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idr: create idr_layer_cache at boot time

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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>
This commit is contained in:
Akinobu Mita 2008-04-29 01:03:13 -07:00 • committed by Linus Torvalds
commit 199f0ca514
3 changed files with 9 additions and 6 deletions
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3
include/linux/idr.h
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@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/init.h>
#if BITS_PER_LONG == 32
# define IDR_BITS 5
@ -115,4 +116,6 @@ void ida_remove(struct ida *ida, int id);
void ida_destroy(struct ida *ida);
void ida_init(struct ida *ida);
void __init idr_init_cache(void);
#endif /* __IDR_H__ */