diff options
author | Dan Williams <dan.j.williams@intel.com> | 2017-11-15 16:56:11 -0800 |
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committer | Dan Williams <dan.j.williams@intel.com> | 2017-11-15 16:56:11 -0800 |
commit | 4247f24c23589bcc3bc3490515ef8c9497e9ae55 (patch) | |
tree | 89726a0e171c443a3e8def2992b56dbd8a21df21 /arch/x86/xen/mmu_pv.c | |
parent | 79ab67ede21f536851a99ea68ee6fc1f5435e055 (diff) | |
parent | 9f586fff6574f6ecbf323f92d44ffaf0d96225fe (diff) |
Merge branch 'for-4.15/dax' into libnvdimm-for-next
Diffstat (limited to 'arch/x86/xen/mmu_pv.c')
-rw-r--r-- | arch/x86/xen/mmu_pv.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index 7330cb3b2283..71495f1a86d7 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -1238,21 +1238,16 @@ static void __init xen_pagetable_cleanhighmap(void) * from _brk_limit way up to the max_pfn_mapped (which is the end of * the ramdisk). We continue on, erasing PMD entries that point to page * tables - do note that they are accessible at this stage via __va. - * For good measure we also round up to the PMD - which means that if + * As Xen is aligning the memory end to a 4MB boundary, for good + * measure we also round up to PMD_SIZE * 2 - which means that if * anybody is using __ka address to the initial boot-stack - and try * to use it - they are going to crash. The xen_start_info has been * taken care of already in xen_setup_kernel_pagetable. */ addr = xen_start_info->pt_base; - size = roundup(xen_start_info->nr_pt_frames * PAGE_SIZE, PMD_SIZE); + size = xen_start_info->nr_pt_frames * PAGE_SIZE; - xen_cleanhighmap(addr, addr + size); + xen_cleanhighmap(addr, roundup(addr + size, PMD_SIZE * 2)); xen_start_info->pt_base = (unsigned long)__va(__pa(xen_start_info->pt_base)); -#ifdef DEBUG - /* This is superfluous and is not necessary, but you know what - * lets do it. The MODULES_VADDR -> MODULES_END should be clear of - * anything at this stage. */ - xen_cleanhighmap(MODULES_VADDR, roundup(MODULES_VADDR, PUD_SIZE) - 1); -#endif } #endif |