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authorMarc Zyngier <marc.zyngier@arm.com>2012-06-12 14:16:27 +0400
committerArnd Bergmann <arnd@arndb.de>2012-09-14 13:15:01 +0400
commit28e8e29c616f947348cc66bea684d0035c76021a (patch)
treee60188267452962f522f5c94ca77546257c8466a /arch
parentac6c7998712d55bd15aa2dd5ae85f5988c0cb526 (diff)
downloadlinux-28e8e29c616f947348cc66bea684d0035c76021a.tar.xz
ARM: consolidate pen_release instead of having per platform definitions
Almost each SMP platform defines pen_release to manage booting secondary CPUs. This of course clashes with the single zImage effort. Add the pen_release definition to the ARM SMP code, and remove all others. This should only be used by platforms which lack any kind of CPU power management... Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/smp.h1
-rw-r--r--arch/arm/kernel/smp.c6
-rw-r--r--arch/arm/mach-exynos/hotplug.c2
-rw-r--r--arch/arm/mach-exynos/platsmp.c7
-rw-r--r--arch/arm/mach-msm/hotplug.c2
-rw-r--r--arch/arm/mach-msm/platsmp.c5
-rw-r--r--arch/arm/mach-realview/hotplug.c2
-rw-r--r--arch/arm/mach-spear13xx/hotplug.c2
-rw-r--r--arch/arm/mach-spear13xx/platsmp.c5
-rw-r--r--arch/arm/mach-ux500/hotplug.c2
-rw-r--r--arch/arm/mach-ux500/platsmp.c6
-rw-r--r--arch/arm/mach-vexpress/hotplug.c2
-rw-r--r--arch/arm/plat-versatile/platsmp.c6
13 files changed, 7 insertions, 41 deletions
diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
index 3a8cfee26c91..2e3be16c6766 100644
--- a/arch/arm/include/asm/smp.h
+++ b/arch/arm/include/asm/smp.h
@@ -70,6 +70,7 @@ struct secondary_data {
void *stack;
};
extern struct secondary_data secondary_data;
+extern volatile int pen_release;
extern int __cpu_disable(void);
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index ac3ce029afb8..aa4ffe6e5ecf 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -51,6 +51,12 @@
*/
struct secondary_data secondary_data;
+/*
+ * control for which core is the next to come out of the secondary
+ * boot "holding pen"
+ */
+volatile int __cpuinitdata pen_release = -1;
+
enum ipi_msg_type {
IPI_TIMER = 2,
IPI_RESCHEDULE,
diff --git a/arch/arm/mach-exynos/hotplug.c b/arch/arm/mach-exynos/hotplug.c
index edccc36dd692..f4d7dd20cdac 100644
--- a/arch/arm/mach-exynos/hotplug.c
+++ b/arch/arm/mach-exynos/hotplug.c
@@ -23,8 +23,6 @@
#include "common.h"
-extern volatile int pen_release;
-
static inline void cpu_enter_lowpower(void)
{
unsigned int v;
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index 3fad8ad3f92c..8d57e4223bdb 100644
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -40,13 +40,6 @@ extern void exynos4_secondary_startup(void);
S5P_INFORM5 : S5P_VA_SYSRAM)
/*
- * control for which core is the next to come out of the secondary
- * boot "holding pen"
- */
-
-volatile int __cpuinitdata pen_release = -1;
-
-/*
* Write pen_release in a way that is guaranteed to be visible to all
* observers, irrespective of whether they're taking part in coherency
* or not. This is necessary for the hotplug code to work reliably.
diff --git a/arch/arm/mach-msm/hotplug.c b/arch/arm/mach-msm/hotplug.c
index fedaa25b2935..002ac1e47235 100644
--- a/arch/arm/mach-msm/hotplug.c
+++ b/arch/arm/mach-msm/hotplug.c
@@ -15,8 +15,6 @@
#include "core.h"
-extern volatile int pen_release;
-
static inline void cpu_enter_lowpower(void)
{
/* Just flush the cache. Changing the coherency is not yet
diff --git a/arch/arm/mach-msm/platsmp.c b/arch/arm/mach-msm/platsmp.c
index ba3c4b0d523d..57af32ef75ed 100644
--- a/arch/arm/mach-msm/platsmp.c
+++ b/arch/arm/mach-msm/platsmp.c
@@ -35,11 +35,6 @@
#define GIC_PPI_EDGE_MASK 0xFFFFD7FF
extern void msm_secondary_startup(void);
-/*
- * control for which core is the next to come out of the secondary
- * boot "holding pen".
