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authorIngo Molnar <mingo@elte.hu>2006-12-13 00:34:36 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-13 09:05:50 -0800
commit5d6f647fc6bb57377c9f417c4752e43189f56bb1 (patch)
treeab30c24c021adc549aab6bf042108d920975d9a9 /drivers/char/viocons.c
parente61c90188b9956edae1105eef361d8981a352fcd (diff)
[PATCH] debug: add sysrq_always_enabled boot option
Most distributions enable sysrq support but set it to 0 by default. Add a sysrq_always_enabled boot option to always-enable sysrq keys. Useful for debugging - without having to modify the disribution's config files (which might not be possible if the kernel is on a live CD, etc.). Also, while at it, clean up the sysrq interfaces. [bunk@stusta.de: make sysrq_always_enabled_setup() static] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/viocons.c')
-rw-r--r--drivers/char/viocons.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/char/viocons.c b/drivers/char/viocons.c
index 6d2e314860df..0e0da443cbd5 100644
--- a/drivers/char/viocons.c
+++ b/drivers/char/viocons.c
@@ -61,10 +61,7 @@
static DEFINE_SPINLOCK(consolelock);
static DEFINE_SPINLOCK(consoleloglock);
-#ifdef CONFIG_MAGIC_SYSRQ
static int vio_sysrq_pressed;
-extern int sysrq_enabled;
-#endif
#define VIOCHAR_NUM_BUF 16
@@ -936,8 +933,10 @@ static void vioHandleData(struct HvLpEvent *event)
*/
num_pushed = 0;
for (index = 0; index < cevent->len; index++) {
-#ifdef CONFIG_MAGIC_SYSRQ
- if (sysrq_enabled) {
+ /*
+ * Will be optimized away if !CONFIG_MAGIC_SYSRQ:
+ */
+ if (sysrq_on()) {
/* 0x0f is the ascii character for ^O */
if (cevent->data[index] == '\x0f') {
vio_sysrq_pressed = 1;
@@ -956,7 +955,6 @@ static void vioHandleData(struct HvLpEvent *event)
continue;
}
}
-#endif
/*
* The sysrq sequence isn't included in this check if
* sysrq is enabled and compiled into the kernel because