diff options
Diffstat (limited to 'arch/x86/mm/ioremap_64.c')
| -rw-r--r-- | arch/x86/mm/ioremap_64.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/mm/ioremap_64.c b/arch/x86/mm/ioremap_64.c index 2815ab60009..0a05f024dc2 100644 --- a/arch/x86/mm/ioremap_64.c +++ b/arch/x86/mm/ioremap_64.c @@ -41,8 +41,15 @@ ioremap_change_attr(unsigned long phys_addr, unsigned long size, if (phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT)) { unsigned long npages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; unsigned long vaddr = (unsigned long) __va(phys_addr); + int level; /* + * If there is no identity map for this address, + * change_page_attr_addr is unnecessary + */ + if (!lookup_address(vaddr, &level)) + return err; + /* * Must use a address here and not struct page because the phys addr * can be a in hole between nodes and not have an memmap entry. */ |