diff options
| author |   Ingo Molnar <mingo@elte.hu> | 2006-12-13 00:34:36 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-13 09:05:50 -0800 |
| commit | 5d6f647fc6bb57377c9f417c4752e43189f56bb1 (patch) | |
| tree | ab30c24c021adc549aab6bf042108d920975d9a9 /drivers/char/viocons.c | |
| parent | [PATCH] optimize o_direct on block devices (diff) | |
| download | linux-dev-5d6f647fc6bb57377c9f417c4752e43189f56bb1.tar.xz linux-dev-5d6f647fc6bb57377c9f417c4752e43189f56bb1.zip | |
[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.c | 10 |
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 |