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xtensa: nommu: don't build most of the cache flushing code

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Most cache flushing code is only relevant for MMU. Don't build it for
nommu configuration.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2014-09-22 09:54:42 +04:00
parent d10fa7cf3d
commit b6cee17b7d
3 changed files with 6 additions and 5 deletions
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5
arch/xtensa/include/asm/cacheflush.h
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@ -86,7 +86,8 @@ static inline void __invalidate_icache_page_alias(unsigned long virt,
* (see also Documentation/cachetlb.txt)
*/
#if (DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP)
#if defined(CONFIG_MMU) && \
((DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP))
#ifdef CONFIG_SMP
void flush_cache_all(void);
@ -152,7 +153,7 @@ void local_flush_cache_page(struct vm_area_struct *vma,
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#if (DCACHE_WAY_SIZE > PAGE_SIZE)
#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
extern void copy_to_user_page(struct vm_area_struct*, struct page*,
unsigned long, void*, const void*, unsigned long);

2
arch/xtensa/include/asm/page.h
View file

@ -145,7 +145,7 @@ extern void copy_page(void *to, void *from);
* some extra work
*/
#if DCACHE_WAY_SIZE > PAGE_SIZE
#if defined(CONFIG_MMU) && DCACHE_WAY_SIZE > PAGE_SIZE
extern void clear_page_alias(void *vaddr, unsigned long paddr);
extern void copy_page_alias(void *to, void *from,
unsigned long to_paddr, unsigned long from_paddr);

4
arch/xtensa/mm/Makefile
View file

@ -2,6 +2,6 @@
# Makefile for the Linux/Xtensa-specific parts of the memory manager.
#
obj-y := init.o cache.o misc.o
obj-$(CONFIG_MMU) += fault.o mmu.o tlb.o
obj-y := init.o misc.o
obj-$(CONFIG_MMU) += cache.o fault.o mmu.o tlb.o
obj-$(CONFIG_HIGHMEM) += highmem.o