jeremy at goop
Jul 12, 2008, 2:22 AM
Post #1 of 1
(70 views)
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[PATCH 2/3] xen: no need to disable vdso32
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Now that the vdso32 code can cope with both syscall and sysenter
missing for 32-bit compat processes, just disable the features without
disabling vdso altogether.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge[at]citrix.com>
---
arch/x86/xen/setup.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
===================================================================
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -137,7 +137,7 @@ void __cpuinit xen_enable_syscall(void)
ret = register_callback(CALLBACKTYPE_syscall, xen_syscall_target);
if (ret != 0) {
- printk(KERN_ERR "Failed to set syscall: %d\n", ret);
+ printk(KERN_ERR "Failed to set syscall callback: %d\n", ret);
/* Pretty fatal; 64-bit userspace has no other
mechanism for syscalls. */
}
@@ -145,13 +145,8 @@ void __cpuinit xen_enable_syscall(void)
if (boot_cpu_has(X86_FEATURE_SYSCALL32)) {
ret = register_callback(CALLBACKTYPE_syscall32,
xen_syscall32_target);
- if (ret != 0) {
- printk(KERN_INFO "Xen: 32-bit syscall not supported: disabling vdso\n");
+ if (ret != 0)
setup_clear_cpu_cap(X86_FEATURE_SYSCALL32);
-#ifdef CONFIG_COMPAT
- sysctl_vsyscall32 = 0;
-#endif
- }
}
#endif /* CONFIG_X86_64 */
}
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