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With certain version of gcc lov_obd.c failes to compile with the following warning. In function copy_to_user, inlined from lov_iocontrol at lustre/lustre/lov/lov_obd.c:1168: ./arch/x86/include/asm/uaccess.h:735: error: call to __copy_to_user_overflow declared with attribute warning: copy_to_user() buffer size is not probably correct In lov_iocontrol the data was being casted to int instead of the required unsigned long. This patch changes the cast to what is needed for copy_to_user. Signed-off-by: James Simmons <uja.ornl@yahoo.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6302 Reviewed-on: http://review.whamcloud.com/14613 Reviewed-by: frank zago <fzago@cray.com> Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com> Reviewed-by: John L. Hammond <john.hammond@intel.com> Reviewed-by: Oleg Drokin <oleg.drokin@intel.com> Signed-off-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>