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authorNicolas Pitre <nico@cam.org>2009-06-12 03:09:29 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-06-14 11:20:37 +0100
commit73be1591579084a8103a7005dd3172f3e9dd7362 (patch)
tree0f9dc996b9effc48728b2e25f51c41eded8cb518 /arch/arm
parent44b7532b8b464f606053562400719c9c21276037 (diff)
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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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/include/asm/cacheflush.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index bb7d695f390..1a711ea8418 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) \