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slub: tidy up initialization ordering

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- free_kmem_cache_nodes() frees the cache node before nulling out a
   reference to it

 - init_kmem_cache_nodes() publishes the cache node before initializing
   it

Neither of these matter at runtime because the cache nodes cannot be
looked up by any other thread.  But it's neater and more consistent to
reorder these.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexander Potapenko <[email protected]>
Acked-by: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alexander Potapenko 2017-09-06 16:19:15 -07:00 • committed by Linus Torvalds
commit ea37df54d2
1 changed files with 2 additions and 2 deletions
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4
mm/slub.c
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@ -3358,8 +3358,8 @@ static void free_kmem_cache_nodes(struct kmem_cache *s)
struct kmem_cache_node *n;
for_each_kmem_cache_node(s, node, n) {
kmem_cache_free(kmem_cache_node, n);
s->node[node] = NULL;
kmem_cache_free(kmem_cache_node, n);
}
}
@ -3389,8 +3389,8 @@ static int init_kmem_cache_nodes(struct kmem_cache *s)
return 0;
}
s->node[node] = n;
init_kmem_cache_node(n);
s->node[node] = n;
}
return 1;
}