Re: [PATCH] compat_ioctl: Supress "unknown cmd" message on serial /dev/console

From: Arnd Bergmann
Date: Sat Jan 16 2010 - 03:03:23 EST

On Sunday 10 January 2010, Atsushi Nemoto wrote:
> After the commit fb07a5f8 ("compat_ioctl: remove all VT ioctl
> handling"), I got this error message on 64-bit mips kernel with 32-bit
> busybox userland:
> ioctl32(init:1): Unknown cmd fd(0) cmd(00005600){t:'V';sz:0} arg(7fd76480) on /dev/console
> The cmd 5600 is VT_OPENQRY. The busybox's init issues this ioctl to
> know vt-console or serial-console. If the console was serial console,
> VT ioctls are not handled by the serial driver.
> And by quick search, I found some programs using VT_GETMODE to check
> vt-console is available or not.
> Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>

Acked-by: Arnd Bergmann <arnd@xxxxxxxx>

Thanks for adding it to your tree, Greg. I'm a bit slow on
email currently, as I'm travelling.

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