Subject: [PATCH for-stable-v4.4 21/53] ARM: bugs: prepare processor bug infrastructure

From: Ard Biesheuvel <[email-masked]>
Date: Tue, 5 Nov 2019 21:58:14 +0100

From: Russell King <[email-masked]>

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 <[email-masked]>
Reviewed-by: Florian Fainelli <[email-masked]>
Boot-tested-by: Tony Lindgren <[email-masked]>
Reviewed-by: Tony Lindgren <[email-masked]>
Acked-by: Marc Zyngier <[email-masked]>
Signed-off-by: David A. Long <[email-masked]>
Signed-off-by: Greg Kroah-Hartman <[email-masked]>
Signed-off-by: Ard Biesheuvel <[email-masked]>
---
 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(-)

diff --git a/arch/arm/include/asm/bugs.h b/arch/arm/include/asm/bugs.h
index a97f1ea708d1..ed122d294f3f 100644
--- 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
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 82bdac0f2804..649bc3300c93 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -30,6 +30,7 @@ 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
diff --git a/arch/arm/kernel/bugs.c b/arch/arm/kernel/bugs.c
new file mode 100644
index 000000000000..88024028bb70
--- /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();
+}
-- 
2.17.1

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