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SubjectRe: [PATCH 6/6] vt: push the tty_lock down into the map handling
On Fri, Mar 02, 2012 at 03:00:14PM +0000, Alan Cox wrote:
> From: Alan Cox <>
> When we do this it becomes clear the lock we should be holding is the vc
> lock, and in fact many of our other helpers are properly invoked this way.
> We don't at this point guarantee not to race the keyboard code but the results
> of that appear harmless and that was true before we started as well.
> We now have no users of tty_lock in the console driver...
> Signed-off-by: Alan Cox <>
> ---
> drivers/tty/vt/consolemap.c | 119 ++++++++++++++++++++++++++++++++-----------
> drivers/tty/vt/vt_ioctl.c | 25 ++-------
> include/linux/vt_kern.h | 1
> 3 files changed, 93 insertions(+), 52 deletions(-)

With this patch applied, I get the following build error:

drivers/tty/vt/consolemap.c: In function ‘con_set_trans_old’:
drivers/tty/vt/consolemap.c:315:2: error: implicit declaration of function ‘console_lock’ [-Werror=implicit-function-declaration]
drivers/tty/vt/consolemap.c:323:2: error: implicit declaration of function ‘console_unlock’ [-Werror=implicit-function-declaration]

what went wrong?

I've applied the first 5 in this series to my tree now, but not this


greg k-h
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