_ia64_lsapic;
if (action)
setup_irq(irq, action);
+   first_match = irq;
}
+
+   return first_match;
 }
 
 void __init
Index: mainline-msi-init/arch/ia64/kernel/time.c
===
--- mainline-msi-init.orig/arch/ia64/kernel/time.c
+++ mainline-msi-init/arch/ia64/kernel/time.c
@@ -247,7 +247,11 @@ void __devinit ia64_disable_timer(void)
 void __init
 time_init (void)
 {
-   register_percpu_irq(IA64_TIMER_VECTOR, _irqaction);
+   int timer_irq;
+
+   timer_irq = register_percpu_irq(IA64_TIMER_VECTOR, _irqaction);
+   set_timer_interrupt(timer_irq);
+
efi_gettimeofday();
ia64_init_itm();
 
Index: mainline-msi-init/include/linux/irq.h
===
--- mainline-msi-init.orig/include/linux/irq.h
+++ mainline-msi-init/include/linux/irq.h
@@ -272,6 +272,9 @@ static inline int irq_balancing_disabled
 /* Handle irq action chains: */
 extern int handle_IRQ_event(unsigned int irq, struct irqaction *action);
 
+/* sets the timer interrupt number for irqpoll handling 
(kernel/irq/spurious.c) */
+extern void set_timer_interrupt(unsigned int irq);
+
 /*
  * Built-in IRQ handlers for various IRQ types,
  * callable via desc->chip->handle_irq()
Index: mainline-msi-init/kernel/irq/spurious.c
===
--- mainline-msi-init.orig/kernel/irq/spurious.c
+++ mainline-msi-init/kernel/irq/spurious.c
@@ -12,6 +12,7 @@
 #include 
 
 static int irqfixup __read_mostly;
+static unsigned int timer_irq __read_mostly;
 
 /*
  * Recovery handler for misrouted interrupts.
@@ -146,7 +147,7 @@ void note_interrupt(unsigned int irq, st
 
if (unlikely(irqfixup)) {
/* Don't punish working computers */
-   if ((irqfixup == 2 && irq == 0) || action_ret == IRQ_NONE) {
+   if ((irqfixup == 2 && irq == timer_irq) || action_ret == 
IRQ_NONE) {
int ok = misrouted_irq(irq);
if (action_ret == IRQ_NONE)
desc->irqs_unhandled -= ok;
@@ -174,6 +175,13 @@ void note_interrupt(unsigned int irq, st
desc->irqs_unhandled = 0;
 }
 
+
+void set_timer_interrupt(unsigned int irq)
+{
+   timer_irq = irq;
+}
+EXPORT_SYMBOL_GPL(set_timer_interrupt);
+
 int noirqdebug __read_mostly;
 
 int noirqdebug_setup(char *str)
Index: mainline-msi-init/include/asm-ia64/hw_irq.h
===
--- mainline-msi-init.orig/include/asm-ia64/hw_irq.h
+++ mainline-msi-init/include/asm-ia64/hw_irq.h
@@ -95,7 +95,7 @@ extern int assign_irq_vector (int irq);   
 extern void free_irq_vector (int vector);
 extern int reserve_irq_vector (int vector);
 extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int 
redirect);
-extern void register_percpu_irq (ia64_vector vec,

[PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Bernhard Walle

On IA64, the timer interrupt is not (always?) zero as it is on x86 platforms.
Also, the timer interrupt is CPU-local. Two things need to be changed to make
the irqpoll option make also working on IA64:

  o Call note_interrupt() also on CPU-local interrupts in __do_IRQ().
  o Set a variable timer_irq to the value of the timer interrupt
after the timer interrupt has been registered and assigned.

That requires changes in Linux-generic files. The default of timer_irq is 0, so
the patch doesn't break i386/x86_64. However, other platforms also may also
have a timer interrupt non-equal to zero, so they can also use the new
set_timer_interrupt() function.

The patch is against 2.6.21-rc4. Please give me your input how to improve
the way it's done if you don't like the way I did the change. irqpoll is
required to work with kdump in some situations and that's why I discovered
that kdump doesn't work on that platform (HP rx2660).


