]> git.karo-electronics.de Git - linux-beck.git/commit
compat_ioctl: fix warning caused by qemu
authorJohannes Stezenbach <js@sig21.net>
Fri, 1 Jul 2011 20:32:26 +0000 (22:32 +0200)
committerJens Axboe <jaxboe@fusionio.com>
Fri, 1 Jul 2011 20:32:26 +0000 (22:32 +0200)
commit390192b300570b2bc721d77067ca133f58015ae8
treebacbd75f23e74308b814146338bcaa6b3636bae7
parent85ef06d1d252f6a2e73b678591ab71caad4667bb
compat_ioctl: fix warning caused by qemu

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(00005326){t:'S';sz:0} arg(7fffffff) on some.img
ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(801c0204){t:02;sz:28} arg(fff77350) on some.img

ioctl 00005326 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 <js@sig21.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
block/compat_ioctl.c
fs/compat_ioctl.c
include/linux/fd.h