[1/1] Input: sysrq -- ensure sysrq_enabled and __sysrq_enabled are consistent

Commit Message

Andy Whitcroft Jan. 15, 2011, 8:23 p.m. UTC

None

Patch

diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index c556ed9..ba8cf87 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -46,7 +46,7 @@ 
 #include <asm/irq_regs.h>
 
 /* Whether we react on sysrq keys or just ignore them */
-static int __read_mostly sysrq_enabled = 1;
+static int __read_mostly sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT;
 static bool __read_mostly sysrq_always_enabled;
 
 static bool sysrq_on(void)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index bc86bb3..85fd935 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -170,7 +170,8 @@  static int proc_taint(struct ctl_table *table, int write,
 #endif
 
 #ifdef CONFIG_MAGIC_SYSRQ
-static int __sysrq_enabled; /* Note: sysrq code ises it's own private copy */
+/* Note: sysrq code uses it's own private copy */
+static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT;
 
 static int sysrq_sysctl_handler(ctl_table *table, int write,
 				void __user *buffer, size_t *lenp,
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 2d05adb..459105e 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -50,6 +50,15 @@  config MAGIC_SYSRQ
 	  keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
 	  unless you really know what this hack does.
 
+config MAGIC_SYSRQ_DEFAULT
+	int "Magic SysRq key default"
+	default 1
+        range 0 1
+	help
+	  Set the default value for the sysrq sysfs control to this value.
+	  Setting this to 1 will enable sysrq on boot, to 0 will disable
+	  sysrq on boot.
+
 config STRIP_ASM_SYMS
 	bool "Strip assembler-generated symbols during link"
 	default n