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| author | James Morris <jmorris@namei.org> | 2010-05-06 10:56:07 +1000 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-05-06 10:56:07 +1000 |
| commit | 0ffbe2699cda6afbe08501098dff8a8c2fe6ae09 (patch) | |
| tree | 81b1a2305d16c873371b65c5a863c0268036cefe /arch/mips/include/asm/pgtable-64.h | |
| parent | 4e5d6f7ec3833c0da9cf34fa5c53c6058c5908b6 (diff) | |
| parent | 7ebd467551ed6ae200d7835a84bbda0dcadaa511 (diff) | |
Merge branch 'master' into next
Diffstat (limited to 'arch/mips/include/asm/pgtable-64.h')
| -rw-r--r-- | arch/mips/include/asm/pgtable-64.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h index 26dc69d792a6..1be4b0fa30da 100644 --- a/arch/mips/include/asm/pgtable-64.h +++ b/arch/mips/include/asm/pgtable-64.h @@ -120,9 +120,14 @@ #endif #define FIRST_USER_ADDRESS 0UL -#define VMALLOC_START MAP_BASE +/* + * TLB refill handlers also map the vmalloc area into xuseg. Avoid + * the first couple of pages so NULL pointer dereferences will still + * reliably trap. + */ +#define VMALLOC_START (MAP_BASE + (2 * PAGE_SIZE)) #define VMALLOC_END \ - (VMALLOC_START + \ + (MAP_BASE + \ min(PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, \ (1UL << cpu_vmbits)) - (1UL << 32)) |