xen/arch/x86/genapic/probe.c: let custom parameter parsing routines return errno

Modify the custom parameter parsing routines in:

xen/arch/x86/genapic/probe.c

to indicate whether the parameter value was parsed successfully.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

diff --git a/xen/arch/x86/genapic/probe.c b/xen/arch/x86/genapic/probe.c
index 9a147ff64a6932d3c2fd169c129d0490afc89c12..af3745aa21f61a6c59de8bd62dfd2f97c842d475 100644 (file)
--- a/xen/arch/x86/genapic/probe.c
+++ b/xen/arch/x86/genapic/probe.c
@@ -44,12 +44,17 @@ void __init generic_bigsmp_probe(void)
                }
 }
 
-static void __init genapic_apic_force(char *str)
+static int __init genapic_apic_force(const char *str)
 {
-       int i;
+       int i, rc = -EINVAL;
+
        for (i = 0; apic_probe[i]; i++)
-               if (!strcmp(apic_probe[i]->name, str))
+               if (!strcmp(apic_probe[i]->name, str)) {
                        genapic = apic_probe[i];
+                       rc = 0;
+               }
+
+       return rc;
 }
 custom_param("apic", genapic_apic_force);