sony-laptop: Kill the BKL

Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/platform/x86/sony-laptop.c

@@ -46,7 +46,6 @@
 #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>
@@ -2180,10 +2179,15 @@ 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();
+	unsigned long flags;
+
+	spin_lock_irqsave(sonypi_compat.fifo->lock, flags);
+
 	if (atomic_inc_return(&sonypi_compat.open_count) == 1)
-		kfifo_reset(sonypi_compat.fifo);
-	unlock_kernel();
+		__kfifo_reset(sonypi_compat.fifo);
+
+	spin_unlock_irqrestore(sonypi_compat.fifo->lock, flags);
+
 	return 0;
 }