linux-kernel - [PATCH v2 06/10] x86-64: Remove vsyscall number 3 (venosys)

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Date:	Sun, 29 May 2011 23:48:43 -0400
From:	Andy Lutomirski <luto@....EDU>
To:	Ingo Molnar <mingo@...e.hu>, x86@...nel.org
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
	Jesper Juhl <jj@...osbits.net>, Borislav Petkov <bp@...en8.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Jan Beulich <JBeulich@...ell.com>,
	richard -rw- weinberger <richard.weinberger@...il.com>,
	Mikael Pettersson <mikpe@...uu.se>,
	Andy Lutomirski <luto@....edu>
Subject: [PATCH v2 06/10] 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>
---
 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 3c1ec1c..1583238 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 53d2237..71fa506 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -232,11 +232,6 @@ vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
 	return 0;
 }
 
-static long __vsyscall(3) venosys_1(void)
-{
-	return -ENOSYS;
-}
-
 void dotraplinkage do_emulate_vsyscall(struct pt_regs *regs, long error_code)
 {
 	long ret;
-- 
1.7.5.1

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