From 4541b5ec9f631a143cdea862d07ddfc3cdac36f2 Mon Sep 17 00:00:00 2001
From: Jonathan Corbet <corbet@lwn.net>
Date: Fri, 16 May 2008 14:03:05 -0600
Subject: phantom: BKL pushdown

Add explicit lock_kernel calls to phantom_open().

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 drivers/misc/phantom.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'drivers/misc')

diff --git a/drivers/misc/phantom.c b/drivers/misc/phantom.c
index 71d1c84e2fa8..186162470090 100644
--- a/drivers/misc/phantom.c
+++ b/drivers/misc/phantom.c
@@ -22,6 +22,7 @@
 #include <linux/interrupt.h>
 #include <linux/cdev.h>
 #include <linux/phantom.h>
+#include <linux/smp_lock.h>
 
 #include <asm/atomic.h>
 #include <asm/io.h>
@@ -212,13 +213,17 @@ static int phantom_open(struct inode *inode, struct file *file)
 	struct phantom_device *dev = container_of(inode->i_cdev,
 			struct phantom_device, cdev);
 
+	lock_kernel();
 	nonseekable_open(inode, file);
 
-	if (mutex_lock_interruptible(&dev->open_lock))
+	if (mutex_lock_interruptible(&dev->open_lock)) {
+		unlock_kernel();
 		return -ERESTARTSYS;
+	}
 
 	if (dev->opened) {
 		mutex_unlock(&dev->open_lock);
+		unlock_kernel();
 		return -EINVAL;
 	}
 
@@ -229,7 +234,7 @@ static int phantom_open(struct inode *inode, struct file *file)
 	atomic_set(&dev->counter, 0);
 	dev->opened++;
 	mutex_unlock(&dev->open_lock);
-
+	unlock_kernel();
 	return 0;
 }
 
-- 
cgit v1.2.3


From 4a7e79a7deab9718d51dc8d3ee938bd0eb789b7b Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 20 May 2008 19:15:57 +0200
Subject: hdpu_cpustate: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/misc/hdpuftrs/hdpu_cpustate.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'drivers/misc')

diff --git a/drivers/misc/hdpuftrs/hdpu_cpustate.c b/drivers/misc/hdpuftrs/hdpu_cpustate.c
index ff51ab67231c..176fe4e09d3f 100644
--- a/drivers/misc/hdpuftrs/hdpu_cpustate.c
+++ b/drivers/misc/hdpuftrs/hdpu_cpustate.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <linux/miscdevice.h>
 #include <linux/proc_fs.h>
 #include <linux/hdpu_features.h>
@@ -151,7 +152,13 @@ static ssize_t cpustate_write(struct file *file, const char *buf,
 
 static int cpustate_open(struct inode *inode, struct file *file)
 {
-	return cpustate_get_ref((file->f_flags & O_EXCL));
+	int ret;
+
+	lock_kernel();
+	ret = cpustate_get_ref((file->f_flags & O_EXCL));
+	unlock_kernel();
+
+	return ret;
 }
 
 static int cpustate_release(struct inode *inode, struct file *file)
-- 
cgit v1.2.3


From 0410e689b19b6ca010a6a44abfa820968ae15733 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 20 May 2008 19:16:45 +0200
Subject: sony-laptop: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/misc/sony-laptop.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/misc')

diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 00e48e2a9c11..60775be22822 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -46,6 +46,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/backlight.h>
 #include <linux/platform_device.h>
@@ -1927,8 +1928,10 @@ static int sonypi_misc_release(struct inode *inode, struct file *file)
 static int sonypi_misc_open(struct inode *inode, struct file *file)
 {
 	/* Flush input queue on first open */
+	lock_kernel();
 	if (atomic_inc_return(&sonypi_compat.open_count) == 1)
 		kfifo_reset(sonypi_compat.fifo);
+	unlock_kernel();
 	return 0;
 }
 
-- 
cgit v1.2.3