From mboxrd@z Thu Jan 1 00:00:00 1970 From: ashoks@broadcom.com (Ashok Kumar) Date: Mon, 14 Dec 2015 05:27:43 -0800 Subject: [RFC PATCH 1/2] arm64: Defer dcache flush in __cpu_copy_user_page In-Reply-To: <1450099664-38554-1-git-send-email-ashoks@broadcom.com> References: <1450099664-38554-1-git-send-email-ashoks@broadcom.com> Message-ID: <1450099664-38554-2-git-send-email-ashoks@broadcom.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Defer dcache flushing to __sync_icache_dcache by calling flush_dcache_page which clears PG_dcache_clean flag. Signed-off-by: Ashok Kumar --- arch/arm64/mm/copypage.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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); -- 2.1.0