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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 8 Jan 2021 19:48:21 +0100
Subject: [PATCH] powerpc: Avoid recursive header includes
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.8-rt24.tar.xz
- The include of bug.h leads to an include of printk.h which gets back
to spinlock.h and complains then about missing xchg().
Remove bug.h and add bits.h which is needed for BITS_PER_BYTE.
- Avoid the "please don't include this file directly" error from
rwlock-rt. Allow an include from/with rtmutex.h.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
arch/powerpc/include/asm/cmpxchg.h | 2 +-
arch/powerpc/include/asm/simple_spinlock_types.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/arch/powerpc/include/asm/cmpxchg.h
+++ b/arch/powerpc/include/asm/cmpxchg.h
@@ -5,7 +5,7 @@
#ifdef __KERNEL__
#include <linux/compiler.h>
#include <asm/synch.h>
-#include <linux/bug.h>
+#include <linux/bits.h>
#ifdef __BIG_ENDIAN
#define BITOFF_CAL(size, off) ((sizeof(u32) - size - off) * BITS_PER_BYTE)
--- a/arch/powerpc/include/asm/simple_spinlock_types.h
+++ b/arch/powerpc/include/asm/simple_spinlock_types.h
@@ -2,7 +2,7 @@
#ifndef _ASM_POWERPC_SIMPLE_SPINLOCK_TYPES_H
#define _ASM_POWERPC_SIMPLE_SPINLOCK_TYPES_H
-#ifndef __LINUX_SPINLOCK_TYPES_H
+#if !defined(__LINUX_SPINLOCK_TYPES_H) && !defined(__LINUX_RT_MUTEX_H)
# error "please don't include this file directly"
#endif
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