[slubllv4 11/16] slub: Disable interrupts in free_debug processing

[Christoph Lameter <cl@linux.com>]

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We will be calling free_debug_processing with interrupts disabled
in some case when the later patches are applied. Some of the
functions called by free_debug_processing expect interrupts to be
off.

Signed-off-by: Christoph Lameter <cl@linux.com>


---
 mm/slub.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2011-04-15 13:15:04.000000000 -0500
+++ linux-2.6/mm/slub.c	2011-04-15 13:15:06.000000000 -0500
@@ -1023,6 +1023,10 @@ bad:
 static noinline int free_debug_processing(struct kmem_cache *s,
 		 struct page *page, void *object, unsigned long addr)
 {
+	unsigned long flags;
+
+	local_irq_save(flags);
+
 	slab_lock(page);
 
 	if (!check_slab(s, page))
@@ -1061,11 +1065,13 @@ static noinline int free_debug_processin
 	trace(s, page, object, 0);
 	init_object(s, object, SLUB_RED_INACTIVE);
 	slab_unlock(page);
+	local_irq_restore(flags);
 	return 1;
 
 fail:
 	slab_fix(s, "Object at 0x%p not freed", object);
 	slab_unlock(page);
+	local_irq_restore(flags);
 	return 0;
 }