12 files changed, 27 insertions, 41 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 45df48ba0b12..325d6f3a596a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -15,6 +15,8 @@ config ARM
         select CLONE_BACKWARDS
         select CPU_PM if (SUSPEND || CPU_IDLE)
         select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
+        select EDAC_SUPPORT
+        select EDAC_ATOMIC_SCRUB
         select GENERIC_ALLOCATOR
         select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
diff --git a/arch/arm/include/asm/edac.h b/arch/arm/include/asm/edac.h
index 0df7a2c1fc3d..5189fa819b60 100644
--- a/arch/arm/include/asm/edac.h
+++ b/arch/arm/include/asm/edac.h
@@ -18,11 +18,12 @@
 #define ASM_EDAC_H
 /*
  * ECC atomic, DMA, SMP and interrupt safe scrub function.
- * Implements the per arch atomic_scrub() that EDAC use for software
+ * Implements the per arch edac_atomic_scrub() that EDAC use for software
  * ECC scrubbing.  It reads memory and then writes back the original
  * value, allowing the hardware to detect and correct memory errors.
  */
-static inline void atomic_scrub(void *va, u32 size)
+
+static inline void edac_atomic_scrub(void *va, u32 size)
 {
 #if __LINUX_ARM_ARCH__ >= 6
         unsigned int *virt_addr = va;
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index f5016656494f..b65edf514b40 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -819,6 +819,7 @@ config CAVIUM_OCTEON_SOC
         select SYS_SUPPORTS_64BIT_KERNEL
         select SYS_SUPPORTS_BIG_ENDIAN
         select EDAC_SUPPORT
+        select EDAC_ATOMIC_SCRUB
         select SYS_SUPPORTS_LITTLE_ENDIAN
         select SYS_SUPPORTS_HOTPLUG_CPU if CPU_BIG_ENDIAN
         select SYS_HAS_EARLY_PRINTK
diff --git a/arch/mips/include/asm/edac.h b/arch/mips/include/asm/edac.h
index 94105d3f58f4..980b16527374 100644
--- a/arch/mips/include/asm/edac.h
+++ b/arch/mips/include/asm/edac.h
@@ -5,7 +5,7 @@
 
 /* ECC atomic, DMA, SMP and interrupt safe scrub function */
 
-static inline void atomic_scrub(void *va, u32 size)
+static inline void edac_atomic_scrub(void *va, u32 size)
 {
         unsigned long *virt_addr = va;
         unsigned long temp;
@@ -21,7 +21,7 @@ static inline void atomic_scrub(void *va, u32 size)
 
                 __asm__ __volatile__ (
                 "       .set    mips2                                   \n"
-                "1:     ll      %0, %1          # atomic_scrub          \n"
+                "1:     ll      %0, %1          # edac_atomic_scrub     \n"
                 "       addu    %0, $0                                  \n"
                 "       sc      %0, %1                                  \n"
                 "       beqz    %0, 1b                                  \n"
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 190cc48abc0c..5ef27113b898 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -153,6 +153,8 @@ config PPC
         select NO_BOOTMEM
         select HAVE_GENERIC_RCU_GUP
         select HAVE_PERF_EVENTS_NMI if PPC64
+        select EDAC_SUPPORT
+        select EDAC_ATOMIC_SCRUB
 
 config GENERIC_CSUM
         def_bool CPU_LITTLE_ENDIAN
diff --git a/arch/powerpc/include/asm/edac.h b/arch/powerpc/include/asm/edac.h
index 6ead88bbfbb8..5571e23d253e 100644
--- a/arch/powerpc/include/asm/edac.h
+++ b/arch/powerpc/include/asm/edac.h
@@ -12,11 +12,11 @@
 #define ASM_EDAC_H
 /*
  * ECC atomic, DMA, SMP and interrupt safe scrub function.
- * Implements the per arch atomic_scrub() that EDAC use for software
+ * Implements the per arch edac_atomic_scrub() that EDAC use for software
  * ECC scrubbing.  It reads memory and then writes back the original
  * value, allowing the hardware to detect and correct memory errors.
  */
-static __inline__ void atomic_scrub(void *va, u32 size)
+static __inline__ void edac_atomic_scrub(void *va, u32 size)
 {
         unsigned int *virt_addr = va;
         unsigned int temp;
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index a07e31b50d3f..59cf0b911898 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -28,6 +28,7 @@ config TILE
         select HAVE_DEBUG_STACKOVERFLOW
         select ARCH_WANT_FRAME_POINTERS
         select HAVE_CONTEXT_TRACKING
+        select EDAC_SUPPORT
 
