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

From: Stephen Rothwell <[email-masked]>
Date: Tue, 25 Aug 2020 17:25:08 +1000

Hi all,

After merging the akpm-current tree, today's linux-next build (powerpc
allnoconfig) failed like this:

mm/memory.c: In function '__apply_to_page_range':
mm/memory.c:2358:13: error: 'ARCH_PAGE_TABLE_SYNC_MASK' undeclared (first use in this function)
 2358 |  if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~
mm/memory.c:2358:13: note: each undeclared identifier is reported only once for each function it appears in
mm/memory.c:2359:3: error: implicit declaration of function 'arch_sync_kernel_mappings' [-Werror=implicit-function-declaration]
 2359 |   arch_sync_kernel_mappings(start, start + size);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

Caused by commit

  a9354f1a10d5 ("mm: track page table modifications in __apply_to_page_range()")

I have added the following fix patch.

From: Stephen Rothwell <[email-masked]>
Date: Tue, 25 Aug 2020 17:17:12 +1000
Subject: [PATCH] ARCH_PAGE_TABLE_SYNC_MASK needs vmalloc.h

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 mm/memory.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/memory.c b/mm/memory.c
index 64352f8e3a70..fb5463153351 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -73,6 +73,7 @@
 #include <linux/numa.h>
 #include <linux/perf_event.h>
 #include <linux/ptrace.h>
+#include <linux/vmalloc.h>
 
 #include <trace/events/kmem.h>
 
-- 
2.28.0

-- 
Cheers,
Stephen Rothwell