1 files changed, 8 insertions, 38 deletions

diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c
index e49b24c84133..2cc451aaaca7 100644
--- a/arch/powerpc/kernel/dbell.c
+++ b/arch/powerpc/kernel/dbell.c
@@ -13,65 +13,35 @@
 #include <linux/kernel.h>
 #include <linux/smp.h>
 #include <linux/threads.h>
-#include <linux/percpu.h>
+#include <linux/hardirq.h>
 
 #include <asm/dbell.h>
 #include <asm/irq_regs.h>
 
 #ifdef CONFIG_SMP
-struct doorbell_cpu_info {
-        unsigned long   messages;       /* current messages bits */
-        unsigned int    tag;            /* tag value */
-};
-
-static DEFINE_PER_CPU(struct doorbell_cpu_info, doorbell_cpu_info);
-
 void doorbell_setup_this_cpu(void)
 {
-        struct doorbell_cpu_info *info = &__get_cpu_var(doorbell_cpu_info);
+        unsigned long tag = mfspr(SPRN_PIR) & 0x3fff;
 
-        info->messages = 0;
-        info->tag = mfspr(SPRN_PIR) & 0x3fff;
+        smp_muxed_ipi_set_data(smp_processor_id(), tag);
 }
 
-void doorbell_message_pass(int cpu, int msg)
+void doorbell_cause_ipi(int cpu, unsigned long data)
 {
-        struct doorbell_cpu_info *info;
-
-        info = &per_cpu(doorbell_cpu_info, cpu);
-        set_bit(msg, &info->messages);
-        ppc_msgsnd(PPC_DBELL, 0, info->tag);
+        ppc_msgsnd(PPC_DBELL, 0, data);
 }
 
 void doorbell_exception(struct pt_regs *regs)
 {
         struct pt_regs *old_regs = set_irq_regs(regs);
-        struct doorbell_cpu_info *info = &__get_cpu_var(doorbell_cpu_info);
-        int msg;
 
-        /* Warning: regs can be NULL when called from irq enable */
+        irq_enter();
 
-        if (!info->messages || (num_online_cpus() < 2))
-                goto out;
+        smp_ipi_demux();
 
-        for (msg = 0; msg < 4; msg++)
-                if (test_and_clear_bit(msg, &info->messages))
-                        smp_message_recv(msg);
-
-out:
+        irq_exit();
         set_irq_regs(old_regs);
 }
-
-void doorbell_check_self(void)
-{
-        struct doorbell_cpu_info *info = &__get_cpu_var(doorbell_cpu_info);
-
-        if (!info->messages)
-                return;
-
-        ppc_msgsnd(PPC_DBELL, 0, info->tag);
-}
-
 #else /* CONFIG_SMP */
 void doorbell_exception(struct pt_regs *regs)
 {