[PATCH RT 05/25][RFC 3.0.23-rt39-rc1] x86-64-remove-vsyscall-number-3

[Steven Rostedt <rostedt@goodmis.org>]

[-- Attachment #1: 0005-x86-64-remove-vsyscall-number-3.patch --]
[-- Type: text/plain, Size: 1490 bytes --]

From: Andy Lutomirski <luto@mit.edu>

commit bb5fe2f78eadf5a52d8dcbf9a57728fd107af97b
Author: Andy Lutomirski <luto@mit.edu>
Date:   Sun Jun 5 13:50:22 2011 -0400

    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@mit.edu>
    Link: http://lkml.kernel.org/r/4a4abcf47ecadc269f2391a313576fe6d06acef7.1307292171.git.luto@mit.edu

backport by:

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 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 89aed99..85d4a06 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -188,10 +188,6 @@ SECTIONS
 		*(.vsyscall_2)
 	}
 
-	.vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3)) {
-		*(.vsyscall_3)
-	}
-
 #define __VVAR_KERNEL_LDS
 #include <asm/vvar.h>
 #undef __VVAR_KERNEL_LDS
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index 3e68218..a2d96c7 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -222,11 +222,6 @@ vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
 	return 0;
 }
 
-static long __vsyscall(3) venosys_1(void)
-{
-	return -ENOSYS;
-}