From 73be1591579084a8103a7005dd3172f3e9dd7362 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Fri, 12 Jun 2009 03:09:29 +0100 Subject: [PATCH] [ARM] 5545/2: add flush_kernel_dcache_page() for ARM Without this, the default implementation is a no op which is completely wrong with a VIVT cache, and usage of sg_copy_buffer() produces unpredictable results. Tested-by: Sebastian Andrzej Siewior CC: stable@kernel.org Signed-off-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/include/asm/cacheflush.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h index bb7d695..1a711ea 100644 --- a/arch/arm/include/asm/cacheflush.h +++ b/arch/arm/include/asm/cacheflush.h @@ -429,6 +429,14 @@ static inline void flush_anon_page(struct vm_area_struct *vma, __flush_anon_page(vma, page, vmaddr); } +#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE +static inline void flush_kernel_dcache_page(struct page *page) +{ + /* highmem pages are always flushed upon kunmap already */ + if ((cache_is_vivt() || cache_is_vipt_aliasing()) && !PageHighMem(page)) + __cpuc_flush_dcache_page(page_address(page)); +} + #define flush_dcache_mmap_lock(mapping) \ spin_lock_irq(&(mapping)->tree_lock) #define flush_dcache_mmap_unlock(mapping) \ -- 2.7.4