From 7c31a0c3a60724ba4415f5559c6424faf2e035c7 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Mon, 21 Feb 2011 14:32:23 -0800
Subject: [PATCH] compat: backport tty_{lock,unlock,locked}

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 include/linux/compat-2.6.36.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/linux/compat-2.6.36.h b/include/linux/compat-2.6.36.h
index 74d2309d441a..0e3b77470ec6 100644
--- a/include/linux/compat-2.6.36.h
+++ b/include/linux/compat-2.6.36.h
@@ -9,6 +9,7 @@
 #include <pcmcia/cistpl.h>
 #include <pcmcia/ds.h>
 #include <linux/pm_qos_params.h>
+#include <linux/smp_lock.h>
 
 #define kparam_block_sysfs_write(a)
 #define kparam_unblock_sysfs_write(a)
@@ -101,6 +102,23 @@ int no_printk(const char *s, ...) { return 0; }
 #define alloc_workqueue(name, flags, max_active) __create_workqueue(name, flags, max_active, 0)
 #endif
 
+#define EXTPROC	0200000
+#define TIOCPKT_IOCTL		64
+
+static inline void tty_lock(void) __acquires(kernel_lock)
+{
+#ifdef CONFIG_LOCK_KERNEL
+	/* kernel_locked is 1 for !CONFIG_LOCK_KERNEL */
+	WARN_ON(kernel_locked());
+#endif
+	lock_kernel();
+}
+static inline void tty_unlock(void) __releases(kernel_lock)
+{
+	unlock_kernel();
+}
+#define tty_locked()           (kernel_locked())
+
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)) */
 
 #endif /* LINUX_26_36_COMPAT_H */
-- 
2.30.2