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| author | Catalin Marinas <catalin.marinas@arm.com> | 2014-06-13 09:44:21 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-06-24 14:29:46 +1000 |
| commit | a1d23d5c94256ffa0de510a3d59d6eff551d97ae (patch) | |
| tree | 0e7a431be4e12ad24c85fb82f17659398d9887f9 /arch | |
| parent | aa83f3d8979528d2e6e8ad0c155d8ecf4eaef2e2 (diff) | |
| download | linux-a1d23d5c94256ffa0de510a3d59d6eff551d97ae.tar.gz linux-a1d23d5c94256ffa0de510a3d59d6eff551d97ae.tar.bz2 linux-a1d23d5c94256ffa0de510a3d59d6eff551d97ae.zip | |
powerpc/kmemleak: Do not scan the DART table
The DART table allocation is registered to kmemleak via the
memblock_alloc_base() call. However, the DART table is later unmapped
and dart_tablebase VA no longer accessible. This patch tells kmemleak
not to scan this block and avoid an unhandled paging request.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/sysdev/dart_iommu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c index 62c47bb76517..9e5353ff6d1b 100644 --- a/arch/powerpc/sysdev/dart_iommu.c +++ b/arch/powerpc/sysdev/dart_iommu.c @@ -476,6 +476,11 @@ void __init alloc_dart_table(void) */ dart_tablebase = (unsigned long) __va(memblock_alloc_base(1UL<<24, 1UL<<24, 0x80000000L)); + /* + * The DART space is later unmapped from the kernel linear mapping and + * accessing dart_tablebase during kmemleak scanning will fault. + */ + kmemleak_no_scan((void *)dart_tablebase); printk(KERN_INFO "DART table allocated at: %lx\n", dart_tablebase); } |