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From: Yinghai Lu <yinghai@kernel.org>
To: Avi Kivity <avi@redhat.com>,
	Rusty Russell <rusty@rustcorp.com.au>,
	Ingo Molnar <mingo@elte.hu>,
	Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] cpumask: alloc blank cpumask left over
Date: Sat, 06 Jun 2009 03:57:04 -0700	[thread overview]
Message-ID: <4A2A4B80.1010605@kernel.org> (raw)
In-Reply-To: <4A2A3969.5030101@redhat.com>

so sth like

---
 include/linux/cpumask.h |   15 +++++++++++++++
 lib/cpumask.c           |   12 ++++++++++++
 2 files changed, 27 insertions(+)

Index: linux-2.6/include/linux/cpumask.h
===================================================================
--- linux-2.6.orig/include/linux/cpumask.h
+++ linux-2.6/include/linux/cpumask.h
@@ -1022,6 +1022,8 @@ typedef struct cpumask *cpumask_var_t;
 
 bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node);
 bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags);
+bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node);
+bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags);
 void alloc_bootmem_cpumask_var(cpumask_var_t *mask);
 void free_cpumask_var(cpumask_var_t mask);
 void free_bootmem_cpumask_var(cpumask_var_t mask);
@@ -1040,6 +1042,19 @@ static inline bool alloc_cpumask_var_nod
 	return true;
 }
 
+static inline bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
+{
+	cpumask_clear(*mask);
+	return true;
+}
+
+static inline bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags,
+					  int node)
+{
+	cpumask_clear(*mask);
+	return true;
+}
+
 static inline void alloc_bootmem_cpumask_var(cpumask_var_t *mask)
 {
 }
Index: linux-2.6/lib/cpumask.c
===================================================================
--- linux-2.6.orig/lib/cpumask.c
+++ linux-2.6/lib/cpumask.c
@@ -119,6 +119,12 @@ bool alloc_cpumask_var_node(cpumask_var_
 }
 EXPORT_SYMBOL(alloc_cpumask_var_node);
 
+bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
+{
+	return alloc_cpumask_var_node(mask, flags | __GFP_ZERO, node);
+}
+EXPORT_SYMBOL(zalloc_cpumask_var_node);
+
 /**
  * alloc_cpumask_var - allocate a struct cpumask
  * @mask: pointer to cpumask_var_t where the cpumask is returned
@@ -135,6 +141,12 @@ bool alloc_cpumask_var(cpumask_var_t *ma
 }
 EXPORT_SYMBOL(alloc_cpumask_var);
 
+bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
+{
+	return alloc_cpumask_var(mask, flags | __GFP_ZERO);
+}
+EXPORT_SYMBOL(zalloc_cpumask_var);
+
 /**
  * alloc_bootmem_cpumask_var - allocate a struct cpumask from the bootmem arena.
  * @mask: pointer to cpumask_var_t where the cpumask is returned

