diff --git a/[refs] b/[refs]
index f4948d896bfc..267ffc5c0a00 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 899b69d079713d0f568fb2700b86987aa94f29b2
+refs/heads/master: 4acbab84688bfea82322c14e809fc7d82242cee3
diff --git a/trunk/arch/i386/kernel/cpu/mtrr/main.c b/trunk/arch/i386/kernel/cpu/mtrr/main.c
index 1cf466df330a..7202b98aac4f 100644
--- a/trunk/arch/i386/kernel/cpu/mtrr/main.c
+++ b/trunk/arch/i386/kernel/cpu/mtrr/main.c
@@ -734,10 +734,13 @@ void mtrr_ap_init(void)
  */
 void mtrr_save_state(void)
 {
-	if (smp_processor_id() == 0)
+	int cpu = get_cpu();
+
+	if (cpu == 0)
 		mtrr_save_fixed_ranges(NULL);
 	else
 		smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1, 1);
+	put_cpu();
 }
 
 static int __init mtrr_init_finialize(void)
diff --git a/trunk/drivers/spi/spi.c b/trunk/drivers/spi/spi.c
index c3219b29b5ac..4831edbae2d5 100644
--- a/trunk/drivers/spi/spi.c
+++ b/trunk/drivers/spi/spi.c
@@ -411,7 +411,7 @@ EXPORT_SYMBOL_GPL(spi_alloc_master);
  */
 int spi_register_master(struct spi_master *master)
 {
-	static atomic_t		dyn_bus_id = ATOMIC_INIT((1<<16) - 1);
+	static atomic_t		dyn_bus_id = ATOMIC_INIT((1<<15) - 1);
 	struct device		*dev = master->cdev.dev;
 	int			status = -ENODEV;
 	int			dynamic = 0;
diff --git a/trunk/fs/ioctl.c b/trunk/fs/ioctl.c
index 479c1038ed4a..8c90cbc903fa 100644
--- a/trunk/fs/ioctl.c
+++ b/trunk/fs/ioctl.c
@@ -12,6 +12,7 @@
 #include <linux/fs.h>
 #include <linux/security.h>
 #include <linux/module.h>
+#include <linux/kallsyms.h>
 
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>
@@ -20,6 +21,7 @@ static long do_ioctl(struct file *filp, unsigned int cmd,
 		unsigned long arg)
 {
 	int error = -ENOTTY;
+	void *f;
 
 	if (!filp->f_op)
 		goto out;
@@ -29,10 +31,16 @@ static long do_ioctl(struct file *filp, unsigned int cmd,
 		if (error == -ENOIOCTLCMD)
 			error = -EINVAL;
 		goto out;
-	} else if (filp->f_op->ioctl) {
+	} else if ((f = filp->f_op->ioctl)) {
 		lock_kernel();
-		error = filp->f_op->ioctl(filp->f_path.dentry->d_inode,
-					  filp, cmd, arg);
+		if (!filp->f_op->ioctl) {
+			printk("%s: ioctl %p disappeared\n", __FUNCTION__, f);
+			print_symbol("symbol: %s\n", (unsigned long)f);
+			dump_stack();
+		} else {
+			error = filp->f_op->ioctl(filp->f_path.dentry->d_inode,
+						  filp, cmd, arg);
+		}
 		unlock_kernel();
 	}