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[PATCH v2 3/6] kernel/cpu.c: export __cpu_*_mask

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Exporting the cpumasks __cpu_possible_mask and friends will allow us
to remove the extra indirection through the cpu_*_mask variables. It
will also allow the set_cpu_* functions to become static inlines,
which will give a .text reduction.

Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.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 59915ea5373c..d4545a1852f2 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 fea4a3ce3011..e08db26d351b 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -772,23 +772,27 @@ 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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Thread

[PATCH v2 0/6] kernel/cpu.c: eliminate some indirection Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2015-10-06 17:30 +0200
  [PATCH v2 3/6] kernel/cpu.c: export __cpu_*_mask Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2015-10-06 17:30 +0200
  [PATCH v2 5/6] kernel/cpu.c: eliminate cpu_*_mask Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2015-10-06 17:30 +0200
  [PATCH v2 4/6] drivers/base/cpu.c: use __cpu_*_mask directly Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2015-10-06 17:30 +0200
  [PATCH v2 6/6] kernel/cpu.c: make set_cpu_* static inlines Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2015-10-06 17:30 +0200
  [PATCH v2 2/6] kernel/cpu.c: change type of cpu_possible_bits and friends Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2015-10-06 17:30 +0200
  [PATCH v2 1/6] powerpc/fadump: rename cpu_online_mask member of struct fadump_crash_info_header Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2015-10-06 17:40 +0200
  Re: [PATCH v2 0/6] kernel/cpu.c: eliminate some indirection Rasmus Villemoes <rv@rasmusvillemoes.dk> - 2015-10-18 00:10 +0200
    Re: [PATCH v2 0/6] kernel/cpu.c: eliminate some indirection Rusty Russell <rusty@rustcorp.com.au> - 2015-10-18 04:30 +0200

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