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SubjectAlways print panic message on current console
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The kernel offers with TIOCL_GETKMSGREDIRECT ioctl() the possibility to
redirect the kernel messages to a specific console.

However, since it's not possible to switch to the kernel message console after
a panic(), it would be nice if the kernel would print the panic message on the
current console.

As suggested by Andrew, this patch series adds a new interface to access
the global kmsg_redirect variable by a function to be able to use it in
code where CONFIG_VT_CONSOLE is not set (kernel/panic.c).

The patch series makes kmsg_redirect a static variable and all kernel
code outside of vt.c accesses that variable by the vt_set_kmsg_redirect()
and vt_get_kmsg_redirect() functions.


Signed-off-by: Bernhard Walle <bernhard@bwalle.de>

---
drivers/char/vt.c | 41 ++++++++++++++++++++++++++++++++++++++++-
include/linux/tty.h | 2 --
include/linux/vt.h | 18 ++++++++++++++++++
kernel/panic.c | 4 ++++
kernel/power/console.c | 8 ++++----
5 files changed, 66 insertions(+), 7 deletions(-)



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