microcode: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode.c
index 69729e38b78a2d83e7f7e799bd2ea37730305d18..9f0a994eef9b1f0ba209cc1b3c4cd62e492d3097 100644 (file)
--- a/arch/x86/kernel/microcode.c
+++ b/arch/x86/kernel/microcode.c
@@ -75,6 +75,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/cpumask.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -422,6 +423,7 @@ out:
 
 static int microcode_open (struct inode *unused1, struct file *unused2)
 {
+       cycle_kernel_lock();
        return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
 }