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authorLen Brown <len.brown@intel.com>2011-04-01 19:34:59 -0400
committerLen Brown <len.brown@intel.com>2011-08-03 19:06:37 -0400
commita0bfa1373859e9d11dc92561a8667588803e42d8 (patch)
treeef5768a313ac16a211830efc3edb9ca95487cb6a /arch
parent4bfc8288bc4a64529c5547d17349a2a1f4675507 (diff)
downloadlinux-a0bfa1373859e9d11dc92561a8667588803e42d8.tar.bz2
cpuidle: stop depending on pm_idle
cpuidle users should call cpuidle_call_idle() directly rather than via (pm_idle)() function pointer. Architecture may choose to continue using (pm_idle)(), but cpuidle need not depend on it: my_arch_cpu_idle() ... if(cpuidle_call_idle()) pm_idle(); cc: Kevin Hilman <khilman@deeprootsystems.com> cc: Paul Mundt <lethal@linux-sh.org> cc: x86@kernel.org Acked-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kernel/process.c4
-rw-r--r--arch/sh/kernel/idle.c6
-rw-r--r--arch/x86/kernel/process_32.c4
-rw-r--r--arch/x86/kernel/process_64.c4
4 files changed, 13 insertions, 5 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 5e1e54197227..d7ee0d4c072d 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -30,6 +30,7 @@
#include <linux/uaccess.h>
#include <linux/random.h>
#include <linux/hw_breakpoint.h>
+#include <linux/cpuidle.h>
#include <asm/cacheflush.h>
#include <asm/leds.h>
@@ -196,7 +197,8 @@ void cpu_idle(void)
cpu_relax();
} else {
stop_critical_timings();
- pm_idle();
+ if (cpuidle_call_idle())
+ pm_idle();
start_critical_timings();
/*
* This will eventually be removed - pm_idle
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 425d604e3a28..9c7099ebfe14 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -16,12 +16,13 @@
#include <linux/thread_info.h>
#include <linux/irqflags.h>
#include <linux/smp.h>
+#include <linux/cpuidle.h>
#include <asm/pgalloc.h>
#include <asm/system.h>
#include <asm/atomic.h>
#include <asm/smp.h>
-void (*pm_idle)(void) = NULL;
+static void (*pm_idle)(void);
static int hlt_counter;
@@ -100,7 +101,8 @@ void cpu_idle(void)
local_irq_disable();
/* Don't trace irqs off for idle */
stop_critical_timings();
- pm_idle();
+ if (cpuidle_call_idle())
+ pm_idle();
/*
* Sanity check to ensure that pm_idle() returns
* with IRQs enabled
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index a3d0dc59067b..7a3b65107a27 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -38,6 +38,7 @@
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/kdebug.h>
+#include <linux/cpuidle.h>
#include <asm/pgtable.h>
#include <asm/system.h>
@@ -109,7 +110,8 @@ void cpu_idle(void)
local_irq_disable();
/* Don't trace irqs off for idle */
stop_critical_timings();
- pm_idle();
+ if (cpuidle_idle_call())
+ pm_idle();
start_critical_timings();
}
tick_nohz_restart_sched_tick();
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index ca6f7ab8df33..f693e44e1bf6 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -37,6 +37,7 @@
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/ftrace.h>
+#include <linux/cpuidle.h>
#include <asm/pgtable.h>
#include <asm/system.h>
@@ -136,7 +137,8 @@ void cpu_idle(void)
enter_idle();
/* Don't trace irqs off for idle */
stop_critical_timings();
- pm_idle();
+ if (cpuidle_idle_call())
+ pm_idle();
start_critical_timings();
/* In many cases the interrupt that ended idle