summaryrefslogtreecommitdiffstats
path: root/arch/x86/mm/init_32.c
diff options
context:
space:
mode:
authorVegard Nossum <vegard.nossum@gmail.com>2008-04-04 00:53:23 +0200
committerVegard Nossum <vegard.nossum@gmail.com>2009-06-15 12:40:02 +0200
commitf85612967c93b67b10dd240e3e8bf8a0eee9def7 (patch)
tree184a70bc888b35235ee0b1805a06f90fd45295d8 /arch/x86/mm/init_32.c
parentf8b4ece2a94693b7d2dd32ea716cb92545b5dce6 (diff)
downloadlinux-f85612967c93b67b10dd240e3e8bf8a0eee9def7.tar.bz2
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_32.c')
-rw-r--r--arch/x86/mm/init_32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 949708d7a481..80cafd76a2bd 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -111,7 +111,7 @@ static pte_t * __init one_page_table_init(pmd_t *pmd)
pte_t *page_table = NULL;
if (after_bootmem) {
-#ifdef CONFIG_DEBUG_PAGEALLOC
+#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KMEMCHECK)
page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
#endif
if (!page_table)