  reply	other threads:[~2009-06-06 10:57 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-04 21:00 [PATCH] kvm: fix kvm reboot crash when MAXSMP is used Yinghai Lu
2009-06-04 21:01 ` [PATCH] cpumask: alloc blank cpumask left over Yinghai Lu
2009-06-05  4:58   ` Rusty Russell
2009-06-05  5:18     ` Avi Kivity
2009-06-05  5:56     ` Yinghai Lu
2009-06-05 13:41       ` Rusty Russell
2009-06-05 17:34         ` Linus Torvalds
2009-06-05 17:46           ` Yinghai Lu
2009-06-05 17:57           ` Yinghai Lu
2009-06-06 23:40             ` Rusty Russell
2009-06-06 23:43           ` Rusty Russell
2009-06-06  9:22         ` Avi Kivity
2009-06-06  9:36           ` Yinghai Lu
2009-06-06  9:39             ` Avi Kivity
2009-06-06 10:57               ` Yinghai Lu [this message]
2009-06-06 21:50                 ` [PATCH 1/6] cpumask: introduce zalloc_cpumask_var Yinghai Lu
2009-06-06 21:51                   ` Subject: [PATCH 2/6] cpumask: alloc zeroed cpumask for static cpumask_var_ts Yinghai Lu
2009-06-06 21:52                   ` [PATCH 3/6] kvm: fix kvm reboot crash when MAXSMP is used Yinghai Lu
2009-06-06 21:53                   ` [PATCH 4/6] x86/cpufreq: use cpumask_copy instead of = Yinghai Lu
2009-06-09  6:57                     ` Rusty Russell
2009-06-09  8:13                       ` Yinghai Lu
2009-06-10  4:20                         ` Rusty Russell
2009-06-10 13:39                           ` Dave Jones
2009-06-10 17:01                             ` Ingo Molnar
2009-06-09 15:46                       ` Linus Torvalds
2009-06-09 16:28                         ` Dave Jones
2009-06-09 16:41                           ` Linus Torvalds
2009-06-10  4:55                             ` Rusty Russell
2009-06-10  6:22                         ` Rusty Russell
2009-06-10 11:10                           ` S06cpuspeed/2637 is trying to acquire lock (&(&dbs_info->work)->work (was: Re: [PATCH 4/6] x86/cpufreq: use cpumask_copy instead of =) Ingo Molnar
2009-06-10 20:58                             ` Dave Jones
2009-06-11 10:52                               ` Ingo Molnar
2009-06-20 12:48                                 ` Ingo Molnar
2009-06-21 19:55                                   ` Thomas Renninger
2009-06-23 18:17                                     ` [PATCH] cpufreq: remove dbs_mutex Ingo Molnar
2009-06-23 18:40                                       ` Ingo Molnar
2009-06-23 18:51                                         ` Pallipadi, Venkatesh
2009-06-23 19:14                                           ` Ingo Molnar
2009-06-23 19:24                                             ` Pallipadi, Venkatesh
2009-06-23 19:32                                               ` Ingo Molnar
2009-06-25 14:01                                                 ` Fix dead lock in cpufreq for CPU hotplug and suspend for 2.6.30.stable Thomas Renninger
2009-06-25 14:06                                                   ` Thomas Renninger
2009-06-25 14:01                                                 ` [PATCH 1/2] CPUFREQ: Remove unneeded dbs_mutexes from ondemand and conservative governors Thomas Renninger
2009-06-25 14:25                                                   ` Mathieu Desnoyers
2009-06-25 15:03                                                     ` Pallipadi, Venkatesh
2009-06-25 22:17                                                     ` Thomas Renninger
2009-06-25 22:26                                                       ` Thomas Renninger
2009-06-30  6:33                                                   ` Pavel Machek
2009-07-03 10:10                                                     ` Thomas Renninger
2009-07-05 19:46                                                       ` Pavel Machek
2009-06-30 22:58                                                   ` [stable] " Greg KH
2009-06-30 23:14                                                     ` Mathieu Desnoyers
2009-06-30 23:39                                                       ` Greg KH
2009-07-01  9:07                                                         ` Thomas Renninger
2009-06-25 14:01                                                 ` [PATCH 2/2] remove rwsem lock from CPUFREQ_GOV_STOP call (second call site) Thomas Renninger
2009-06-10 19:42                           ` [PATCH 4/6] x86/cpufreq: use cpumask_copy instead of = Langsdorf, Mark
2009-06-11  2:34                             ` Rusty Russell
2009-09-21 16:44                               ` Langsdorf, Mark
2009-06-06 21:55                   ` [PATCH 5/6] core: use cpumask_copy instead of = for cpus_allowed in fork Yinghai Lu
2009-06-06 21:56                   ` [PATCH 6/6] x86/cpufreq: don't use SPEEDSTEP with MAXSMP Yinghai Lu
2009-06-06 21:56                   ` [PATCH 1/6] cpumask: introduce zalloc_cpumask_var Andrew Morton
2009-06-06 22:07                     ` Yinghai Lu
2009-06-06 21:58                   ` Linus Torvalds

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