linux-next: build failure after merge of the tip tree

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Hi all,

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


Caused by commit

  f670269a42bf ("x86: Fix early boot crash on gcc-10, next try")

interacting with commit

  a9a3ed1eff36 ("x86: Fix early boot crash on gcc-10, third try")

from Linus' tree (v5.7-rc6) - the automatic merge did not go well.

I have added this patch for today (it removes the older version).

From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Thu, 3 Sep 2020 12:31:13 +1000
Subject: [PATCH] merge fix for compiler.h

Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
 include/linux/compiler.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index d60365d4fb56..b78233fb1af7 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -223,12 +223,6 @@ static inline void *offset_to_ptr(const int *off)
 /* &a[0] degrades to a pointer: a different type from an array */
 #define __must_be_array(a)	BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
 
-/*
- * This is needed in functions which generate the stack canary, see
- * arch/x86/kernel/smpboot.c::start_secondary() for an example.
- */
-#define prevent_tail_call_optimization()	mb()
-
 #include <asm/rwonce.h>
 
 /*
-- 
2.28.0

-- 
Cheers,
Stephen Rothwell

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