1 files changed, 9 insertions, 2 deletions

diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index 348f1341e1c8..e2af8eee80e3 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -210,8 +210,12 @@ static int use_sysenter __read_mostly = -1;
 /* May not be __init: called during resume */
 void syscall32_cpu_init(void)
 {
-        if (use_sysenter < 0)
-                use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL);
+        if (use_sysenter < 0) {
+                if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+                        use_sysenter = 1;
+                if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR)
+                        use_sysenter = 1;
+        }
 
         /* Load these always in case some future AMD CPU supports
            SYSENTER from compat mode too. */
@@ -325,6 +329,9 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
         int ret = 0;
         bool compat;
 
+        if (vdso_enabled == VDSO_DISABLED)
+                return 0;
+
         down_write(&mm->mmap_sem);
 
         /* Test compat mode once here, in case someone