Revert "[SPARC64]: Wrap SMP IPIs with irq_enter()/irq_exit()."

This reverts commit 2664ef44.

Ingo moved around where the softlockup dependency sits
so this change is no longer necessary.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc64/kernel/smp.c

@@ -865,21 +865,14 @@ void smp_call_function_client(int irq, struct pt_regs *regs)
 	void *info = call_data->info;
 
 	clear_softint(1 << irq);
-
-	irq_enter();
-
-	if (!call_data->wait) {
-		/* let initiator proceed after getting data */
-		atomic_inc(&call_data->finished);
-	}
-
-	func(info);
-
-	irq_exit();
-
 	if (call_data->wait) {
 		/* let initiator proceed only after completion */
+		func(info);
 		atomic_inc(&call_data->finished);
+	} else {
+		/* let initiator proceed after getting data */
+		atomic_inc(&call_data->finished);
+		func(info);
 	}
 }
 
@@ -1041,9 +1034,7 @@ void smp_receive_signal(int cpu)
 
 void smp_receive_signal_client(int irq, struct pt_regs *regs)
 {
-	irq_enter();
 	clear_softint(1 << irq);
-	irq_exit();
 }
 
 void smp_new_mmu_context_version_client(int irq, struct pt_regs *regs)
@@ -1051,8 +1042,6 @@ void smp_new_mmu_context_version_client(int irq, struct pt_regs *regs)
 	struct mm_struct *mm;
 	unsigned long flags;
 
-	irq_enter();
-
 	clear_softint(1 << irq);
 
 	/* See if we need to allocate a new TLB context because
@@ -1072,8 +1061,6 @@ void smp_new_mmu_context_version_client(int irq, struct pt_regs *regs)
 	load_secondary_context(mm);
 	__flush_tlb_mm(CTX_HWBITS(mm->context),
 		       SECONDARY_CONTEXT);
-
-	irq_exit();
 }
 
 void smp_new_mmu_context_version(void)
@@ -1239,8 +1226,6 @@ void smp_penguin_jailcell(int irq, struct pt_regs *regs)
 {
 	clear_softint(1 << irq);
 
-	irq_enter();
-
 	preempt_disable();
 
 	__asm__ __volatile__("flushw");
@@ -1253,8 +1238,6 @@ void smp_penguin_jailcell(int irq, struct pt_regs *regs)
 	prom_world(0);
 
 	preempt_enable();
-
-	irq_exit();
 }
 
 /* /proc/profile writes can call this, don't __init it please. */