[PATCH 4.14 086/109] ARM: bugs: prepare processor bug infrastructure

Greg Kroah-Hartman
2018-10-16T17:22:36Z

From: Russell King <rmk+kernel@armlinux.org.uk>

Commit a5b9177f69329314721aa7022b7e69dab23fa1f0 upstream.

Prepare the processor bug infrastructure so that it can be expanded to
check for per-processor bugs.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Boot-tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm/include/asm/bugs.h | 4 ++--
arch/arm/kernel/Makefile | 1 +
arch/arm/kernel/bugs.c | 9 +++++++++
3 files changed, 12 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/kernel/bugs.c

--- a/arch/arm/include/asm/bugs.h
+++ b/arch/arm/include/asm/bugs.h
@@ -10,10 +10,10 @@
#ifndef __ASM_BUGS_H
#define __ASM_BUGS_H

-#ifdef CONFIG_MMU
extern void check_writebuffer_bugs(void);

-#define check_bugs() check_writebuffer_bugs()
+#ifdef CONFIG_MMU
+extern void check_bugs(void);
#else
#define check_bugs() do { } while (0)
#endif
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -31,6 +31,7 @@ else
obj-y += entry-armv.o
endif

+obj-$(CONFIG_MMU) += bugs.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_ISA_DMA_API) += dma.o
obj-$(CONFIG_FIQ) += fiq.o fiqasm.o
--- /dev/null
+++ b/arch/arm/kernel/bugs.c
@@ -0,0 +1,9 @@
+// SPDX-Identifier: GPL-2.0
+#include <linux/init.h>
+#include <asm/bugs.h>
+#include <asm/proc-fns.h>
+
+void __init check_bugs(void)
+{
+ check_writebuffer_bugs();
+}