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Date:	Tue,  6 Oct 2015 17:21:58 +0200
From:	Rasmus Villemoes <>
To:	Rusty Russell <>,
	Greg Kroah-Hartman <>,
	Oleg Nesterov <>,
	Thomas Gleixner <>
Cc:	Michael Ellerman <>,
	Rasmus Villemoes <>,
Subject: [PATCH v2 5/6] kernel/cpu.c: eliminate cpu_*_mask

Replace the variables cpu_possible_mask, cpu_online_mask,
cpu_present_mask and cpu_active_mask with macros expanding to
expressions of the same type and value, eliminating some indirection.

Acked-by: Rusty Russell <>
Signed-off-by: Rasmus Villemoes <>
 include/linux/cpumask.h | 8 ++++----
 kernel/cpu.c            | 8 --------
 2 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index d4545a1852f2..52ab539aefce 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -85,14 +85,14 @@ extern int nr_cpu_ids;
  *    only one CPU.
-extern const struct cpumask *const cpu_possible_mask;
-extern const struct cpumask *const cpu_online_mask;
-extern const struct cpumask *const cpu_present_mask;
-extern const struct cpumask *const cpu_active_mask;
 extern struct cpumask __cpu_possible_mask;
 extern struct cpumask __cpu_online_mask;
 extern struct cpumask __cpu_present_mask;
 extern struct cpumask __cpu_active_mask;
+#define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask)
+#define cpu_online_mask   ((const struct cpumask *)&__cpu_online_mask)
+#define cpu_present_mask  ((const struct cpumask *)&__cpu_present_mask)
+#define cpu_active_mask   ((const struct cpumask *)&__cpu_active_mask)
 #if NR_CPUS > 1
 #define num_online_cpus()	cpumask_weight(cpu_online_mask)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index e08db26d351b..dd70f600442f 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -778,23 +778,15 @@ struct cpumask __cpu_possible_mask __read_mostly
 struct cpumask __cpu_possible_mask __read_mostly;
-const struct cpumask *const cpu_possible_mask = &__cpu_possible_mask;
 struct cpumask __cpu_online_mask __read_mostly;
-const struct cpumask *const cpu_online_mask = &__cpu_online_mask;
 struct cpumask __cpu_present_mask __read_mostly;
-const struct cpumask *const cpu_present_mask = &__cpu_present_mask;
 struct cpumask __cpu_active_mask __read_mostly;
-const struct cpumask *const cpu_active_mask = &__cpu_active_mask;
 void set_cpu_possible(unsigned int cpu, bool possible)

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