BKL-removal: Implement a compat_ioctl handler for JFS

The ioctls were already compatible except for the actual values so this
was fairly easy to do.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>

5 files changed, 27 insertions, 0 deletions

diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 713ff4c2f80..7f6063acaa3 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -113,4 +113,7 @@ const struct file_operations jfs_file_operations = {
         .fsync          = jfs_fsync,
         .release        = jfs_release,
         .unlocked_ioctl = jfs_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl   = jfs_compat_ioctl,
+#endif
 };
diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
index fc82eccf408..a1f8e375ad2 100644
--- a/fs/jfs/ioctl.c
+++ b/fs/jfs/ioctl.c
@@ -117,3 +117,21 @@ long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
         }
 }
 
+#ifdef CONFIG_COMPAT
+long jfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+        /* While these ioctl numbers defined with 'long' and have different
+         * numbers than the 64bit ABI,
+         * the actual implementation only deals with ints and is compatible.
+         */
+        switch (cmd) {
+        case JFS_IOC_GETFLAGS32:
+                cmd = JFS_IOC_GETFLAGS;
+                break;
+        case JFS_IOC_SETFLAGS32:
+                cmd = JFS_IOC_SETFLAGS;
+                break;
+        }
+        return jfs_ioctl(filp, cmd, arg);
+}
+#endif
diff --git a/fs/jfs/jfs_dinode.h b/fs/jfs/jfs_dinode.h
index c387540d342..395c4c0d0f0 100644
--- a/fs/jfs/jfs_dinode.h
+++ b/fs/jfs/jfs_dinode.h
@@ -170,5 +170,7 @@ struct dinode {
 #define JFS_IOC_GETFLAGS        _IOR('f', 1, long)
 #define JFS_IOC_SETFLAGS        _IOW('f', 2, long)
 
+#define JFS_IOC_GETFLAGS32      _IOR('f', 1, int)
+#define JFS_IOC_SETFLAGS32      _IOW('f', 2, int)
 
 #endif /*_H_JFS_DINODE */
diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h
index 570fd5e3ef6..adb2fafcc54 100644
--- a/fs/jfs/jfs_inode.h
+++ b/fs/jfs/jfs_inode.h
@@ -23,6 +23,7 @@ struct fid;
 extern struct inode *ialloc(struct inode *, umode_t);
 extern int jfs_fsync(struct file *, struct dentry *, int);
 extern long jfs_ioctl(struct file *, unsigned int, unsigned long);
+extern long jfs_compat_ioctl(struct file *, unsigned int, unsigned long);
 extern struct inode *jfs_iget(struct super_block *, unsigned long);
 extern int jfs_commit_inode(struct inode *, int);
 extern int jfs_write_inode(struct inode*, int);
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 6440904a051..0ba6778edaa 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1557,6 +1557,9 @@ const struct file_operations jfs_dir_operations = {
         .readdir        = jfs_readdir,
         .fsync          = jfs_fsync,
         .unlocked_ioctl = jfs_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl   = jfs_compat_ioctl,
+#endif
 };
 
 static int jfs_ci_hash(struct dentry *dir, struct qstr *this)