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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>
This commit is contained in:
Daniel Walker 2008-01-30 13:31:17 +01:00 committed by Ingo Molnar
parent fa20efd2fc
commit 8c8b8859b6
1 changed files with 4 additions and 4 deletions
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8
arch/x86/kernel/cpu/mcheck/mce_64.c
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@ -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;
}