3 files changed, 4 insertions, 5 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 47bc50fd4f55..82ce847318ae 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -4089,7 +4089,7 @@ void btrfs_test_inode_set_ops(struct inode *inode);
 
 /* ioctl.c */
 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-int btrfs_ioctl_get_supported_features(struct file *file, void __user *arg);
+int btrfs_ioctl_get_supported_features(void __user *arg);
 void btrfs_update_iflags(struct inode *inode);
 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
 int btrfs_is_empty_uuid(u8 *uuid);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index f4c6ed5c5300..dcda7ea1e928 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -5187,7 +5187,7 @@ out_unlock:
           .compat_ro_flags = BTRFS_FEATURE_COMPAT_RO_##suffix, \
           .incompat_flags = BTRFS_FEATURE_INCOMPAT_##suffix }
 
-int btrfs_ioctl_get_supported_features(struct file *file, void __user *arg)
+int btrfs_ioctl_get_supported_features(void __user *arg)
 {
         static const struct btrfs_ioctl_feature_flags features[3] = {
                 INIT_FEATURE_FLAGS(SUPP),
@@ -5466,7 +5466,7 @@ long btrfs_ioctl(struct file *file, unsigned int
         case BTRFS_IOC_SET_FSLABEL:
                 return btrfs_ioctl_set_fslabel(file, argp);
         case BTRFS_IOC_GET_SUPPORTED_FEATURES:
-                return btrfs_ioctl_get_supported_features(file, argp);
+                return btrfs_ioctl_get_supported_features(argp);
         case BTRFS_IOC_GET_FEATURES:
                 return btrfs_ioctl_get_features(file, argp);
         case BTRFS_IOC_SET_FEATURES:
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index dda6f64dfd73..737e6a85c71e 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2164,8 +2164,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
                 ret = !(fs_devices->num_devices == fs_devices->total_devices);
                 break;
         case BTRFS_IOC_GET_SUPPORTED_FEATURES:
-                ret = btrfs_ioctl_get_supported_features(NULL,
-                                (void __user*)arg);
+                ret = btrfs_ioctl_get_supported_features((void __user*)arg);
                 break;
         }