btrfs: Fix up 32/64-bit compatibility for new ioctls

 This patch casts to unsigned long before casting to a pointer and fixes
 the following warnings:
fs/btrfs/extent_io.c:2289:20: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
fs/btrfs/ioctl.c:2933:37: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
fs/btrfs/ioctl.c:2937:21: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
fs/btrfs/ioctl.c:3020:21: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
fs/btrfs/scrub.c:275:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
fs/btrfs/backref.c:686:27: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 4a34c472f126..bda53fcd1a09 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2930,11 +2930,13 @@ static long btrfs_ioctl_ino_to_path(struct btrfs_root *root, void __user *arg)
                 goto out;
 
         for (i = 0; i < ipath->fspath->elem_cnt; ++i) {
-                rel_ptr = ipath->fspath->val[i] - (u64)ipath->fspath->val;
+                rel_ptr = ipath->fspath->val[i] -
+                          (u64)(unsigned long)ipath->fspath->val;
                 ipath->fspath->val[i] = rel_ptr;
         }
 
-        ret = copy_to_user((void *)ipa->fspath, (void *)ipath->fspath, size);
+        ret = copy_to_user((void *)(unsigned long)ipa->fspath,
+                           (void *)(unsigned long)ipath->fspath, size);
         if (ret) {
                 ret = -EFAULT;
                 goto out;
@@ -3017,7 +3019,8 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
         if (ret < 0)
                 goto out;
 
-        ret = copy_to_user((void *)loi->inodes, (void *)inodes, size);
+        ret = copy_to_user((void *)(unsigned long)loi->inodes,
+                           (void *)(unsigned long)inodes, size);
         if (ret)
                 ret = -EFAULT;