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authorArnd Bergmann <arnd@arndb.de>2008-05-20 19:17:02 +0200
committerJonathan Corbet <corbet@lwn.net>2008-07-02 15:06:26 -0600
commit38c4c97c62a30aef276663c1128a2051a25ead7d (patch)
treedf839c451aae68b43e280aa2c894206cd1e50d02 /arch/x86/kernel/cpu
parent3e0420f066c632e135939ccf218ae793e02dccd7 (diff)
x86-mce: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/x86/kernel/cpu')
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_64.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index e07e8c068ae..4ef151633e8 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -9,6 +9,7 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
+#include <linux/smp_lock.h>
#include <linux/string.h>
#include <linux/rcupdate.h>
#include <linux/kallsyms.h>
@@ -527,10 +528,12 @@ static int open_exclu; /* already open exclusive? */
static int mce_open(struct inode *inode, struct file *file)
{
+ lock_kernel();
spin_lock(&mce_state_lock);
if (open_exclu || (open_count && (file->f_flags & O_EXCL))) {
spin_unlock(&mce_state_lock);
+ unlock_kernel();
return -EBUSY;
}
@@ -539,6 +542,7 @@ static int mce_open(struct inode *inode, struct file *file)
open_count++;
spin_unlock(&mce_state_lock);
+ unlock_kernel();
return nonseekable_open(inode, file);
}