1 files changed, 60 insertions, 0 deletions

diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
new file mode 100644
index 000000000000..ea819b89c235
--- /dev/null
+++ b/include/linux/sysrq.h
@@ -0,0 +1,60 @@
+/* -*- 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
+ */
+
+#include <linux/config.h>
+
+struct pt_regs;
+struct tty_struct;
+
+/* 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, struct pt_regs *, struct tty_struct *);
+        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, struct pt_regs *, struct tty_struct *);
+void __handle_sysrq(int, struct pt_regs *, struct tty_struct *, int check_mask);
+int register_sysrq_key(int, struct sysrq_key_op *);
+int unregister_sysrq_key(int, struct sysrq_key_op *);
+struct sysrq_key_op *__sysrq_get_key_op(int key);
+
+#else
+
+static inline int __reterr(void)
+{
+        return -EINVAL;
+}
+
+#define register_sysrq_key(ig,nore) __reterr()
+#define unregister_sysrq_key(ig,nore) __reterr()
+
+#endif