path: root/block
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authorJohannes Stezenbach <>2011-07-01 22:32:26 +0200
committerJens Axboe <>2011-07-01 22:32:26 +0200
commit390192b300570b2bc721d77067ca133f58015ae8 (patch)
treebacbd75f23e74308b814146338bcaa6b3636bae7 /block
parent85ef06d1d252f6a2e73b678591ab71caad4667bb (diff)
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 <> Acked-by: Arnd Bergmann <> Signed-off-by: Jens Axboe <>
Diffstat (limited to 'block')
1 files changed, 0 insertions, 14 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index cc3eb78e333a..7b725020823c 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -208,19 +208,6 @@ static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode,
#define BLKBSZSET_32 _IOW(0x12, 113, int)
#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
-struct compat_floppy_struct {
- compat_uint_t size;
- compat_uint_t sect;
- compat_uint_t head;
- compat_uint_t track;
- compat_uint_t stretch;
- unsigned char gap;
- unsigned char rate;
- unsigned char spec1;
- unsigned char fmt_gap;
- const compat_caddr_t name;
struct compat_floppy_drive_params {
char cmos;
compat_ulong_t max_dtr;
@@ -288,7 +275,6 @@ struct compat_floppy_write_errors {
#define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
#define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
-#define FDGETPRM32 _IOR(2, 0x04, struct compat_floppy_struct)
#define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params)
#define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params)
#define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct)