On Friday 01 July 2011, Johannes Stezenbach wrote:
On Linux x86_64 host with 32bit userspace, running
qemu or even just qemu-img create -f qcow2 some.img 1G
causes a kernel warning:
ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(5326){t:'S';sz:0}
arg(7fff) on some.img
ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(801c0204){t:02;sz:28}
arg(fff77350) on some.img
ioctl 5326 is CDROM_DRIVE_STATUS,
ioctl 801c0204 is FDGETPRM.
The warning appears because the Linux compat-ioctl handler for these
ioctls only applies to block devices, while qemu also uses the ioctls on
plain files.
Signed-off-by: Johannes Stezenbach j...@sig21.net
Acked-by: Arnd Bergmann a...@arndb.de
---
(resend with Cc: suggested by get_maintainer.pl)
discussed in http://lkml.kernel.org/r/20110617090424.ga19...@sig21.net
Arnd, is this what you had in mind, or did you mean to move
all floppy compat definitions? I decided to go with the
minimal change. Tested on both 2.6.39.2 and 3.0-rc5-63-g0d72c6f.
Yes, that should be fine, unless Jens would like to see a different
solution for the struct definitions, e.g. moving all of the floppy
compat ioctl numbers to fd.h. I'm fine with it either way.
Arnd
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