From: Michael S. Tsirkin <mst@redhat.com>
Date: Tue, 5 Jan 2016 16:17:53 +0000 (+0200)
Subject: s390: drop smp_mb in vdso_init
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0dab3e0e59ac3692e2f95cb37ba17d5dfb3d1e5f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

s390: drop smp_mb in vdso_init

The initial s390 vdso code is heavily influenced by the powerpc version
which does have a smp_wmb in vdso_init right before the vdso_ready=1
assignment. s390 has no need for that.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <1452010645-25380-1-git-send-email-mst@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 4f07eaced960..604f4a68b524 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -299,8 +299,6 @@ static int __init vdso_init(void)
 
 	get_page(virt_to_page(vdso_data));
 
-	smp_mb();
-
 	return 0;
 }
 early_initcall(vdso_init);