diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/head_32.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index 9150ca9b5f80..0fa8a972a679 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S | |||
| @@ -51,6 +51,15 @@ | |||
| 51 | */ | 51 | */ |
| 52 | LOW_PAGES = 1<<(32-PAGE_SHIFT_asm) | 52 | LOW_PAGES = 1<<(32-PAGE_SHIFT_asm) |
| 53 | 53 | ||
| 54 | /* | ||
| 55 | * To preserve the DMA pool in PAGEALLOC kernels, we'll allocate | ||
| 56 | * pagetables from above the 16MB DMA limit, so we'll have to set | ||
| 57 | * up pagetables 16MB more (worst-case): | ||
| 58 | */ | ||
| 59 | #ifdef CONFIG_DEBUG_PAGEALLOC | ||
| 60 | LOW_PAGES = LOW_PAGES + 0x1000000 | ||
| 61 | #endif | ||
| 62 | |||
| 54 | #if PTRS_PER_PMD > 1 | 63 | #if PTRS_PER_PMD > 1 |
| 55 | PAGE_TABLE_SIZE = (LOW_PAGES / PTRS_PER_PMD) + PTRS_PER_PGD | 64 | PAGE_TABLE_SIZE = (LOW_PAGES / PTRS_PER_PMD) + PTRS_PER_PGD |
| 56 | #else | 65 | #else |