From 0d3b051adbb72ed81956447d0d1e54d5943ee6f5 Mon Sep 17 00:00:00 2001
From: Guo Ren <guoren@linux.alibaba.com>
Date: Sun, 17 Jan 2021 23:38:18 +0800
Subject: csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL,
 HAVE_GENERIC_VDSO

It could help to reduce the latency of the time-related functions
in user space.

We have referenced arm's and riscv's implementation for the patch.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Vincent Chen <vincent.chen@sifive.com>
Cc: Arnd Bergmann <arnd@arndb.de>
---
 arch/csky/kernel/vdso.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'arch/csky/kernel/vdso.c')

diff --git a/arch/csky/kernel/vdso.c b/arch/csky/kernel/vdso.c
index 839523920843..16c20d64d165 100644
--- a/arch/csky/kernel/vdso.c
+++ b/arch/csky/kernel/vdso.c
@@ -8,7 +8,11 @@
 #include <linux/slab.h>
 
 #include <asm/page.h>
+#ifdef GENERIC_TIME_VSYSCALL
+#include <vdso/datapage.h>
+#else
 #include <asm/vdso.h>
+#endif
 
 extern char vdso_start[], vdso_end[];
 
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