diff options
author | David Howells <dhowells@redhat.com> | 2010-09-29 00:57:02 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-09-29 01:01:14 (GMT) |
commit | 62bdb288bf464862a2801b2e53aadc6c4d100fab (patch) | |
tree | 35f321df2ab9091d2f4a1f788b609ad36fed03db | |
parent | 0f44fbd297e1cda5d9ecc9f5321a86fe647c7d4a (diff) | |
download | linux-fsl-qoriq-62bdb288bf464862a2801b2e53aadc6c4d100fab.tar.xz |
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: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | arch/mn10300/mm/Makefile | 14 | ||||
-rw-r--r-- | arch/mn10300/mm/cache-disabled.c | 21 |
2 files changed, 27 insertions, 8 deletions
diff --git a/arch/mn10300/mm/Makefile b/arch/mn10300/mm/Makefile index 28b9d98..1557277 100644 --- a/arch/mn10300/mm/Makefile +++ b/arch/mn10300/mm/Makefile @@ -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 -endif -endif + misalignment.o dma-alloc.o $(cacheflush-y) diff --git a/arch/mn10300/mm/cache-disabled.c b/arch/mn10300/mm/cache-disabled.c new file mode 100644 index 0000000..f669ea4 --- /dev/null +++ b/arch/mn10300/mm/cache-disabled.c @@ -0,0 +1,21 @@ +/* Handle the cache being disabled + * + * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * 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; +} |