Initial import

1 files changed, 75 insertions, 0 deletions

diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
new file mode 100644
index 000000000..387fa7d05
--- /dev/null
+++ b/include/linux/sysrq.h
@@ -0,0 +1,75 @@
+/* -*- linux-c -*-
+ *
+ *	$Id: sysrq.h,v 1.3 1997/07/17 11:54:33 mj Exp $
+ *
+ *	Linux Magic System Request Key Hacks
+ *
+ *	(c) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ *
+ *	(c) 2000 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
+ *	overhauled to use key registration
+ *	based upon discusions in irc://irc.openprojects.net/#kernelnewbies
+ */
+
+#ifndef _LINUX_SYSRQ_H
+#define _LINUX_SYSRQ_H
+
+#include <linux/errno.h>
+#include <linux/types.h>
+
+/* Possible values of bitmask for enabling sysrq functions */
+/* 0x0001 is reserved for enable everything */
+#define SYSRQ_ENABLE_LOG	0x0002
+#define SYSRQ_ENABLE_KEYBOARD	0x0004
+#define SYSRQ_ENABLE_DUMP	0x0008
+#define SYSRQ_ENABLE_SYNC	0x0010
+#define SYSRQ_ENABLE_REMOUNT	0x0020
+#define SYSRQ_ENABLE_SIGNAL	0x0040
+#define SYSRQ_ENABLE_BOOT	0x0080
+#define SYSRQ_ENABLE_RTNICE	0x0100
+
+struct sysrq_key_op {
+	void (*handler)(int);
+	char *help_msg;
+	char *action_msg;
+	int enable_mask;
+};
+
+#ifdef CONFIG_MAGIC_SYSRQ
+
+/* Generic SysRq interface -- you may call it from any device driver, supplying
+ * ASCII code of the key, pointer to registers and kbd/tty structs (if they
+ * are available -- else NULL's).
+ */
+
+void handle_sysrq(int key);
+void __handle_sysrq(int key, bool check_mask);
+int register_sysrq_key(int key, struct sysrq_key_op *op);
+int unregister_sysrq_key(int key, struct sysrq_key_op *op);
+struct sysrq_key_op *__sysrq_get_key_op(int key);
+
+int sysrq_toggle_support(int enable_mask);
+
+#else
+
+static inline void handle_sysrq(int key)
+{
+}
+
+static inline void __handle_sysrq(int key, bool check_mask)
+{
+}
+
+static inline int register_sysrq_key(int key, struct sysrq_key_op *op)
+{
+	return -EINVAL;
+}
+
+static inline int unregister_sysrq_key(int key, struct sysrq_key_op *op)
+{
+	return -EINVAL;
+}
+
+#endif
+
+#endif /* _LINUX_SYSRQ_H */