linux-kernel - [PATCH v2, resend 5/6] kernel/cpu.c: eliminate cpu_*

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Message-Id: <1448308300-22582-6-git-send-email-linux@rasmusvillemoes.dk>
Date:	Mon, 23 Nov 2015 20:51:39 +0100
From:	Rasmus Villemoes <linux@...musvillemoes.dk>
To:	Rusty Russell <rusty@...tcorp.com.au>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michael Ellerman <mpe@...erman.id.au>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2, resend 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 <rusty@...tcorp.com.au>
Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 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 35d1d45be8e9..8734fc74fcbc 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -765,23 +765,15 @@ struct cpumask __cpu_possible_mask __read_mostly
 struct cpumask __cpu_possible_mask __read_mostly;
 #endif
 EXPORT_SYMBOL(__cpu_possible_mask);
-const struct cpumask *const cpu_possible_mask = &__cpu_possible_mask;
-EXPORT_SYMBOL(cpu_possible_mask);
 
 struct cpumask __cpu_online_mask __read_mostly;
 EXPORT_SYMBOL(__cpu_online_mask);
-const struct cpumask *const cpu_online_mask = &__cpu_online_mask;
-EXPORT_SYMBOL(cpu_online_mask);
 
 struct cpumask __cpu_present_mask __read_mostly;
 EXPORT_SYMBOL(__cpu_present_mask);
-const struct cpumask *const cpu_present_mask = &__cpu_present_mask;
-EXPORT_SYMBOL(cpu_present_mask);
 
 struct cpumask __cpu_active_mask __read_mostly;
 EXPORT_SYMBOL(__cpu_active_mask);
-const struct cpumask *const cpu_active_mask = &__cpu_active_mask;
-EXPORT_SYMBOL(cpu_active_mask);
 
 void set_cpu_possible(unsigned int cpu, bool possible)
 {
-- 
2.6.1

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