 # FIXME: investigate whether we need/want these options.
 #       select HAVE_IOREMAP_PROT
diff --git a/arch/tile/include/asm/edac.h b/arch/tile/include/asm/edac.h
deleted file mode 100644
index 87fc83eeaffd..000000000000
--- a/arch/tile/include/asm/edac.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright 2011 Tilera Corporation. All Rights Reserved.
- *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-#ifndef _ASM_TILE_EDAC_H
-#define _ASM_TILE_EDAC_H
-
-/* ECC atomic, DMA, SMP and interrupt safe scrub function */
-
-static inline void atomic_scrub(void *va, u32 size)
-{
-        /*
-         * These is nothing to be done here because CE is
-         * corrected by the mshim.
-         */
-        return;
-}
-
-#endif /* _ASM_TILE_EDAC_H */
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 226d5696e1d1..482c160a9fe9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -143,6 +143,8 @@ config X86
         select ACPI_LEGACY_TABLES_LOOKUP if ACPI
         select X86_FEATURE_NAMES if PROC_FS
         select SRCU
+        select EDAC_SUPPORT
+        select EDAC_ATOMIC_SCRUB
 
 config INSTRUCTION_DECODER
         def_bool y
diff --git a/arch/x86/include/asm/edac.h b/arch/x86/include/asm/edac.h
index e9b57ecc70c5..cf8fdf83b231 100644
--- a/arch/x86/include/asm/edac.h
+++ b/arch/x86/include/asm/edac.h
@@ -3,7 +3,7 @@
 
 /* ECC atomic, DMA, SMP and interrupt safe scrub function */
 
-static inline void atomic_scrub(void *va, u32 size)
+static inline void edac_atomic_scrub(void *va, u32 size)
 {
         u32 i, *virt_addr = va;
 
diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 2d2530cdf99d..a90e06ac1631 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -2,15 +2,16 @@
 #       EDAC Kconfig
 #       Copyright (c) 2008 Doug Thompson www.softwarebitmaker.com
 #       Licensed and distributed under the GPL
-#
+
+config EDAC_ATOMIC_SCRUB
+        bool
 
 config EDAC_SUPPORT
         bool
 
 menuconfig EDAC
         bool "EDAC (Error Detection And Correction) reporting"
-        depends on HAS_IOMEM
-        depends on X86 || PPC || TILE || ARM || EDAC_SUPPORT
+        depends on HAS_IOMEM && EDAC_SUPPORT
         help
           EDAC is designed to report errors in the core system.
           These are low-level errors that are reported in the CPU or
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index af3be1914dbb..943ed8cf71b9 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -30,11 +30,16 @@
 #include <linux/bitops.h>
 #include <asm/uaccess.h>
 #include <asm/page.h>
-#include <asm/edac.h>
 #include "edac_core.h"
 #include "edac_module.h"
 #include <ras/ras_event.h>
 
+#ifdef CONFIG_EDAC_ATOMIC_SCRUB
+#include <asm/edac.h>
+#else
+#define edac_atomic_scrub(va, size) do { } while (0)
+#endif
+
 /* lock to memory controller's control array */
 static DEFINE_MUTEX(mem_ctls_mutex);
 static LIST_HEAD(mc_devices);
@@ -874,7 +879,7 @@ static void edac_mc_scrub_block(unsigned long page, unsigned long offset,
         virt_addr = kmap_atomic(pg);
 
         /* Perform architecture specific atomic scrub operation */
-        atomic_scrub(virt_addr + offset, size);
+        edac_atomic_scrub(virt_addr + offset, size);
 
         /* Unmap and complete */
         kunmap_atomic(virt_addr);