linux-kernel - Re: [patch 10/34] Xen-pv_ops: Simplify smp_call_function*() by using common implementation

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Date:	Thu, 15 Mar 2007 19:38:04 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andi Kleen <ak@....de>, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, virtualization@...ts.osdl.org,
	xen-devel@...ts.xensource.com, Chris Wright <chrisw@...s-sol.org>,
	Zachary Amsden <zach@...are.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Stephane Eranian <eranian@....hp.com>,
	Andrew Morton <akpm@...l.org>, Andi Kleen <ak@...e.de>,
	"Randy.Dunlap" <rdunlap@...otime.net>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch 10/34] Xen-pv_ops: Simplify smp_call_function*() by
 using common implementation

On Tue, 13 Mar 2007 16:30:27 -0700 Jeremy Fitzhardinge wrote:

> smp_call_function and smp_call_function_single are almost complete
> duplicates of the same logic.  This patch combines them by
> implementing them in terms of the more general
> smp_call_function_mask().

The kernel-doc is still not quite correct.  Patch below applies
on top of this patch from Jeremy.
---

From: Randy Dunlap <randy.dunlap@...cle.com>

Clean up arch/i386/kernel/smp.c after the Xen pv_ops patches for
smp_call_function variants.

Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>
---
 arch/i386/kernel/smp.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- linux-2621-rc3.orig/arch/i386/kernel/smp.c
+++ linux-2621-rc3/arch/i386/kernel/smp.c
@@ -517,14 +517,14 @@ static struct call_data_struct *call_dat
 
 
 /**
- * smp_call_function_mask(): Run a function on a set of other CPUs.
+ * smp_call_function_mask - Run a function on a set of other CPUs.
  * @mask: The set of cpus to run on.  Must not include the current cpu.
  * @func: The function to run. This must be fast and non-blocking.
  * @info: An arbitrary pointer to pass to the function.
  * @wait: If true, wait (atomically) until function has completed on other CPUs.
  *
  * Returns 0 on success, else a negative status code. Does not return until
- * remote CPUs are nearly ready to execute <<func>> or are or have finished.
+ * remote CPUs are nearly ready to execute func() or are or have finished.
  *
  * You must not call this function with disabled interrupts or from a
  * hardware interrupt handler or from a bottom half handler.
@@ -583,14 +583,14 @@ int smp_call_function_mask(cpumask_t mas
 }
 
 /**
- * smp_call_function(): Run a function on all other CPUs.
+ * smp_call_function - Run a function on all other CPUs.
  * @func: The function to run. This must be fast and non-blocking.
  * @info: An arbitrary pointer to pass to the function.
  * @nonatomic: currently unused.
  * @wait: If true, wait (atomically) until function has completed on other CPUs.
  *
  * Returns 0 on success, else a negative status code. Does not return until
- * remote CPUs are nearly ready to execute <<func>> or are or have executed.
+ * remote CPUs are nearly ready to execute func() or are or have executed.
  *
  * You must not call this function with disabled interrupts or from a
  * hardware interrupt handler or from a bottom half handler.
@@ -602,8 +602,9 @@ int smp_call_function(void (*func) (void
 }
 EXPORT_SYMBOL(smp_call_function);
 
-/*
+/**
  * smp_call_function_single - Run a function on another CPU
+ * @cpu: The target (destination) CPU number.
  * @func: The function to run. This must be fast and non-blocking.
  * @info: An arbitrary pointer to pass to the function.
  * @nonatomic: Currently unused.
@@ -611,7 +612,7 @@ EXPORT_SYMBOL(smp_call_function);
  *
  * Retrurns 0 on success, else a negative status code.
  *
- * Does not return until the remote CPU is nearly ready to execute <func>
+ * Does not return until the remote CPU is nearly ready to execute func()
  * or is or has executed.
  */
 int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
-
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