From 8292c9e15c3b069459794a04f5e2cf0d5665ddc4 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 24 Feb 2010 09:50:22 +0100
Subject: locking, semaphores: Annotate inner lock as raw

There is no reason to have the spin_lock protecting the semaphore
preemptible on -rt. Annotate it as a raw_spinlock.

In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.

( On rt this also solves lockdep complaining about the
  rt_mutex.wait_lock being not initialized. )

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 kernel/semaphore.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

(limited to 'kernel/semaphore.c')

diff --git a/kernel/semaphore.c b/kernel/semaphore.c
index 94a62c0d4ade..d831841e55a7 100644
--- a/kernel/semaphore.c
+++ b/kernel/semaphore.c
@@ -54,12 +54,12 @@ void down(struct semaphore *sem)
 {
 	unsigned long flags;
 
-	spin_lock_irqsave(&sem->lock, flags);
+	raw_spin_lock_irqsave(&sem->lock, flags);
 	if (likely(sem->count > 0))
 		sem->count--;
 	else
 		__down(sem);
-	spin_unlock_irqrestore(&sem->lock, flags);
+	raw_spin_unlock_irqrestore(&sem->lock, flags);
 }
 EXPORT_SYMBOL(down);
 
@@ -77,12 +77,12 @@ int down_interruptible(struct semaphore *sem)
 	unsigned long flags;
 	int result = 0;
 
-	spin_lock_irqsave(&sem->lock, flags);
+	raw_spin_lock_irqsave(&sem->lock, flags);
 	if (likely(sem->count > 0))
 		sem->count--;
 	else
 		result = __down_interruptible(sem);
-	spin_unlock_irqrestore(&sem->lock, flags);
+	raw_spin_unlock_irqrestore(&sem->lock, flags);
 
 	return result;
 }
@@ -103,12 +103,12 @@ int down_killable(struct semaphore *sem)
 	unsigned long flags;
 	int result = 0;
 
-	spin_lock_irqsave(&sem->lock, flags);
+	raw_spin_lock_irqsave(&sem->lock, flags);
 	if (likely(sem->count > 0))
 		sem->count--;
 	else
 		result = __down_killable(sem);
-	spin_unlock_irqrestore(&sem->lock, flags);
+	raw_spin_unlock_irqrestore(&sem->lock, flags);
 
 	return result;
 }
@@ -132,11 +132,11 @@ int down_trylock(struct semaphore *sem)
 	unsigned long flags;
 	int count;
 
-	spin_lock_irqsave(&sem->lock, flags);
+	raw_spin_lock_irqsave(&sem->lock, flags);
 	count = sem->count - 1;
 	if (likely(count >= 0))
 		sem->count = count;
-	spin_unlock_irqrestore(&sem->lock, flags);
+	raw_spin_unlock_irqrestore(&sem->lock, flags);
 
 	return (count < 0);
 }
@@ -157,12 +157,12 @@ int down_timeout(struct semaphore *sem, long jiffies)
 	unsigned long flags;
 	int result = 0;
 
-	spin_lock_irqsave(&sem->lock, flags);
+	raw_spin_lock_irqsave(&sem->lock, flags);
 	if (likely(sem->count > 0))
 		sem->count--;
 	else
 		result = __down_timeout(sem, jiffies);
-	spin_unlock_irqrestore(&sem->lock, flags);
+	raw_spin_unlock_irqrestore(&sem->lock, flags);
 
 	return result;
 }
@@ -179,12 +179,12 @@ void up(struct semaphore *sem)
 {
 	unsigned long flags;
 
-	spin_lock_irqsave(&sem->lock, flags);
+	raw_spin_lock_irqsave(&sem->lock, flags);
 	if (likely(list_empty(&sem->wait_list)))
 		sem->count++;
 	else
 		__up(sem);
-	spin_unlock_irqrestore(&sem->lock, flags);
+	raw_spin_unlock_irqrestore(&sem->lock, flags);
 }
 EXPORT_SYMBOL(up);
 
@@ -217,9 +217,9 @@ static inline int __sched __down_common(struct semaphore *sem, long state,
 		if (timeout <= 0)
 			goto timed_out;
 		__set_task_state(task, state);
-		spin_unlock_irq(&sem->lock);
+		raw_spin_unlock_irq(&sem->lock);
 		timeout = schedule_timeout(timeout);
-		spin_lock_irq(&sem->lock);
+		raw_spin_lock_irq(&sem->lock);
 		if (waiter.up)
 			return 0;
 	}
-- 
cgit v1.2.2


From 9984de1a5a8a96275fcab818f7419af5a3c86e71 Mon Sep 17 00:00:00 2001
From: Paul Gortmaker <paul.gortmaker@windriver.com>
Date: Mon, 23 May 2011 14:51:41 -0400
Subject: kernel: Map most files to use export.h instead of module.h

The changed files were only including linux/module.h for the
EXPORT_SYMBOL infrastructure, and nothing else.  Revector them
onto the isolated export header for faster compile times.

Nothing to see here but a whole lot of instances of:

  -#include <linux/module.h>
  +#include <linux/export.h>

This commit is only changing the kernel dir; next targets
will probably be mm, fs, the arch dirs, etc.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
 kernel/semaphore.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'kernel/semaphore.c')

diff --git a/kernel/semaphore.c b/kernel/semaphore.c
index d831841e55a7..60636a4e25c3 100644
--- a/kernel/semaphore.c
+++ b/kernel/semaphore.c
@@ -27,7 +27,7 @@
 
 #include <linux/compiler.h>
 #include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/sched.h>
 #include <linux/semaphore.h>
 #include <linux/spinlock.h>
-- 
cgit v1.2.2