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SLUB: Make lockdep happy by not calling add_partial with interrupts enabled during bootstrap 

If we move the local_irq_enable() to the end of the function then
add_partial() in early_kmem_cache_node_alloc() will be called
with interrupts disabled like during regular operations.

This makes lockdep happy.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Tested-by: Andre Noll <maan@systemlinux.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter 2007-07-03 09:31:04 -07:00 committed by Linus Torvalds
parent 746976a301
commit dbc55faa64
1 changed files with 6 additions and 2 deletions
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8
mm/slub.c
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@ -1798,8 +1798,6 @@ static struct kmem_cache_node * __init early_kmem_cache_node_alloc(gfp_t gfpflag
BUG_ON(kmalloc_caches->size < sizeof(struct kmem_cache_node));
page = new_slab(kmalloc_caches, gfpflags | GFP_THISNODE, node);
/* new_slab() disables interupts */
local_irq_enable();
BUG_ON(!page);
n = page->freelist;
@ -1811,6 +1809,12 @@ static struct kmem_cache_node * __init early_kmem_cache_node_alloc(gfp_t gfpflag
init_kmem_cache_node(n);
atomic_long_inc(&n->nr_slabs);
add_partial(n, page);
/*
* new_slab() disables interupts. If we do not reenable interrupts here
* then bootup would continue with interrupts disabled.
*/
local_irq_enable();
return n;
}