linux-kernel - [tip:x86/vdso] x86-64: Remove vsyscall number 3 (venosys)

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Date:	Mon, 6 Jun 2011 08:33:33 GMT
From:	tip-bot for Andy Lutomirski <luto@....edu>
To:	linux-tip-commits@...r.kernel.org
Cc:	mingo@...hat.com, brgerst@...il.com, torvalds@...ux-foundation.org,
	mikpe@...uu.se, richard.weinberger@...il.com, jj@...osbits.net,
	JBeulich@...ell.com, tglx@...utronix.de, Louis.Rilling@...labs.com,
	hpa@...or.com, linux-kernel@...r.kernel.org, luto@....edu,
	andi@...stfloor.org, bp@...en8.de, arjan@...radead.org,
	mingo@...e.hu
Subject: [tip:x86/vdso] x86-64: Remove vsyscall number 3 (venosys)

Commit-ID:  bb5fe2f78eadf5a52d8dcbf9a57728fd107af97b
Gitweb:     http://git.kernel.org/tip/bb5fe2f78eadf5a52d8dcbf9a57728fd107af97b
Author:     Andy Lutomirski <luto@....edu>
AuthorDate: Sun, 5 Jun 2011 13:50:22 -0400
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 6 Jun 2011 09:43:14 +0200

x86-64: Remove vsyscall number 3 (venosys)

It just segfaults since April 2008 (a4928cff), so I'm pretty
sure that nothing uses it.  And having an empty section makes
the linker script a bit fragile.

Signed-off-by: Andy Lutomirski <luto@....edu>
Cc: Jesper Juhl <jj@...osbits.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Arjan van de Ven <arjan@...radead.org>
Cc: Jan Beulich <JBeulich@...ell.com>
Cc: richard -rw- weinberger <richard.weinberger@...il.com>
Cc: Mikael Pettersson <mikpe@...uu.se>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Louis Rilling <Louis.Rilling@...labs.com>
Cc: Valdis.Kletnieks@...edu
Cc: pageexec@...email.hu
Link: http://lkml.kernel.org/r/4a4abcf47ecadc269f2391a313576fe6d06acef7.1307292171.git.luto@mit.edu
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/kernel/vmlinux.lds.S |    4 ----
 arch/x86/kernel/vsyscall_64.c |    5 -----
 2 files changed, 0 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 98b378d..4f90082 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -182,10 +182,6 @@ SECTIONS
 		*(.vsyscall_2)
 	}
 
-	.vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3)) {
-		*(.vsyscall_3)
-	}
-
 	. = ALIGN(__vsyscall_0 + PAGE_SIZE, PAGE_SIZE);
 
 #undef VSYSCALL_ADDR
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index 9b2f3f5..70a5f6e 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -209,11 +209,6 @@ vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
 	return 0;
 }
 
-static long __vsyscall(3) venosys_1(void)
-{
-	return -ENOSYS;
-}
-
 /* Assume __initcall executes before all user space. Hopefully kmod
    doesn't violate that. We'll find out if it does. */
 static void __cpuinit vsyscall_set_cpu(int cpu)
--
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