[POWERPC] spufs: Refuse to load the module when not running on cell

As noticed by David Woodhouse, it's currently possible to mount
spufs on any machine, which means that it actually will get
mounted by fedora.
This refuses to load the module on platforms that have no
support for SPUs.

Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 7150730e2ff11b9896039bd46a05ef83c8d26931..01c4805986f231a96acb517141bafa4b01b3a8e2 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -600,6 +600,10 @@ spufs_create_root(struct super_block *sb, void *data)
        struct inode *inode;
        int ret;
 
+       ret = -ENODEV;
+       if (!spu_management_ops)
+               goto out;
+
        ret = -ENOMEM;
        inode = spufs_new_inode(sb, S_IFDIR | 0775);
        if (!inode)