From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 20 May 2008 17:16:50 +0000 (+0200)
Subject: sparc64-rtc: BKL pushdown
X-Git-Tag: firefly_0821_release~19698^2~25
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=09de36137c3794786bc75682c0e1ce45182c1772;p=firefly-linux-kernel-4.4.55.git

sparc64-rtc: BKL pushdown

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

diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index e5d238970c7e..bedc4c159b1c 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -11,6 +11,7 @@
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/kernel.h>
 #include <linux/param.h>
 #include <linux/string.h>
@@ -1659,10 +1660,14 @@ static int mini_rtc_ioctl(struct inode *inode, struct file *file,
 
 static int mini_rtc_open(struct inode *inode, struct file *file)
 {
-	if (mini_rtc_status & RTC_IS_OPEN)
+	lock_kernel();
+	if (mini_rtc_status & RTC_IS_OPEN) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 
 	mini_rtc_status |= RTC_IS_OPEN;
+	unlock_kernel();
 
 	return 0;
 }