Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.19 17/42] x86/mm: Check for pfn instead of page in vmalloc_sync_one() | Date | Fri, 2 Aug 2019 09:22:37 -0400 |
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From: Joerg Roedel <jroedel@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 <jroedel@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lkml.kernel.org/r/20190719184652.11391-2-joro@8bytes.org Signed-off-by: Sasha Levin <sashal@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 9d9765e4d1ef1..4d12176a470ee 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -267,7 +267,7 @@ 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
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