xen/arch/x86/oprofile/nmi_int.c: let custom parameter parsing routines return errno

Modify the custom parameter parsing routines in:

xen/arch/x86/oprofile/nmi_int.c

to indicate whether the parameter value was parsed successfully.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

diff --git a/xen/arch/x86/oprofile/nmi_int.c b/xen/arch/x86/oprofile/nmi_int.c
index 126f7a8d9f9aaf41c3d0b57c3db532086d69f1d6..84ba108fdbbfbb3365fcddf873c6f8925bfddec4 100644 (file)
--- a/xen/arch/x86/oprofile/nmi_int.c
+++ b/xen/arch/x86/oprofile/nmi_int.c
@@ -323,12 +323,15 @@ static int __init p4_init(char ** cpu_type)
 
 
 static int force_arch_perfmon;
+
 static int force_cpu_type(const char *str)
 {
        if (!strcmp(str, "arch_perfmon")) {
                force_arch_perfmon = 1;
                printk(KERN_INFO "oprofile: forcing architectural perfmon\n");
        }
+       else
+               return -EINVAL;
 
        return 0;
 }