linux-kernel - [PATCH 2/5] kernel/cpu.c: export __cpu_xyz

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Date:	Thu,  7 May 2015 00:52:51 +0200
From:	Rasmus Villemoes <linux@...musvillemoes.dk>
To:	Ingo Molnar <mingo@...nel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Rasmus Villemoes <linux@...musvillemoes.dk>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/5] kernel/cpu.c: export __cpu_xyz_mask

Exporting these cpumasks will allow us to remove the extra indirection
through the cpu_xyz_mask variables. It will also allow the set_cpu_xyz
functions to become static inlines, which will give a .text reduction.

Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 include/linux/cpumask.h |  4 ++++
 kernel/cpu.c            | 14 +++++++++-----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 27e285b92b5f..1842df8c1d29 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -89,6 +89,10 @@ 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;
 
 #if NR_CPUS > 1
 #define num_online_cpus()	cpumask_weight(cpu_online_mask)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index de38b31b4a3d..852922a793a3 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -755,23 +755,27 @@ const DECLARE_BITMAP(cpu_all_bits, NR_CPUS) = CPU_BITS_ALL;
 EXPORT_SYMBOL(cpu_all_bits);
 
 #ifdef CONFIG_INIT_ALL_POSSIBLE
-static struct cpumask __cpu_possible_mask __read_mostly
+struct cpumask __cpu_possible_mask __read_mostly
 	= {CPU_BITS_ALL};
 #else
-static 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);
 
-static struct cpumask __cpu_online_mask __read_mostly;
+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);
 
-static struct cpumask __cpu_present_mask __read_mostly;
+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);
 
-static struct cpumask __cpu_active_mask __read_mostly;
+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);
 
-- 
2.1.3

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