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authorDavid Rientjes <rientjes@google.com>2012-07-09 14:00:38 -0700
committerPekka Enberg <penberg@kernel.org>2012-07-10 22:43:52 +0300
commit737b719ed6569ffcd015fcdf3039dc7af47af877 (patch)
tree4a756eb46d499376763263e235568365049f06bc /mm
parent20cea9683ecc6dd75a80c0dd02dc69c64e95be75 (diff)
downloadop-kernel-dev-737b719ed6569ffcd015fcdf3039dc7af47af877.zip
op-kernel-dev-737b719ed6569ffcd015fcdf3039dc7af47af877.tar.gz
mm, slub: ensure irqs are enabled for kmemcheck
kmemcheck_alloc_shadow() requires irqs to be enabled, so wait to disable them until after its called for __GFP_WAIT allocations. This fixes a warning for such allocations: WARNING: at kernel/lockdep.c:2739 lockdep_trace_alloc+0x14e/0x1c0() Acked-by: Fengguang Wu <fengguang.wu@intel.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Tested-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slub.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 0e0504e..e517d43 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1299,13 +1299,7 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
stat(s, ORDER_FALLBACK);
}
- if (flags & __GFP_WAIT)
- local_irq_disable();
-
- if (!page)
- return NULL;
-
- if (kmemcheck_enabled
+ if (kmemcheck_enabled && page
&& !(s->flags & (SLAB_NOTRACK | DEBUG_DEFAULT_FLAGS))) {
int pages = 1 << oo_order(oo);
@@ -1321,6 +1315,11 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
kmemcheck_mark_unallocated_pages(page, pages);
}
+ if (flags & __GFP_WAIT)
+ local_irq_disable();
+ if (!page)
+ return NULL;
+
page->objects = oo_objects(oo);
mod_zone_page_state(page_zone(page),
(s->flags & SLAB_RECLAIM_ACCOUNT) ?
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