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[v2,1/2] arm64: Defer dcache flush in __cpu_copy_user_page

Message ID 1450184178-28257-2-git-send-email-ashoks@broadcom.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ashok Kumar Dec. 15, 2015, 12:56 p.m. UTC 
Defer dcache flushing to __sync_icache_dcache by calling
flush_dcache_page which clears PG_dcache_clean flag.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ashok Kumar <ashoks@broadcom.com>
---
 arch/arm64/mm/copypage.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/mm/copypage.c b/arch/arm64/mm/copypage.c
index 13bbc3be..22e4cb4 100644
--- a/arch/arm64/mm/copypage.c
+++ b/arch/arm64/mm/copypage.c
@@ -24,8 +24,9 @@ 
 
 void __cpu_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr)
 {
+	struct page *page = virt_to_page(kto);
 	copy_page(kto, kfrom);
-	__flush_dcache_area(kto, PAGE_SIZE);
+	flush_dcache_page(page);
 }
 EXPORT_SYMBOL_GPL(__cpu_copy_user_page);