[PATCH] xfs: move XFS_IOC_GETVERSION to main multiplexer

[Alexey Dobriyan <adobriyan@xxxxxxxxx>]

* Don't do inode => vnode => inode conversion, use passed inode directly
* Don't allocate and free memory on each call
* As a consequence, don't have a chance to return ENOMEM, which would be
  truly bizarre error code for this ioctl.

Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---

 fs/xfs/linux-2.6/xfs_ioctl.c |    9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -763,6 +763,8 @@ xfs_ioctl(
                return xfs_ioc_fsgeometry(mp, arg);
 
        case XFS_IOC_GETVERSION:
+               return put_user(inode->i_generation, (int __user *)arg);
+
        case XFS_IOC_GETXFLAGS:
        case XFS_IOC_SETXFLAGS:
        case XFS_IOC_FSGETXATTR:
@@ -1264,13 +1266,6 @@ xfs_ioc_xattr(
                break;
        }
 
-       case XFS_IOC_GETVERSION: {
-               flags = vn_to_inode(vp)->i_generation;
-               if (copy_to_user(arg, &flags, sizeof(flags)))
-                       error = -EFAULT;
-               break;
-       }
-
        default:
                error = -ENOTTY;
                break;