[tip:x86/syscall] x86, um: Mark system call tables readonly

[tip:x86/syscall] x86, um: Mark system call tables readonly

[tip-bot for H. Peter Anvin]

Commit-ID:  a074335a370eca6d72f2ec890e4ae22923a2aea4
Gitweb:     http://git.kernel.org/tip/a074335a370eca6d72f2ec890e4ae22923a2aea4
Author:     H. Peter Anvin <hpa@zytor.com>
AuthorDate: Mon, 5 Dec 2011 22:48:49 -0800
Committer:  H. Peter Anvin <hpa@zytor.com>
CommitDate: Mon, 5 Dec 2011 22:56:38 -0800

x86, um: Mark system call tables readonly

Mark the system call tables readonly, as they already are on native,
and the 32-bit UM version was in the previous assembly version.  The
32-bit version lost it due to copy and paste from the 64-bit version,
which was missing the const.

Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Link: http://lkml.kernel.org/r/tip-45db1c6176c8171d9ae6fa6d82e07d115a5950ca@git.kernel.org
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---
 arch/x86/um/sys_call_table_32.c |    2 +-
 arch/x86/um/sys_call_table_64.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/um/sys_call_table_32.c b/arch/x86/um/sys_call_table_32.c
index b897fca..0606aa3 100644
--- a/arch/x86/um/sys_call_table_32.c
+++ b/arch/x86/um/sys_call_table_32.c
@@ -43,7 +43,7 @@ typedef void (*sys_call_ptr_t)(void);
 
 extern void sys_ni_syscall(void);
 
-sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
+const sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
 	/*
 	 * Smells like a compiler bug -- it doesn't work
 	 * when the & below is removed.
diff --git a/arch/x86/um/sys_call_table_64.c b/arch/x86/um/sys_call_table_64.c
index 797a639..fe626c3 100644
--- a/arch/x86/um/sys_call_table_64.c
+++ b/arch/x86/um/sys_call_table_64.c
@@ -45,7 +45,7 @@ typedef void (*sys_call_ptr_t)(void);
 
 extern void sys_ni_syscall(void);
 
-sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
+const sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
 	/*
 	 * Smells like a compiler bug -- it doesn't work
 	 * when the & below is removed.