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Commit 73be1591 authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Russell King
Browse files

[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: default avatarSebastian Andrzej Siewior <bigeasy@breakpoint.cc>

CC: stable@kernel.org
Signed-off-by: default avatarNicolas Pitre <nico@marvell.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 44b7532b

arch/arm/include/asm/cacheflush.h

+8 −0
Original line number Diff line number Diff line
@@ -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) \