Commit 62bdb288 authored by David Howells's avatar David Howells Committed by Linus Torvalds

MN10300: Handle missing sys_cacheflush() when caching disabled

When caching is disabled on the MN10300 arch, the sys_cacheflush()
function is removed by conditional stuff in the makefiles, but is still
referred to by the syscall table.

Provide a null version that just returns 0 when caching is disabled (or
-EINVAL if the arguments are silly).
Signed-off-by: default avatarDavid Howells <>
Signed-off-by: default avatarLinus Torvalds <>
parent 0f44fbd2
......@@ -2,13 +2,11 @@
# Makefile for the MN10300-specific memory management code
cacheflush-y := cache.o cache-mn10300.o
cacheflush-$(CONFIG_MN10300_CACHE_WBACK) += cache-flush-mn10300.o
cacheflush-$(CONFIG_MN10300_CACHE_DISABLED) := cache-disabled.o
obj-y := \
init.o fault.o pgtable.o extable.o tlb-mn10300.o mmu-context.o \
misalignment.o dma-alloc.o
ifneq ($(CONFIG_MN10300_CACHE_DISABLED),y)
obj-y += cache.o cache-mn10300.o
ifeq ($(CONFIG_MN10300_CACHE_WBACK),y)
obj-y += cache-flush-mn10300.o
misalignment.o dma-alloc.o $(cacheflush-y)
/* Handle the cache being disabled
* Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
#include <linux/mm.h>
* allow userspace to flush the instruction cache
asmlinkage long sys_cacheflush(unsigned long start, unsigned long end)
if (end < start)
return -EINVAL;
return 0;
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