Re: [PATCH 19/30] mm: use linear_page_[index, delta]() consistently

diff --git a/arch/x86/kernel/cpu/sgx/virt.c b/arch/x86/kernel/cpu/sgx/virt.c
index db6806c40483..6a1933ddc6fc 100644
--- a/arch/x86/kernel/cpu/sgx/virt.c
+++ b/arch/x86/kernel/cpu/sgx/virt.c

@@ -9,6 +9,7 @@

 #include <linux/miscdevice.h>
 #include <linux/mm.h>
 #include <linux/mman.h>
+#include <linux/pagemap.h>
 #include <linux/sched/mm.h>
 #include <linux/sched/signal.h>
 #include <linux/slab.h>

@@ -41,7 +42,7 @@ static int __sgx_vepc_fault(struct sgx_vepc *vepc,

 	WARN_ON(!mutex_is_locked(&vepc->lock));
 
 	/* Calculate index of EPC page in virtual EPC's page_array */
-	index = vma->vm_pgoff + PFN_DOWN(addr - vma->vm_start);
+	index = linear_page_index(vma, addr);