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Diffstat (limited to 'arch/x86_64/kernel/setup64.c')
-rw-r--r--arch/x86_64/kernel/setup64.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c
index 64379a80d76..1200aaac403 100644
--- a/arch/x86_64/kernel/setup64.c
+++ b/arch/x86_64/kernel/setup64.c
@@ -150,6 +150,8 @@ void pda_init(int cpu)
char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]
__attribute__((section(".bss.page_aligned")));
+extern asmlinkage void ignore_sysret(void);
+
/* May not be marked __init: used by software suspend */
void syscall_init(void)
{
@@ -160,6 +162,7 @@ void syscall_init(void)
*/
wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32);
wrmsrl(MSR_LSTAR, system_call);
+ wrmsrl(MSR_CSTAR, ignore_sysret);
#ifdef CONFIG_IA32_EMULATION
syscall32_cpu_init ();