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From: ashoks@broadcom.com (Ashok Kumar)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 1/2] arm64: Defer dcache flush in __cpu_copy_user_page
Date: Thu, 17 Dec 2015 01:38:31 -0800	[thread overview]
Message-ID: <1450345112-3657-2-git-send-email-ashoks@broadcom.com> (raw)
In-Reply-To: <1450345112-3657-1-git-send-email-ashoks@broadcom.com>

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(-)

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

  reply	other threads:[~2015-12-17  9:38 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-17  9:38 [PATCH v4 0/2] arm64: change PoC D-cache flush to PoU Ashok Kumar
2015-12-17  9:38 ` Ashok Kumar [this message]
2015-12-17  9:38 ` [PATCH v4 2/2] arm64: Use PoU cache instr for I/D coherency Ashok Kumar
2015-12-17 11:51 ` [PATCH v4 0/2] arm64: change PoC D-cache flush to PoU Will Deacon

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