linux-kernel - [PATCH] x86: Fix the symbol versions on the 32-bit vDSO

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Message-Id: <0a869bce03d25619565b1eee7d69a4fd15fd203a.1396124118.git.luto@amacapital.net>
Date:	Sat, 29 Mar 2014 13:15:35 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	"H. Peter Anvin" <hpa@...or.com>, X86 ML <x86@...nel.org>
Cc:	Stefani Seibold <stefani@...bold.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andy Lutomirski <luto@...capital.net>
Subject: [PATCH] x86: Fix the symbol versions on the 32-bit vDSO

The new symbols provide the same API as the 64-bit variants, so they
should have the same symbol version name.  This can't break
userspace, since these symbols are new for 32-bit Linux.

Signed-off-by: Andy Lutomirski <luto@...capital.net>
---
 arch/x86/vdso/vdso32/vdso32.lds.S | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/x86/vdso/vdso32/vdso32.lds.S b/arch/x86/vdso/vdso32/vdso32.lds.S
index 28c4607..aadb8b9 100644
--- a/arch/x86/vdso/vdso32/vdso32.lds.S
+++ b/arch/x86/vdso/vdso32/vdso32.lds.S
@@ -23,14 +23,18 @@ ENTRY(__kernel_vsyscall);
  */
 VERSION
 {
+	LINUX_2.6 {
+	global:
+		__vdso_clock_gettime;
+		__vdso_gettimeofday;
+		__vdso_time;
+	};
+
 	LINUX_2.5 {
 	global:
 		__kernel_vsyscall;
 		__kernel_sigreturn;
 		__kernel_rt_sigreturn;
-		__vdso_clock_gettime;
-		__vdso_gettimeofday;
-		__vdso_time;
 	local: *;
 	};
 }
-- 
1.9.0

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