fs: remove the unused mempages parameter

Since the mempages parameter is actually not used, they should be removed.

Now there is only files_init use the mempages parameter,

 	files_init(mempages);

but I don't think the adaptation to mempages in files_init is really
useful; and if files_init also changed to the prototype void (*func)(void),
the wrapper vfs_caches_init would also not need the mempages parameter.

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/dcache.c b/fs/dcache.c
index 7da0cf5..920c877 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2108,7 +2108,7 @@
 		INIT_HLIST_HEAD(&dentry_hashtable[loop]);
 }
 
-static void __init dcache_init(unsigned long mempages)
+static void __init dcache_init(void)
 {
 	int loop;
 
@@ -2170,10 +2170,10 @@
 	filp_cachep = kmem_cache_create("filp", sizeof(struct file), 0,
 			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
 
-	dcache_init(mempages);
-	inode_init(mempages);
+	dcache_init();
+	inode_init();
 	files_init(mempages);
-	mnt_init(mempages);
+	mnt_init();
 	bdev_cache_init();
 	chrdev_init();
 }