The code to flush the dcache of a dirty page, __flush_dcache_page,
will only flush the head of a HugeTLB/THP page.
This patch adjusts __flush_dcache_page such that the order of the
compound page is used to determine the size of area to flush.
Signed-off-by: Steve Capper <steve.capper@xxxxxxxxxx>
---
arch/arm64/mm/flush.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index 88611c3..71c182d 100644
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -72,7 +72,8 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
void __flush_dcache_page(struct page *page)
{
- __flush_dcache_area(page_address(page), PAGE_SIZE);
+ size_t page_size = PAGE_SIZE << compound_order(page);
+ __flush_dcache_area(page_address(page), page_size);
}
void __sync_icache_dcache(pte_t pte, unsigned long addr)
--
1.8.1.4
--
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