mcheck mce_64: mce_read_sem to mutex

Converted to a mutex, and changed the name to mce_read_mutex.

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index 0adad772d0da48b96135f6678675c602eabda85a..8cd47fe2ef2c969e5e4a6a0473482dfc81d592ad 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -564,7 +564,7 @@ static ssize_t mce_read(struct file *filp, char __user *ubuf, size_t usize,
                        loff_t *off)
 {
        unsigned long *cpu_tsc;
-       static DECLARE_MUTEX(mce_read_sem);
+       static DEFINE_MUTEX(mce_read_mutex);
        unsigned next;
        char __user *buf = ubuf;
        int i, err;
@@ -573,12 +573,12 @@ static ssize_t mce_read(struct file *filp, char __user *ubuf, size_t usize,
        if (!cpu_tsc)
                return -ENOMEM;
 
-       down(&mce_read_sem);
+       mutex_lock(&mce_read_mutex);
        next = rcu_dereference(mcelog.next);
 
        /* Only supports full reads right now */
        if (*off != 0 || usize < MCE_LOG_LEN*sizeof(struct mce)) {
-               up(&mce_read_sem);
+               mutex_unlock(&mce_read_mutex);
                kfree(cpu_tsc);
                return -EINVAL;
        }
@@ -621,7 +621,7 @@ static ssize_t mce_read(struct file *filp, char __user *ubuf, size_t usize,
                        memset(&mcelog.entry[i], 0, sizeof(struct mce));
                }
        }
-       up(&mce_read_sem);
+       mutex_unlock(&mce_read_mutex);
        kfree(cpu_tsc);
        return err ? -EFAULT : buf - ubuf;
 }