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

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

[Stephen Rothwell]

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Hi Andrew,

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

In file included from arch/powerpc/kernel/asm-offsets.c:16:0:
include/linux/signal.h: In function 'sigisemptyset':
include/linux/signal.h:79:3: error: implicit declaration of function 'BUILD_BUG' [-Werror=implicit-function-declaration]
   BUILD_BUG();
   ^

Caused by commit 7e52cdba7e69 ("signal: use BUILD_BUG() instead of
_NSIG_WORDS_is_unsupported_size()").

See Rule 1 in Documentation/SubmitChecklist.

Thanks to Guenter for the heads up.

I have added the following patch for today (hopefully it does not cause
more problems).

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Fri, 26 Sep 2014 20:08:12 +1000
Subject: [PATCH] signal.h: using BUILD_BUG requires including bug.h

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
 include/linux/signal.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/signal.h b/include/linux/signal.h
index 14acfd59ed1b..ab1e0392b5ac 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -2,6 +2,7 @@
 #define _LINUX_SIGNAL_H
 
 #include <linux/list.h>
+#include <linux/bug.h>
 #include <uapi/linux/signal.h>
 
 struct task_struct;
-- 
2.1.1

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

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[PATCH -mm] signal-use-build_bug-instead-of-_nsig_words_is_unsupported_size.fix

[Oleg Nesterov]

From: Stephen Rothwell <sfr@canb.auug.org.au>

Fixes signal-use-build_bug-instead-of-_nsig_words_is_unsupported_size.patch
which caused the build failure on powerpc.

Add missing "include <linux/bug.h>" which defines BUILD_BUG()
used by that patch.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 include/linux/signal.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/linux/signal.h b/include/linux/signal.h
index 14acfd5..ab1e039 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -2,6 +2,7 @@
 #define _LINUX_SIGNAL_H
 
 #include <linux/list.h>
+#include <linux/bug.h>
 #include <uapi/linux/signal.h>
 
 struct task_struct;
-- 
1.5.5.1