From 0cda763f95eaf5a94044fd47cee04f21d8346425 Mon Sep 17 00:00:00 2001
From: Tomoki Shirasawa <tomoki.shirasawa.kk@hitachi-solutions.com>
Date: Mon, 25 Dec 2017 16:08:51 +0900
Subject: [PATCH] fix /proc/*/pagemap refs #387

---
 arch/x86_64/kernel/memory.c | 2 +-
 kernel/procfs.c             | 6 ------
 2 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/x86_64/kernel/memory.c b/arch/x86_64/kernel/memory.c
index b5c5c046..74296236 100644
--- a/arch/x86_64/kernel/memory.c
+++ b/arch/x86_64/kernel/memory.c
@@ -493,7 +493,7 @@ uint64_t ihk_mc_pt_virt_to_pagemap(struct page_table *pt, unsigned long virt)
 
 	error = ihk_mc_pt_virt_to_phys(pt, (void *)virt, &phys);
 	if (error) {
-		return 0;
+		return PM_PSHIFT(PAGE_SHIFT);
 	}
 
 	pagemap = PM_PFRAME(phys >> PAGE_SHIFT);
diff --git a/kernel/procfs.c b/kernel/procfs.c
index e61e95f3..f6f37005 100644
--- a/kernel/procfs.c
+++ b/kernel/procfs.c
@@ -422,12 +422,6 @@ void process_procfs_request(struct ikc_scd_packet *rpacket)
 	if (strcmp(p, "pagemap") == 0) {
 		uint64_t *_buf = (uint64_t *)buf;
 		uint64_t start, end;
-		
-		if (offset < PAGE_SIZE) {
-			kprintf("WARNING: /proc/pagemap queried for NULL page\n");
-			ans = 0;
-			goto end;
-		}
 
 		/* Check alignment */
 		if ((offset % sizeof(uint64_t) != 0) ||