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[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 <bigeasy@breakpoint.cc>

CC: stable@kernel.org
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Nicolas Pitre 2009-06-12 03:09:29 +01:00 committed by Russell King
parent 44b7532b8b
commit 73be159157
1 changed files with 8 additions and 0 deletions
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8
arch/arm/include/asm/cacheflush.h
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@ -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) \