[PATCH 1/3] x86/mm: Check for pfn instead of page in vmalloc_sync_one()

[Joerg Roedel]

From: Joerg Roedel <jroe...@suse.de>

Do not require a struct page for the mapped memory location
because it might not exist. This can happen when an
ioremapped region is mapped with 2MB pages.

Fixes: 5d72b4fba40ef ('x86, mm: support huge I/O mapping capability I/F')
Signed-off-by: Joerg Roedel <jroe...@suse.de>
---
 arch/x86/mm/fault.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 794f364cb882..4a4049f6d458 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -200,7 +200,7 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned 
long address)
        if (!pmd_present(*pmd))
                set_pmd(pmd, *pmd_k);
        else
-               BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
+               BUG_ON(pmd_pfn(*pmd) != pmd_pfn(*pmd_k));
 
        return pmd_k;
 }
-- 
2.17.1