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kernel
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linux
xtensa: nommu: don't build most of the cache flushing code
Most cache flushing code is only relevant for MMU. Don't build it for
nommu configuration.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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arch/xtensa/include/asm/cacheflush.h
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arch/xtensa/include/asm/cacheflush.h
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* (see also Documentation/cachetlb.txt)
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*/
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-
#if (DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP)
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#if defined(CONFIG_MMU) && \
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((DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP))
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#ifdef CONFIG_SMP
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void flush_cache_all(void);
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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#if (DCACHE_WAY_SIZE > PAGE_SIZE)
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#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
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extern void copy_to_user_page(struct vm_area_struct*, struct page*,
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unsigned long, void*, const void*, unsigned long);
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arch/xtensa/include/asm/page.h
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arch/xtensa/include/asm/page.h
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* some extra work
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*/
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#if DCACHE_WAY_SIZE > PAGE_SIZE
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#if defined(CONFIG_MMU) && DCACHE_WAY_SIZE > PAGE_SIZE
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extern void clear_page_alias(void *vaddr, unsigned long paddr);
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extern void copy_page_alias(void *to, void *from,
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unsigned long to_paddr, unsigned long from_paddr);
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arch/xtensa/mm/Makefile
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arch/xtensa/mm/Makefile