dax: use linear_page_index()
I was basically open-coding it (thanks to copying code from do_fault() which probably also needs to be fixed). Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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fs/dax.c
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fs/dax.c
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@ -529,7 +529,7 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address,
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if ((pmd_addr + PMD_SIZE) > vma->vm_end)
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return VM_FAULT_FALLBACK;
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pgoff = ((pmd_addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
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pgoff = linear_page_index(vma, pmd_addr);
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size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT;
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if (pgoff >= size)
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return VM_FAULT_SIGBUS;
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