On October 26, 2014 6:22:52 AM CET, Li Xi <pkuelelixi@xxxxxxxxx> wrote: > #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) >+#define EXT4_IOC_GETPROJECT _IOR('f', 19, long) >+#define EXT4_IOC_SETPROJECT _IOW('f', 20, long) >+ projid = (__u32)from_kprojid(&init_user_ns, >+ EXT4_I(inode)->i_projid); >+ return put_user(projid, (__u32 __user *) arg); >+ } >+ case EXT4_IOC_SETPROJECT: >+ { >+ __u32 projid; >+ >+ if (get_user(projid, (__u32 __user *) arg)) >+ return -EFAULT; >+ >+ return ext4_ioctl_setproject(filp, Types don't match. Please use __u32 in the command definition instead of long, otherwise 32 bit compact won't work. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html