Signed-off-by: Bernhard Walle [EMAIL PROTECTED]

---
 arch/ia64/kernel/irq_ia64.c |6 +-
 arch/ia64/kernel/time.c |6 +-
 include/asm-ia64/hw_irq.h   |2 +-
 include/linux/irq.h |3 +++
 kernel/irq/handle.c |2 ++
 kernel/irq/spurious.c   |   10 +-
 6 files changed, 25 insertions(+), 4 deletions(-)

Index: mainline-msi-init/arch/ia64/kernel/irq_ia64.c
===
--- mainline-msi-init.orig/arch/ia64/kernel/irq_ia64.c
+++ mainline-msi-init/arch/ia64/kernel/irq_ia64.c
@@ -280,11 +280,12 @@ static struct irqaction resched_irqactio
 };
 #endif
 
-void
+int
 register_percpu_irq (ia64_vector vec, struct irqaction *action)
 {
irq_desc_t *desc;
unsigned int irq;
+   int first_match = -1;
 
for (irq = 0; irq  NR_IRQS; ++irq)
if (irq_to_vector(irq) == vec) {
@@ -293,7 +294,10 @@ register_percpu_irq (ia64_vector vec, st
desc-chip = irq_type_ia64_lsapic;
if (action)
setup_irq(irq, action);
+   first_match = irq;
}
+
+   return first_match;
 }
 
 void __init
Index: mainline-msi-init/arch/ia64/kernel/time.c
===
--- mainline-msi-init.orig/arch/ia64/kernel/time.c
+++ mainline-msi-init/arch/ia64/kernel/time.c
@@ -247,7 +247,11 @@ void __devinit ia64_disable_timer(void)
 void __init
 time_init (void)
 {
-   register_percpu_irq(IA64_TIMER_VECTOR, timer_irqaction);
+   int timer_irq;
+
+   timer_irq = register_percpu_irq(IA64_TIMER_VECTOR, timer_irqaction);
+   set_timer_interrupt(timer_irq);
+
efi_gettimeofday(xtime);
ia64_init_itm();
 
Index: mainline-msi-init/include/linux/irq.h
===
--- mainline-msi-init.orig/include/linux/irq.h
+++ mainline-msi-init/include/linux/irq.h
@@ -272,6 +272,9 @@ static inline int irq_balancing_disabled
 /* Handle irq action chains: */
 extern int handle_IRQ_event(unsigned int irq, struct irqaction *action);
 
+/* sets the timer interrupt number for irqpoll handling 
(kernel/irq/spurious.c) */
+extern void set_timer_interrupt(unsigned int irq);
+
 /*
  * Built-in IRQ handlers for various IRQ types,
  * callable via desc-chip-handle_irq()
Index: mainline-msi-init/kernel/irq/spurious.c
===
--- mainline-msi-init.orig/kernel/irq/spurious.c
+++ mainline-msi-init/kernel/irq/spurious.c
@@ -12,6 +12,7 @@
 #include linux/interrupt.h
 
 static int irqfixup __read_mostly;
+static unsigned int timer_irq __read_mostly;
 
 /*
  * Recovery handler for misrouted interrupts.
@@ -146,7 +147,7 @@ void note_interrupt(unsigned int irq, st
 
if (unlikely(irqfixup)) {
/* Don't punish working computers */
-   if ((irqfixup == 2  irq == 0) || action_ret == IRQ_NONE) {
+   if ((irqfixup == 2  irq == timer_irq) || action_ret == 
IRQ_NONE) {
int ok = misrouted_irq(irq);
if (action_ret == IRQ_NONE)
desc-irqs_unhandled -= ok;
@@ -174,6 +175,13 @@ void note_interrupt(unsigned int irq, st
desc-irqs_unhandled = 0;
 }
 
+
+void set_timer_interrupt(unsigned int irq)
+{
+   timer_irq = irq;
+}
+EXPORT_SYMBOL_GPL(set_timer_interrupt);
+
 int noirqdebug __read_mostly;
 
 int noirqdebug_setup(char *str)
Index: mainline-msi-init/include/asm-ia64/hw_irq.h
===
--- mainline-msi-init.orig/include/asm-ia64/hw_irq.h
+++ mainline-msi-init/include/asm-ia64/hw_irq.h
@@ -95,7 +95,7 @@ extern int assign_irq_vector (int irq);   
 extern void free_irq_vector (int vector);
 extern int reserve_irq_vector (int vector);
 extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int 
redirect);
-extern void register_percpu_irq

Re: [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Jesper Juhl


On 19/03/07, Bernhard Walle [EMAIL PROTECTED] wrote:

On IA64, the timer interrupt is not (always?) zero as it is on x86 platforms.
Also, the timer interrupt is CPU-local. Two things need to be changed to make
the irqpoll option make also working on IA64:

  o Call note_interrupt() also on CPU-local interrupts in __do_IRQ().
  o Set a variable timer_irq to the value of the timer interrupt
after the timer interrupt has been registered and assigned.

That requires changes in Linux-generic files. The default of timer_irq is 0, so
the patch doesn't break i386/x86_64. However, other platforms also may also
have a timer interrupt non-equal to zero, so they can also use the new
set_timer_interrupt() function.

