From: Joerg Roedel <jroe...@suse.de> [ Upstream commit 51b75b5b563a2637f9d8dc5bd02a31b2ff9e5ea0 ]
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> Signed-off-by: Thomas Gleixner <t...@linutronix.de> Reviewed-by: Dave Hansen <dave.han...@linux.intel.com> Link: https://lkml.kernel.org/r/20190719184652.11391-2-j...@8bytes.org Signed-off-by: Sasha Levin <sas...@kernel.org> --- 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 462c5c30b9a21..f3511f1a8f0ea 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -222,7 +222,7 @@ 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; } -- 2.20.1