Subject: linux-next: build failure after merge of the vfs tree

From: Stephen Rothwell <[email-masked]>
Date: Mon, 4 Dec 2017 10:16:36 +1100

Hi Al,

After merging the vfs tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

arch/powerpc/kvm/../../../virt/kvm/kvm_main.c: In function 'hva_to_pfn_slow':
arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:1379:35: error: 'start' undeclared (first use in this function)
  npages = get_user_pages_unlocked(start, 1, &page, flags);
                                   ^

Caused by commit

  eeb7c213c804 ("kvm: switch get_user_page_nowait() to get_user_pages_unlocked()")

I have applied the following fix patch for today:

From e9cc05c8ba9b9f19c62b74e81e4beb67ec9fc09e Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <[email-masked]>
Date: Mon, 4 Dec 2017 10:13:38 +1100
Subject: [PATCH] kvm: fix for "switch get_user_page_nowait() to get_user_pages_unlocked()"

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 virt/kvm/kvm_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 4f0f0045e634..7b4d46432c85 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1376,7 +1376,7 @@ static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault,
 	if (async)
 		flags |= FOLL_NOWAIT;
 
-	npages = get_user_pages_unlocked(start, 1, &page, flags);
+	npages = get_user_pages_unlocked(addr, 1, &page, flags);
 	if (npages != 1)
 		return npages;
 
-- 
2.15.0

-- 
Cheers,
Stephen Rothwell