- */
-volatile int pen_release = -1;
static DEFINE_SPINLOCK(boot_lock);
diff --git a/arch/arm/mach-realview/hotplug.c b/arch/arm/mach-realview/hotplug.c
index fef4f4495225..53818e5cd3ad 100644
--- a/arch/arm/mach-realview/hotplug.c
+++ b/arch/arm/mach-realview/hotplug.c
@@ -16,8 +16,6 @@
#include <asm/cp15.h>
#include <asm/smp_plat.h>
-extern volatile int pen_release;
-
static inline void cpu_enter_lowpower(void)
{
unsigned int v;
diff --git a/arch/arm/mach-spear13xx/hotplug.c b/arch/arm/mach-spear13xx/hotplug.c
index 485fd4367bb1..a7d2dd11a4f2 100644
--- a/arch/arm/mach-spear13xx/hotplug.c
+++ b/arch/arm/mach-spear13xx/hotplug.c
@@ -17,8 +17,6 @@
#include <asm/cp15.h>
#include <asm/smp_plat.h>
-extern volatile int pen_release;
-
static inline void cpu_enter_lowpower(void)
{
unsigned int v;
diff --git a/arch/arm/mach-spear13xx/platsmp.c b/arch/arm/mach-spear13xx/platsmp.c
index 806343c7b5d8..2eaa3fa7b432 100644
--- a/arch/arm/mach-spear13xx/platsmp.c
+++ b/arch/arm/mach-spear13xx/platsmp.c
@@ -21,11 +21,6 @@
#include <mach/spear.h>
#include <mach/generic.h>
-/*
- * control for which core is the next to come out of the secondary
- * boot "holding pen"
- */
-volatile int __cpuinitdata pen_release = -1;
static DEFINE_SPINLOCK(boot_lock);
static void __iomem *scu_base = IOMEM(VA_SCU_BASE);
diff --git a/arch/arm/mach-ux500/hotplug.c b/arch/arm/mach-ux500/hotplug.c
index b8e4d9ed62d8..2f6af259015d 100644
--- a/arch/arm/mach-ux500/hotplug.c
+++ b/arch/arm/mach-ux500/hotplug.c
@@ -17,8 +17,6 @@
#include <mach/setup.h>
-extern volatile int pen_release;
-
/*
* platform-specific code to shutdown a CPU
*
diff --git a/arch/arm/mach-ux500/platsmp.c b/arch/arm/mach-ux500/platsmp.c
index b6f4e0e787ec..d60873ee38bf 100644
--- a/arch/arm/mach-ux500/platsmp.c
+++ b/arch/arm/mach-ux500/platsmp.c
@@ -28,12 +28,6 @@
extern void u8500_secondary_startup(void);
/*
- * control for which core is the next to come out of the secondary
- * boot "holding pen"
- */
-volatile int pen_release = -1;
-
-/*
* Write pen_release in a way that is guaranteed to be visible to all
* observers, irrespective of whether they're taking part in coherency
* or not. This is necessary for the hotplug code to work reliably.
diff --git a/arch/arm/mach-vexpress/hotplug.c b/arch/arm/mach-vexpress/hotplug.c
index 734423a39e7c..a141b98d84fe 100644
--- a/arch/arm/mach-vexpress/hotplug.c
+++ b/arch/arm/mach-vexpress/hotplug.c
@@ -16,8 +16,6 @@
#include <asm/smp_plat.h>
#include <asm/cp15.h>
-extern volatile int pen_release;
-
static inline void cpu_enter_lowpower(void)
{
unsigned int v;
diff --git a/arch/arm/plat-versatile/platsmp.c b/arch/arm/plat-versatile/platsmp.c
index 39e60ac4fe65..04ca4937d8ca 100644
--- a/arch/arm/plat-versatile/platsmp.c
+++ b/arch/arm/plat-versatile/platsmp.c
@@ -20,12 +20,6 @@
#include <asm/hardware/gic.h>
/*
- * control for which core is the next to come out of the secondary
- * boot "holding pen"
- */
-volatile int __cpuinitdata pen_release = -1;
-
-/*
* Write pen_release in a way that is guaranteed to be visible to all
* observers, irrespective of whether they're taking part in coherency
* or not. This is necessary for the hotplug code to work reliably.