linux-kernel - linux-next: build failure after merge of the origin tree

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Date:   Fri, 31 Jul 2020 08:58:36 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Willy Tarreau <w@....eu>, Russell King <linux@...linux.org.uk>,
        Linux Arm Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: linux-next: build failure after merge of the origin tree

Hi all,

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

In file included from include/linux/random.h:14,
                 from arch/arm/kernel/signal.c:8:
arch/arm/include/asm/percpu.h: In function '__my_cpu_offset':
arch/arm/include/asm/percpu.h:29:34: error: 'current_stack_pointer' undeclared (first use in this function); did you mean 'user_stack_pointer'?
   29 |   : "Q" (*(const unsigned long *)current_stack_pointer));
      |                                  ^~~~~~~~~~~~~~~~~~~~~
      |                                  user_stack_pointer

Presumably aused by commit

  1c9df907da83 ("random: fix circular include dependency on arm64 after addition of percpu.h")

I have added this fix patch for today:

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Fri, 31 Jul 2020 08:50:31 +1000
Subject: [PATCH] arm: include asm/thread_info.h in asm/percpu.h

This need was uncovered by commit

  1c9df907da83 ("random: fix circular include dependency on arm64 after addition of percpu.h")

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 arch/arm/include/asm/percpu.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/include/asm/percpu.h b/arch/arm/include/asm/percpu.h
index f44f448537f2..ebfa06bebea5 100644
--- a/arch/arm/include/asm/percpu.h
+++ b/arch/arm/include/asm/percpu.h
@@ -10,6 +10,9 @@
  * in the TPIDRPRW. TPIDRPRW only exists on V6K and V7
  */
 #if defined(CONFIG_SMP) && !defined(CONFIG_CPU_V6)
+
+#include <asm/thread_info.h>	/* for current_stack_pointer */
+
 static inline void set_my_cpu_offset(unsigned long off)
 {
 	/* Set TPIDRPRW */
-- 
2.27.0

-- 
Cheers,
Stephen Rothwell

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