Btrfs: clean up btrfs_ioctl a little bit
Provide a void __user *argp pointer so that we can avoid duplicating
the cast for various sub-command calls.
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index cc7c516..d2d5a5a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1117,20 +1117,21 @@
cmd, unsigned long arg)
{
struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
+ void __user *argp = (void __user *)arg;
switch (cmd) {
case BTRFS_IOC_SNAP_CREATE:
- return btrfs_ioctl_snap_create(file, (void __user *)arg, 0);
+ return btrfs_ioctl_snap_create(file, argp, 0);
case BTRFS_IOC_SUBVOL_CREATE:
- return btrfs_ioctl_snap_create(file, (void __user *)arg, 1);
+ return btrfs_ioctl_snap_create(file, argp, 1);
case BTRFS_IOC_DEFRAG:
return btrfs_ioctl_defrag(file);
case BTRFS_IOC_RESIZE:
- return btrfs_ioctl_resize(root, (void __user *)arg);
+ return btrfs_ioctl_resize(root, argp);
case BTRFS_IOC_ADD_DEV:
- return btrfs_ioctl_add_dev(root, (void __user *)arg);
+ return btrfs_ioctl_add_dev(root, argp);
case BTRFS_IOC_RM_DEV:
- return btrfs_ioctl_rm_dev(root, (void __user *)arg);
+ return btrfs_ioctl_rm_dev(root, argp);
case BTRFS_IOC_BALANCE:
return btrfs_balance(root->fs_info->dev_root);
case BTRFS_IOC_CLONE: