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>

diff --git a/arch/sparc/include/asm/smp_32.h b/arch/sparc/include/asm/smp_32.h
index 7201752..a8180e5 100644 (file)
--- a/arch/sparc/include/asm/smp_32.h
+++ b/arch/sparc/include/asm/smp_32.h
@@ -50,27 +50,24 @@ struct seq_file;
 void smp_bogo(struct seq_file *);
 void smp_info(struct seq_file *);
 
-BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)
+BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long)
 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
 BTFIXUPDEF_BLACKBOX(load_current)
 
-#define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5)
+#define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4)
 
-static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
+static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); }
 static inline void xc1(smpfunc_t func, unsigned long arg1)
-{ smp_cross_call(func, arg1, 0, 0, 0, 0); }
+{ smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); }
 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
-{ smp_cross_call(func, arg1, arg2, 0, 0, 0); }
+{ smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); }
 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
                           unsigned long arg3)
-{ smp_cross_call(func, arg1, arg2, arg3, 0, 0); }
+{ smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, 0); }
 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
                           unsigned long arg3, unsigned long arg4)
-{ smp_cross_call(func, arg1, arg2, arg3, arg4, 0); }
-static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
-                          unsigned long arg3, unsigned long arg4, unsigned long arg5)
-{ smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
+{ smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, arg4); }
 
 static inline int smp_call_function(void (*func)(void *info), void *info, int wait)
 {
@@ -78,6 +75,14 @@ static inline int smp_call_function(void (*func)(void *info), void *info, int wa
        return 0;
 }
 
+static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
+                                          void *info, int wait)
+{
+       smp_cross_call((smpfunc_t)func, cpumask_of_cpu(cpuid),
+                      (unsigned long) info, 0, 0, 0);
+       return 0;
+}
+
 static inline int cpu_logical_map(int cpu)
 {
        return cpu;

diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c
index dfde77f..6959640 100644 (file)
--- a/arch/sparc/kernel/sun4d_smp.c
+++ b/arch/sparc/kernel/sun4d_smp.c
@@ -262,8 +262,9 @@ static struct smp_funcall {
 static DEFINE_SPINLOCK(cross_call_lock);
 
 /* Cross calls must be serialized, at least currently. */
-void smp4d_cross_call(smpfunc_t func, unsigned long arg1, unsigned long arg2,
-                   unsigned long arg3, unsigned long arg4, unsigned long arg5)
+static void smp4d_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
+                            unsigned long arg2, unsigned long arg3,
+                            unsigned long arg4)
 {
        if(smp_processors_ready) {
                register int high = smp_highest_cpu;
@@ -278,7 +279,7 @@ void smp4d_cross_call(smpfunc_t func, unsigned long arg1, unsigned long arg2,
                        register unsigned long a2 asm("i2") = arg2;
                        register unsigned long a3 asm("i3") = arg3;
                        register unsigned long a4 asm("i4") = arg4;
-                       register unsigned long a5 asm("i5") = arg5;
+                       register unsigned long a5 asm("i5") = 0;
 
                        __asm__ __volatile__(
                                "std %0, [%6]\n\t"
@@ -290,11 +291,10 @@ void smp4d_cross_call(smpfunc_t func, unsigned long arg1, unsigned long arg2,
 
                /* Init receive/complete mapping, plus fire the IPI's off. */
                {
-                       cpumask_t mask;
                        register int i;
 
-                       mask = cpumask_of_cpu(hard_smp4d_processor_id());
-                       cpus_andnot(mask, cpu_online_map, mask);
+                       cpu_clear(smp_processor_id(), mask);
+                       cpus_and(mask, cpu_online_map, mask);
                        for(i = 0; i <= high; i++) {
                                if (cpu_isset(i, mask)) {
                                        ccall_info.processors_in[i] = 0;
@@ -309,12 +309,16 @@ void smp4d_cross_call(smpfunc_t func, unsigned long arg1, unsigned long arg2,
 
                        i = 0;
                        do {
+                               if (!cpu_isset(i, mask))
+                                       continue;
                                while(!ccall_info.processors_in[i])
                                        barrier();
                        } while(++i <= high);
 
                        i = 0;
                        do {
+                               if (!cpu_isset(i, mask))
+                                       continue;
                                while(!ccall_info.processors_out[i])
                                        barrier();
                        } while(++i <= high);

diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c
index 406ac1a..a14a76a 100644 (file)
--- 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);