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authorDavid S. Miller <davem@davemloft.net>2008-04-29 12:14:10 +0400
committerDavid S. Miller <davem@davemloft.net>2008-04-29 12:14:10 +0400
commit0a9e9b110c4ef05ab6c35440e2779ec4aa2c65e6 (patch)
tree7203abaa5ec0114694846971e667152078a8bdaa /arch/sparc
parentceb4e8e44be90d507eadfc023272269b6ca494cf (diff)
downloadlinux-0a9e9b110c4ef05ab6c35440e2779ec4aa2c65e6.tar.xz
sparc32: Kill smp_message_pass() and related code.
Completely unused, and it just makes the SMP message passing code on 32-bit sparc look more complex than it is. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/sun4d_smp.c32
-rw-r--r--arch/sparc/kernel/sun4m_smp.c45
2 files changed, 0 insertions, 77 deletions
diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c
index 0def48158c7d..dfde77ff0848 100644
--- a/arch/sparc/kernel/sun4d_smp.c
+++ b/arch/sparc/kernel/sun4d_smp.c
@@ -335,37 +335,6 @@ void smp4d_cross_call_irq(void)
ccall_info.processors_out[i] = 1;
}
-static int smp4d_stop_cpu_sender;
-
-static void smp4d_stop_cpu(void)
-{
- int me = hard_smp4d_processor_id();
-
- if (me != smp4d_stop_cpu_sender)
- while(1) barrier();
-}
-
-/* Cross calls, in order to work efficiently and atomically do all
- * the message passing work themselves, only stopcpu and reschedule
- * messages come through here.
- */
-void smp4d_message_pass(int target, int msg, unsigned long data, int wait)
-{
- int me = hard_smp4d_processor_id();
-
- SMP_PRINTK(("smp4d_message_pass %d %d %08lx %d\n", target, msg, data, wait));
- if (msg == MSG_STOP_CPU && target == MSG_ALL_BUT_SELF) {
- unsigned long flags;
- static DEFINE_SPINLOCK(stop_cpu_lock);
- spin_lock_irqsave(&stop_cpu_lock, flags);
- smp4d_stop_cpu_sender = me;
- smp4d_cross_call((smpfunc_t)smp4d_stop_cpu, 0, 0, 0, 0, 0);
- spin_unlock_irqrestore(&stop_cpu_lock, flags);
- }
- printk("Yeeee, trying to send SMP msg(%d) to %d on cpu %d\n", msg, target, me);
- panic("Bogon SMP message pass.");
-}
-
void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs;
@@ -439,7 +408,6 @@ void __init sun4d_init_smp(void)
BTFIXUPSET_BLACKBOX(hard_smp_processor_id, smp4d_blackbox_id);
BTFIXUPSET_BLACKBOX(load_current, smp4d_blackbox_current);
BTFIXUPSET_CALL(smp_cross_call, smp4d_cross_call, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(smp_message_pass, smp4d_message_pass, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(__hard_smp_processor_id, __smp4d_processor_id, BTFIXUPCALL_NORM);
for (i = 0; i < NR_CPUS; i++) {
diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c
index 0b9407267162..ffb875aacb7e 100644
--- a/arch/sparc/kernel/sun4m_smp.c
+++ b/arch/sparc/kernel/sun4m_smp.c
@@ -34,8 +34,6 @@
#include "irq.h"
-#define IRQ_RESCHEDULE 13
-#define IRQ_STOP_CPU 14
#define IRQ_CROSS_CALL 15
extern ctxd_t *srmmu_ctx_table_phys;
@@ -232,48 +230,6 @@ void smp4m_irq_rotate(int cpu)
set_irq_udt(next);
}
-/* Cross calls, in order to work efficiently and atomically do all
- * the message passing work themselves, only stopcpu and reschedule
- * messages come through here.
- */
-void smp4m_message_pass(int target, int msg, unsigned long data, int wait)
-{
- static unsigned long smp_cpu_in_msg[NR_CPUS];
- cpumask_t mask;
- int me = smp_processor_id();
- int irq, i;
-
- if(msg == MSG_RESCHEDULE) {
- irq = IRQ_RESCHEDULE;
-
- if(smp_cpu_in_msg[me])
- return;
- } else if(msg == MSG_STOP_CPU) {
- irq = IRQ_STOP_CPU;
- } else {
- goto barf;
- }
-
- smp_cpu_in_msg[me]++;
- if(target == MSG_ALL_BUT_SELF || target == MSG_ALL) {
- mask = cpu_online_map;
- if(target == MSG_ALL_BUT_SELF)
- cpu_clear(me, mask);
- for(i = 0; i < 4; i++) {
- if (cpu_isset(i, mask))
- set_cpu_int(i, irq);
- }
- } else {
- set_cpu_int(target, irq);
- }
- smp_cpu_in_msg[me]--;
-
- return;
-barf:
- printk("Yeeee, trying to send SMP msg(%d) on cpu %d\n", msg, me);
- panic("Bogon SMP message pass.");
-}
-
static struct smp_funcall {
smpfunc_t func;
unsigned long arg1;
@@ -413,6 +369,5 @@ void __init sun4m_init_smp(void)
BTFIXUPSET_BLACKBOX(hard_smp_processor_id, smp4m_blackbox_id);
BTFIXUPSET_BLACKBOX(load_current, smp4m_blackbox_current);
BTFIXUPSET_CALL(smp_cross_call, smp4m_cross_call, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(smp_message_pass, smp4m_message_pass, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(__hard_smp_processor_id, __smp4m_processor_id, BTFIXUPCALL_NORM);
}