xfs: compat_ioctl: use compat_ptr()
For 31-bit s390 user space, we have to pass pointer arguments through compat_ptr() in the compat_ioctl handler. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NEric Sandeen <sandeen@redhat.com> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com> Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
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