[PATCH] remove weird pmd cast

I don't know what this is trying to do.  It might be some kind of artifact
from when get_pgd_slow() was removed.  

The expanded expression with __pa() ends up looking something like this:

	(unsigned long)(u64)(u32)pmd-PAGE_OFFSET

and that is just nutty because pmd is a pointer now, anyway.

Attached patch removes the casts.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/mm/pgtable.c

@@ -233,7 +233,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 		pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
 		if (!pmd)
 			goto out_oom;
-		set_pgd(&pgd[i], __pgd(1 + __pa((u64)((u32)pmd))));
+		set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
 	}
 	return pgd;