kmemcheck: don't track page tables
As these are allocated using the page allocator, we need to pass
__GFP_NOTRACK before we add page allocator support to kmemcheck.
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 52bb951..9c54329 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -104,7 +104,7 @@
void *ptr;
if (after_bootmem)
- ptr = (void *) get_zeroed_page(GFP_ATOMIC);
+ ptr = (void *) get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK);
else
ptr = alloc_bootmem_pages(PAGE_SIZE);
@@ -281,7 +281,7 @@
void *adr;
if (after_bootmem) {
- adr = (void *)get_zeroed_page(GFP_ATOMIC);
+ adr = (void *)get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK);
*phys = __pa(adr);
return adr;
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 6ce9518..3cfe9ce 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -470,7 +470,7 @@
if (!debug_pagealloc)
spin_unlock(&cpa_lock);
- base = alloc_pages(GFP_KERNEL, 0);
+ base = alloc_pages(GFP_KERNEL | __GFP_NOTRACK, 0);
if (!debug_pagealloc)
spin_lock(&cpa_lock);
if (!base)
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 7aa03a5..8e43bdd 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -4,9 +4,11 @@
#include <asm/tlb.h>
#include <asm/fixmap.h>
+#define PGALLOC_GFP GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO
+
pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
- return (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+ return (pte_t *)__get_free_page(PGALLOC_GFP);
}
pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
@@ -14,9 +16,9 @@
struct page *pte;
#ifdef CONFIG_HIGHPTE
- pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO, 0);
+ pte = alloc_pages(PGALLOC_GFP | __GFP_HIGHMEM, 0);
#else
- pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+ pte = alloc_pages(PGALLOC_GFP, 0);
#endif
if (pte)
pgtable_page_ctor(pte);
@@ -161,7 +163,7 @@
bool failed = false;
for(i = 0; i < PREALLOCATED_PMDS; i++) {
- pmd_t *pmd = (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
+ pmd_t *pmd = (pmd_t *)__get_free_page(PGALLOC_GFP);
if (pmd == NULL)
failed = true;
pmds[i] = pmd;
@@ -228,7 +230,7 @@
pmd_t *pmds[PREALLOCATED_PMDS];
unsigned long flags;
- pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
+ pgd = (pgd_t *)__get_free_page(PGALLOC_GFP);
if (pgd == NULL)
goto out;