files rcu optimization: Creates files_init_early()

This moves the creation of the filp cache into fs/file_table.c

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.18-rc6-mm2/include/linux/fs.h
===================================================================
--- linux-2.6.18-rc6-mm2.orig/include/linux/fs.h	2006-09-12 21:03:34.481426390 -0500
+++ linux-2.6.18-rc6-mm2/include/linux/fs.h	2006-09-12 21:03:48.919174241 -0500
@@ -296,6 +296,7 @@
 extern void __init inode_init_early(void);
 extern void __init mnt_init(unsigned long);
 extern void __init files_init(unsigned long);
+extern void __init files_init_early(void);
 
 struct buffer_head;
 typedef int (get_block_t)(struct inode *inode, sector_t iblock,
Index: linux-2.6.18-rc6-mm2/fs/file_table.c
===================================================================
--- linux-2.6.18-rc6-mm2.orig/fs/file_table.c	2006-09-12 21:03:34.406224700 -0500
+++ linux-2.6.18-rc6-mm2/fs/file_table.c	2006-09-12 21:03:48.943590374 -0500
@@ -35,6 +35,12 @@
 
 static struct percpu_counter nr_files __cacheline_aligned_in_smp;
 
+void __init files_init_early(void)
+{
+	filp_cachep = kmem_cache_create("filp", sizeof(struct file), 0,
+			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
+}
+
 static inline void file_free_rcu(struct rcu_head *head)
 {
 	struct file *f =  container_of(head, struct file, f_u.fu_rcuhead);
Index: linux-2.6.18-rc6-mm2/fs/dcache.c
===================================================================
--- linux-2.6.18-rc6-mm2.orig/fs/dcache.c	2006-09-12 17:07:55.410641382 -0500
+++ linux-2.6.18-rc6-mm2/fs/dcache.c	2006-09-12 21:03:48.987539413 -0500
@@ -2029,9 +2029,7 @@
 	names_cachep = kmem_cache_create("names_cache", PATH_MAX, 0,
 			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
 
-	filp_cachep = kmem_cache_create("filp", sizeof(struct file), 0,
-			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
-
+	files_init_early();
 	dcache_init(mempages);
 	inode_init(mempages);
 	files_init(mempages);