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| author | Vegard Nossum <vegard.nossum@gmail.com> | 2008-04-04 00:53:23 +0200 |
|---|---|---|
| committer | Vegard Nossum <vegard.nossum@gmail.com> | 2009-06-15 12:40:02 +0200 |
| commit | f85612967c93b67b10dd240e3e8bf8a0eee9def7 (patch) | |
| tree | 184a70bc888b35235ee0b1805a06f90fd45295d8 /arch/x86/mm/init.c | |
| parent | f8b4ece2a94693b7d2dd32ea716cb92545b5dce6 (diff) | |
| download | linux-f85612967c93b67b10dd240e3e8bf8a0eee9def7.tar.gz linux-f85612967c93b67b10dd240e3e8bf8a0eee9def7.tar.bz2 linux-f85612967c93b67b10dd240e3e8bf8a0eee9def7.zip | |
x86: add hooks for kmemcheck
The hooks that we modify are:
- Page fault handler (to handle kmemcheck faults)
- Debug exception handler (to hide pages after single-stepping
the instruction that caused the page fault)
Also redefine memset() to use the optimized version if kmemcheck is
enabled.
(Thanks to Pekka Enberg for minimizing the impact on the page fault
handler.)
As kmemcheck doesn't handle MMX/SSE instructions (yet), we also disable
the optimized xor code, and rely instead on the generic C implementation
in order to avoid false-positive warnings.
Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>
[whitespace fixlet]
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
[rebased for mainline inclusion]
Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>
Diffstat (limited to 'arch/x86/mm/init.c')
| -rw-r--r-- | arch/x86/mm/init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 34c1bfb64f1c..f53b57e4086f 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -213,7 +213,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, if (!after_bootmem) init_gbpages(); -#ifdef CONFIG_DEBUG_PAGEALLOC +#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KMEMCHECK) /* * For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages. * This will simplify cpa(), which otherwise needs to support splitting |