The patch is against 2.6.21-rc4. Please give me your input how to improve
the way it's done if you don't like the way I did the change. irqpoll is
required to work with kdump in some situations and that's why I discovered
that kdump doesn't work on that platform (HP rx2660).



A few style comments below.



Signed-off-by: Bernhard Walle [EMAIL PROTECTED]

---
 arch/ia64/kernel/irq_ia64.c |6 +-
 arch/ia64/kernel/time.c |6 +-
 include/asm-ia64/hw_irq.h   |2 +-
 include/linux/irq.h |3 +++
 kernel/irq/handle.c |2 ++
 kernel/irq/spurious.c   |   10 +-
 6 files changed, 25 insertions(+), 4 deletions(-)

Index: mainline-msi-init/arch/ia64/kernel/irq_ia64.c
===
--- mainline-msi-init.orig/arch/ia64/kernel/irq_ia64.c
+++ mainline-msi-init/arch/ia64/kernel/irq_ia64.c
@@ -280,11 +280,12 @@ static struct irqaction resched_irqactio
 };
 #endif

-void
+int
 register_percpu_irq (ia64_vector vec, struct irqaction *action)
 {


Each and every function example in Documentation/CodingStyle has the
return type on the same line as the function name, so why not get
these in-line while you are modifying them anyway?

int register_percpu_irq (ia64_vector vec, struct irqaction *action)



@@ -174,6 +175,13 @@ void note_interrupt(unsigned int irq, st
desc-irqs_unhandled = 0;
 }

+
+void set_timer_interrupt(unsigned int irq)


Just one blank line between functions, as pr CodingStyle:
  In source files, separate functions with one blank line.  ...


--
Jesper Juhl [EMAIL PROTECTED]
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please  http://www.expita.com/nomime.html
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Re: [Fastboot] [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Bernhard Walle

* Jesper Juhl [EMAIL PROTECTED] [2007-03-19 19:29]:
 
  -void
  +int
   register_percpu_irq (ia64_vector vec, struct irqaction *action)
   {
 
 Each and every function example in Documentation/CodingStyle has the
 return type on the same line as the function name, so why not get
 these in-line while you are modifying them anyway?

Because all other functions in that file are coded this way. I think
it looks better if you don't change the style in a particular file.
Am I wrong?

 int register_percpu_irq (ia64_vector vec, struct irqaction *action)
 
 
  @@ -174,6 +175,13 @@ void note_interrupt(unsigned int irq, st
  desc-irqs_unhandled = 0;
   }
 
  +
  +void set_timer_interrupt(unsigned int irq)
 
 Just one blank line between functions, as pr CodingStyle:
In source files, separate functions with one blank line.  ...

Fixed (locally). I'll repost if I get feedback of the contents of the
patch.


Regards,
Bernhard

-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
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Re: [Fastboot] [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Jesper Juhl


On 19/03/07, Bernhard Walle [EMAIL PROTECTED] wrote:

* Jesper Juhl [EMAIL PROTECTED] [2007-03-19 19:29]:
 
  -void
  +int
   register_percpu_irq (ia64_vector vec, struct irqaction *action)
   {

 Each and every function example in Documentation/CodingStyle has the
 return type on the same line as the function name, so why not get
 these in-line while you are modifying them anyway?

Because all other functions in that file are coded this way. I think
it looks better if you don't change the style in a particular file.
Am I wrong?


Consistency within the file certainly makes sense.

--
Jesper Juhl [EMAIL PROTECTED]
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please  http://www.expita.com/nomime.html
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
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Please read the FAQ at  http://www.tux.org/lkml/

Re: [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

2007-03-19 Thread Thomas Gleixner

On Mon, 2007-03-19 at 19:13 +0100, Bernhard Walle wrote:
 That requires changes in Linux-generic files. The default of timer_irq is 0, 
 so
 the patch doesn't break i386/x86_64. However, other platforms also may also
 have a timer interrupt non-equal to zero, so they can also use the new
 set_timer_interrupt() function.
 
 The patch is against 2.6.21-rc4. Please give me your input how to improve
 the way it's done if you don't like the way I did the change. irqpoll is
 required to work with kdump in some situations and that's why I discovered
 that kdump doesn't work on that platform (HP rx2660).
 
 
 Signed-off-by: Bernhard Walle [EMAIL PROTECTED]

Acked-by: Thomas Gleixner [EMAIL PROTECTED]



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the body of a message to [EMAIL PROTECTED]
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Re: [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

Re: [Fastboot] [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

Re: [Fastboot] [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

Re: [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

[PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

[PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

Re: [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

Re: [Fastboot] [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

Re: [Fastboot] [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

Re: [PATCH] [REVIEW] Fix irqpoll on IA64 (timer interrupt != 0)

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