sparc32: Implement smp_call_function_single().

Reported by Stephen Rothwell.

Needed to fix the build when CONFIG_RELAY is enabled.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 4 deletions

diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c
index 406ac1abc83a..a14a76ac7f36 100644
--- a/arch/sparc/kernel/sun4m_smp.c
+++ b/arch/sparc/kernel/sun4m_smp.c
@@ -244,9 +244,9 @@ static struct smp_funcall {
 static DEFINE_SPINLOCK(cross_call_lock);
 
 /* Cross calls must be serialized, at least currently. */
-static void smp4m_cross_call(smpfunc_t func, unsigned long arg1,
+static void smp4m_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
                              unsigned long arg2, unsigned long arg3,
-                             unsigned long arg4, unsigned long arg5)
+                             unsigned long arg4)
 {
                 register int ncpus = SUN4M_NCPUS;
                 unsigned long flags;
@@ -259,14 +259,14 @@ static void smp4m_cross_call(smpfunc_t func, unsigned long arg1,
                 ccall_info.arg2 = arg2;
                 ccall_info.arg3 = arg3;
                 ccall_info.arg4 = arg4;
-                ccall_info.arg5 = arg5;
+                ccall_info.arg5 = 0;
 
                 /* Init receive/complete mapping, plus fire the IPI's off. */
                 {
-                        cpumask_t mask = cpu_online_map;
                         register int i;
 
                         cpu_clear(smp_processor_id(), mask);
+                        cpus_and(mask, cpu_online_map, mask);
                         for(i = 0; i < ncpus; i++) {
                                 if (cpu_isset(i, mask)) {
                                         ccall_info.processors_in[i] = 0;
@@ -284,12 +284,16 @@ static void smp4m_cross_call(smpfunc_t func, unsigned long arg1,
 
                         i = 0;
                         do {
+                                if (!cpu_isset(i, mask))
+                                        continue;
                                 while(!ccall_info.processors_in[i])
                                         barrier();
                         } while(++i < ncpus);
 
                         i = 0;
                         do {
+                                if (!cpu_isset(i, mask))
+                                        continue;
                                 while(!ccall_info.processors_out[i])
                                         barrier();
                         } while(++i < ncpus);