[tip:x86/asm] x86/asm/entry/64: Fix MSR_IA32_SYSENTER_CS MSR value

tip-bot for Borislav Petkov
2015-04-03T14:08:02Z

Commit-ID: 7c74d5b7b7b63fc279ed446ebd78de20d81f2824
Gitweb: http://git.kernel.org/tip/7c74d5b7b7b63fc279ed446ebd78de20d81f2824
Author: Borislav Petkov <bp@suse.de>
AuthorDate: Fri, 3 Apr 2015 11:42:10 +0200
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Fri, 3 Apr 2015 15:29:12 +0200

x86/asm/entry/64: Fix MSR_IA32_SYSENTER_CS MSR value

Commit:

d56fe4bf5f3c ("x86/asm/entry/64: Always set up SYSENTER MSRs")

missed to add "ULL" to the 0 and wrmsrl_safe() complains:

arch/x86/kernel/cpu/common.c: In function ‘syscall_init’:
arch/x86/kernel/cpu/common.c:1226:2: warning: right shift count >= width of type wrmsrl_safe(MSR_IA32_SYSENTER_CS, 0);

Fix it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1428054130-25847-1-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/kernel/cpu/common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index a383d53..d56d307 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1184,7 +1184,7 @@ void syscall_init(void)
wrmsrl_safe(MSR_IA32_SYSENTER_EIP, (u64)ia32_sysenter_target);
#else
wrmsrl(MSR_CSTAR, ignore_sysret);
- wrmsrl_safe(MSR_IA32_SYSENTER_CS, 0);
+ wrmsrl_safe(MSR_IA32_SYSENTER_CS, 0ULL);