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Date:   Fri, 15 Oct 2021 20:29:08 +1100
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: linux-next: build failure after merge of the akpm-current tree
Message-ID: <20211015202908.1c417ae2@canb.auug.org.au>
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Hi all,

After merging the akpm-current tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

In file included from include/linux/rcupdate.h:28,
                 from include/linux/rculist.h:11,
                 from include/linux/pid.h:5,
                 from include/linux/sched.h:14,
                 from arch/arm/kernel/asm-offsets.c:11:
include/linux/bottom_half.h: In function 'local_bh_disable':
include/linux/bottom_half.h:19:24: error: '_THIS_IP_' undeclared (first use=
 in this function)
   19 |  __local_bh_disable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET);
      |                        ^~~~~~~~~
include/linux/bottom_half.h:19:24: note: each undeclared identifier is repo=
rted only once for each function it appears in
include/linux/bottom_half.h: In function 'local_bh_enable':
include/linux/bottom_half.h:32:23: error: '_THIS_IP_' undeclared (first use=
 in this function)
   32 |  __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET);
      |                       ^~~~~~~~~

Presumably caused by a commit in the series that starts with

  dcaf7a5f413b ("kernel.h: drop unneeded <linux/kernel.h> inclusion from ot=
her headers")

I have applied the following patch for today (though there may be a
better solution).

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Fri, 15 Oct 2021 19:58:46 +1100
Subject: [PATCH] bottom_half.h needs kernel.h

for _THIS_IP_ on arm at least

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

diff --git a/include/linux/bottom_half.h b/include/linux/bottom_half.h
index eed86eb0a1de..11d107d88d03 100644
--- a/include/linux/bottom_half.h
+++ b/include/linux/bottom_half.h
@@ -2,6 +2,7 @@
 #ifndef _LINUX_BH_H
 #define _LINUX_BH_H
=20
+#include <linux/kernel.h>
 #include <linux/preempt.h>
=20
 #if defined(CONFIG_PREEMPT_RT) || defined(CONFIG_TRACE_IRQFLAGS)
--=20
2.33.0

--=20
Cheers,
Stephen Rothwell

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