From 589dc7e54bc1110abc6e0b35fc385cd823432ef9 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 20 May 2008 19:16:26 +0200
Subject: [PATCH] --- yaml --- r: 100369 b: refs/heads/master c:
 930ab4e532623795f934467c452a8c71be2c30fe h: refs/heads/master i:   100367:
 f0b274da8fc9769a65efe0effa49f8db0c7fdd9e v: v3

---
 [refs]                     | 2 +-
 trunk/drivers/char/nvram.c | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 3f787f0028e0..834b78210c9e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fd3e05b6c82ebee06f888482975172028e89382d
+refs/heads/master: 930ab4e532623795f934467c452a8c71be2c30fe
diff --git a/trunk/drivers/char/nvram.c b/trunk/drivers/char/nvram.c
index 98dec380af49..197cd7a0c332 100644
--- a/trunk/drivers/char/nvram.c
+++ b/trunk/drivers/char/nvram.c
@@ -107,6 +107,7 @@
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -333,12 +334,14 @@ nvram_ioctl(struct inode *inode, struct file *file,
 static int
 nvram_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	spin_lock(&nvram_state_lock);
 
 	if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
 	    (nvram_open_mode & NVRAM_EXCL) ||
 	    ((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE))) {
 		spin_unlock(&nvram_state_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 
@@ -349,6 +352,7 @@ nvram_open(struct inode *inode, struct file *file)
 	nvram_open_cnt++;
 
 	spin_unlock(&nvram_state_lock);
+	unlock_kernel();
 
 	return 0;
 }