From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Sat, 12 Jul 2008 09:22:06 +0000 (-0700)
Subject: x86: xen: no need to disable vdso32
X-Git-Tag: v2.6.27-rc1~955^2~1^20~5
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=d5303b811b9d6dad2e7396d545eb7db414d42a61;p=linux-2.6-omap-h63xx.git

x86: xen: no need to disable vdso32

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@citrix.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index e3648e64a63..b6acc3a0af4 100644
--- 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 */
 }