[tip:x86/vdso] x86, vdso: Unmap vdso pages

[tip-bot for Shaohua Li]

Commit-ID:  be783a47214afc5a0aea9dafcbd9f1535ba05e94
Gitweb:     http://git.kernel.org/tip/be783a47214afc5a0aea9dafcbd9f1535ba05e94
Author:     Shaohua Li <shaohua.li@xxxxxxxxx>
AuthorDate: Mon, 2 Aug 2010 08:49:34 +0800
Committer:  H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Mon, 2 Aug 2010 15:11:59 -0700

x86, vdso: Unmap vdso pages

We mapped vdso pages but never unmapped them and the virtual address
is lost after exiting from the function, so unmap vdso pages here.

Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
LKML-Reference: <20100802004934.GA2505@xxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
---
 arch/x86/vdso/vma.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/vdso/vma.c b/arch/x86/vdso/vma.c
index ac74869..80f23ed 100644
--- a/arch/x86/vdso/vma.c
+++ b/arch/x86/vdso/vma.c
@@ -67,6 +67,7 @@ static int __init init_vdso_vars(void)
 	*(typeof(__ ## x) **) var_ref(VDSO64_SYMBOL(vbase, x), #x) = &__ ## x;
 #include "vextern.h"
 #undef VEXTERN
+	vunmap(vbase);
 	return 0;
 
  oom:
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