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idr: don't need to shink the free list when idr_remove() 

After idr subsystem is changed to RCU-awared, the free layer will not go
to the free list.  The free list will not be filled up when
idr_remove().  So we don't need to shink it too.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lai Jiangshan 2014-06-06 14:37:13 -07:00 committed by Linus Torvalds
parent b93804b2fc
commit aefb768297
1 changed files with 0 additions and 16 deletions
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16
lib/idr.c
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@ -18,12 +18,6 @@
* pointer or what ever, we treat it as a (void *). You can pass this * pointer or what ever, we treat it as a (void *). You can pass this
* id to a user for him to pass back at a later time. You then pass * id to a user for him to pass back at a later time. You then pass
* that id to this code and it returns your pointer. * that id to this code and it returns your pointer.
* You can release ids at any time. When all ids are released, most of
* the memory is returned (we keep MAX_IDR_FREE) in a local pool so we
* don't need to go to the memory "store" during an id allocate, just
* so you don't need to be too concerned about locking and conflicts
* with the slab allocator.
*/ */
#ifndef TEST // to test in user space... #ifndef TEST // to test in user space...
@ -584,16 +578,6 @@ void idr_remove(struct idr *idp, int id)
bitmap_clear(to_free->bitmap, 0, IDR_SIZE); bitmap_clear(to_free->bitmap, 0, IDR_SIZE);
free_layer(idp, to_free); free_layer(idp, to_free);
} }
while (idp->id_free_cnt >= MAX_IDR_FREE) {
p = get_from_free_list(idp);
/*
* Note: we don't call the rcu callback here, since the only
* layers that fall into the freelist are those that have been
* preallocated.
*/
kmem_cache_free(idr_layer_cache, p);
}
return;
} }
EXPORT_SYMBOL(idr_remove); EXPORT_SYMBOL(idr_remove);