idr: create idr_layer_cache at boot time
Avoid a possible kmem_cache_create() failure by creating idr_layer_cache
unconditionary at boot time rather than creating it on-demand when idr_init()
is called the first time.
This change also enables us to eliminate the check every time idr_init() is
called.
[akpm@linux-foundation.org: rename init_id_cache() to idr_init_cache()]
[akpm@linux-foundation.org: fix alpha build]
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/init/main.c b/init/main.c
index c62c98f..624266b 100644
--- a/init/main.c
+++ b/init/main.c
@@ -58,6 +58,7 @@
#include <linux/kthread.h>
#include <linux/sched.h>
#include <linux/signal.h>
+#include <linux/idr.h>
#include <asm/io.h>
#include <asm/bugs.h>
@@ -637,6 +638,7 @@
enable_debug_pagealloc();
cpu_hotplug_init();
kmem_cache_init();
+ idr_init_cache();
setup_per_cpu_pageset();
numa_policy_init();
if (late_time_init)