diff options
Diffstat (limited to 'arch/x86/kernel/microcode.c')
| -rw-r--r-- | arch/x86/kernel/microcode.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode.c index 69729e38b78a..9f0a994eef9b 100644 --- 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; } |