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Date: Mon, 8 Apr 2013 13:08:08 -0700
From: tip-bot for Thomas Gleixner <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
rusty@...tcorp.com.au, torvalds@...ux-foundation.org,
peterz@...radead.org, srivatsa.bhat@...ux.vnet.ibm.com,
paulmck@...ux.vnet.ibm.com, tglx@...utronix.de,
magnus.damm@...il.com
Subject: [tip:smp/hotplug] arch: Cleanup enable/disable_hlt
Commit-ID: 6546327ad187238ac63d2429701b32becb096fd8
Gitweb: http://git.kernel.org/tip/6546327ad187238ac63d2429701b32becb096fd8
Author: Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Thu, 21 Mar 2013 22:49:31 +0100
Committer: Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 8 Apr 2013 17:39:22 +0200
arch: Cleanup enable/disable_hlt
enable/disable_hlt() does not need to be exported and can be killed on
architectures which do not use it at all.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: Paul McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@...il.com>
Link: http://lkml.kernel.org/r/20130321215233.377959540@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/arm/kernel/process.c | 4 ----
arch/cris/arch-v32/kernel/process.c | 8 +++-----
arch/cris/include/asm/processor.h | 7 -------
arch/cris/kernel/process.c | 25 -------------------------
arch/microblaze/include/asm/processor.h | 2 --
arch/microblaze/kernel/process.c | 12 ------------
arch/mn10300/kernel/smp.c | 5 -----
7 files changed, 3 insertions(+), 60 deletions(-)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 047d3e4..92884c8 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -64,16 +64,12 @@ void disable_hlt(void)
hlt_counter++;
}
-EXPORT_SYMBOL(disable_hlt);
-
void enable_hlt(void)
{
hlt_counter--;
BUG_ON(hlt_counter < 0);
}
-EXPORT_SYMBOL(enable_hlt);
-
static int __init nohlt_setup(char *__unused)
{
hlt_counter = 1;
diff --git a/arch/cris/arch-v32/kernel/process.c b/arch/cris/arch-v32/kernel/process.c
index 2b23ef0..4857933 100644
--- a/arch/cris/arch-v32/kernel/process.c
+++ b/arch/cris/arch-v32/kernel/process.c
@@ -20,16 +20,14 @@
extern void stop_watchdog(void);
-extern int cris_hlt_counter;
-
/* We use this if we don't have any better idle routine. */
void default_idle(void)
{
local_irq_disable();
- if (!need_resched() && !cris_hlt_counter) {
- /* Halt until exception. */
+ if (!need_resched()) {
+ /* Halt until exception. */
__asm__ volatile("ei \n\t"
- "halt ");
+ "halt ");
}
local_irq_enable();
}
diff --git a/arch/cris/include/asm/processor.h b/arch/cris/include/asm/processor.h
index 675823f..c0a29b9 100644
--- a/arch/cris/include/asm/processor.h
+++ b/arch/cris/include/asm/processor.h
@@ -65,13 +65,6 @@ static inline void release_thread(struct task_struct *dead_task)
#define cpu_relax() barrier()
-/*
- * disable hlt during certain critical i/o operations
- */
-#define HAVE_DISABLE_HLT
-void disable_hlt(void);
-void enable_hlt(void);
-
void default_idle(void);
#endif /* __ASM_CRIS_PROCESSOR_H */
diff --git a/arch/cris/kernel/process.c b/arch/cris/kernel/process.c
index 104ff4d..508c9cd 100644
--- a/arch/cris/kernel/process.c
+++ b/arch/cris/kernel/process.c
@@ -29,31 +29,6 @@
//#define DEBUG
-/*
- * The hlt_counter, disable_hlt and enable_hlt is just here as a hook if
- * there would ever be a halt sequence (for power save when idle) with
- * some largish delay when halting or resuming *and* a driver that can't
- * afford that delay. The hlt_counter would then be checked before
- * executing the halt sequence, and the driver marks the unhaltable
- * region by enable_hlt/disable_hlt.
- */
-
-int cris_hlt_counter=0;
-
-void disable_hlt(void)
-{
- cris_hlt_counter++;
-}
-
-EXPORT_SYMBOL(disable_hlt);
-
-void enable_hlt(void)
-{
- cris_hlt_counter--;
-}
-
-EXPORT_SYMBOL(enable_hlt);
-
extern void default_idle(void);
void (*pm_power_off)(void);
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 0759153..f576fe0 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -160,8 +160,6 @@ unsigned long get_wchan(struct task_struct *p);
# define STACK_TOP TASK_SIZE
# define STACK_TOP_MAX STACK_TOP
-void disable_hlt(void);
-void enable_hlt(void);
void default_idle(void);
#ifdef CONFIG_DEBUG_FS
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index fa0ea60..7c36171 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -46,18 +46,6 @@ EXPORT_SYMBOL(pm_power_off);
static int hlt_counter = 1;
-void disable_hlt(void)
-{
- hlt_counter++;
-}
-EXPORT_SYMBOL(disable_hlt);
-
-void enable_hlt(void)
-{
- hlt_counter--;
-}
-EXPORT_SYMBOL(enable_hlt);
-
static int __init nohlt_setup(char *__unused)
{
hlt_counter = 1;
diff --git a/arch/mn10300/kernel/smp.c b/arch/mn10300/kernel/smp.c
index 5d7e152..eaef5ad 100644
--- a/arch/mn10300/kernel/smp.c
+++ b/arch/mn10300/kernel/smp.c
@@ -935,8 +935,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
int timeout;
#ifdef CONFIG_HOTPLUG_CPU
- if (num_online_cpus() == 1)
- disable_hlt();
if (sleep_mode[cpu])
run_wakeup_cpu(cpu);
#endif /* CONFIG_HOTPLUG_CPU */
@@ -1003,9 +1001,6 @@ int __cpu_disable(void)
void __cpu_die(unsigned int cpu)
{
run_sleep_cpu(cpu);
-
- if (num_online_cpus() == 1)
- enable_hlt();
}
#ifdef CONFIG_MN10300_CACHE_ENABLED
--
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