Commit 51b75b5b authored Jul 19, 2019 by Joerg Roedel Committed by Thomas Gleixner Jul 22, 2019

x86/mm: Check for pfn instead of page in vmalloc_sync_one()



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: 5d72b4fb ('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

parent 5f9e832c

arch/x86/mm/fault.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -183,7 +183,7 @@ 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;
		}

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