Messages in this thread | | | Date | Sun, 16 Aug 2009 12:08:20 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] kmemleak: Ignore the aperture memory hole on x86_64 |
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* Catalin Marinas <catalin.marinas@arm.com> wrote:
> 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. > > Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> > Cc: Ingo Molnar <mingo@elte.hu> > --- > arch/x86/kernel/aperture_64.c | 5 +++++ > 1 files changed, 5 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c > index 676debf..cb690b3 100644 > --- a/arch/x86/kernel/aperture_64.c > +++ b/arch/x86/kernel/aperture_64.c > @@ -94,6 +94,11 @@ static u32 __init allocate_aperture(void) > * code for safe > */ > p = __alloc_bootmem_nopanic(aper_size, aper_size, 512ULL<<20); > + /* > + * Kmemleak should not scan this block as it may not be mapped via the > + * kernel direct mapping. > + */ > + kmemleak_ignore(p);
i tried this in -tip, it causes this build error:
arch/x86/kernel/aperture_64.c: In function ‘allocate_aperture’: arch/x86/kernel/aperture_64.c:101: error: implicit declaration of function ‘kmemleak_ignore’
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