linux-kernel - [PATCH] slab: add missing guard for kernel_map

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Date:	Fri, 22 May 2009 18:20:40 +0930
From:	Ron <ron@...ian.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	cl@...ux-foundation.org, mpm@...enic.com, linux-mm@...ck.org,
	akinobu.mita@...il.com, linux-kernel@...r.kernel.org
Subject: [PATCH] slab: add missing guard for kernel_map_pages() use


All other uses of kernel_map_pages() are explicitly excluded without
CONFIG_DEBUG_PAGEALLOC, this one should be too.

Signed-off-by: Ron Lee <ron@...ian.org>


diff --git a/mm/slab.c b/mm/slab.c
index 9a90b00..b5e5b27 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2674,10 +2683,12 @@ static void cache_init_objs(struct kmem_cache *cachep,
 				slab_error(cachep, "constructor overwrote the"
 					   " start of an object");
 		}
+#ifdef CONFIG_DEBUG_PAGEALLOC
 		if ((cachep->buffer_size % PAGE_SIZE) == 0 &&
 			    OFF_SLAB(cachep) && cachep->flags & SLAB_POISON)
 			kernel_map_pages(virt_to_page(objp),
 					 cachep->buffer_size / PAGE_SIZE, 0);
+#endif
 #else
 		if (cachep->ctor)
 			cachep->ctor(objp);


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