[PATCH] x86-64: add default case to emulate_vsyscall() to silence compiler warning

[Jan Beulich]

... since the compiler can't possibly know that vsyscall_nr is limited
to three values, and hence 'ret' must appear possibly uninitialized to
it.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxx>

---
 arch/x86/kernel/vsyscall_64.c |    3 +++
 1 file changed, 3 insertions(+)

--- 3.1-rc6/arch/x86/kernel/vsyscall_64.c
+++ 3.1-rc6-x86_64-emul-vsyscall/arch/x86/kernel/vsyscall_64.c
@@ -195,6 +195,9 @@ bool emulate_vsyscall(struct pt_regs *re
 				 (unsigned __user *)regs->si,
 				 0);
 		break;
+	default:
+		ret = -ENOSYS;
+		break;
 	}
 
 	if (ret == -EFAULT) {



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