From mboxrd@z Thu Jan 1 00:00:00 1970 From: catalin.marinas@arm.com (Catalin Marinas) Date: Mon, 14 Dec 2015 15:18:13 +0000 Subject: [RFC PATCH 1/2] arm64: Defer dcache flush in __cpu_copy_user_page In-Reply-To: <1450099664-38554-2-git-send-email-ashoks@broadcom.com> References: <1450099664-38554-1-git-send-email-ashoks@broadcom.com> <1450099664-38554-2-git-send-email-ashoks@broadcom.com> Message-ID: <20151214151813.GE22038@mbp> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Dec 14, 2015 at 05:27:43AM -0800, Ashok Kumar wrote: > 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); Acked-by: Catalin Marinas -- Catalin