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authorCatalin Marinas <catalin.marinas@arm.com>2009-08-27 14:29:20 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2009-09-01 11:12:32 +0100
commitacde31dc467797ccae3a55b791a77af446cce018 (patch)
treeef7a46bef9485830cc8f104889def098e1604eb7 /arch/x86/kernel/pci-dma.c
parent0494e08281d08f0a3dc442eb5e5cecc125b53b27 (diff)
downloadop-kernel-dev-acde31dc467797ccae3a55b791a77af446cce018.zip
op-kernel-dev-acde31dc467797ccae3a55b791a77af446cce018.tar.gz
kmemleak: Ignore the aperture memory hole on x86_64
This block is allocated with alloc_bootmem() and scanned by kmemleak but the kernel direct mapping may no longer exist. This patch tells kmemleak to ignore this memory hole. The dma32_bootmem_ptr in dma32_reserve_bootmem() is also ignored. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/pci-dma.c')
-rw-r--r--arch/x86/kernel/pci-dma.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 1a041bc..fa80f60 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -3,6 +3,7 @@
#include <linux/dmar.h>
#include <linux/bootmem.h>
#include <linux/pci.h>
+#include <linux/kmemleak.h>
#include <asm/proto.h>
#include <asm/dma.h>
@@ -88,6 +89,11 @@ void __init dma32_reserve_bootmem(void)
size = roundup(dma32_bootmem_size, align);
dma32_bootmem_ptr = __alloc_bootmem_nopanic(size, align,
512ULL<<20);
+ /*
+ * Kmemleak should not scan this block as it may not be mapped via the
+ * kernel direct mapping.
+ */
+ kmemleak_ignore(dma32_bootmem_ptr);
if (dma32_bootmem_ptr)
dma32_bootmem_size = size;
else
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