x86/apic/ipi: Code cleanup

Remove completely useless and mindlessly copied comments and tidy up the
code which causes eye bleed when looking at it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Juergen Gross <jgross@suse.com> # Xen PV (dom0 and unpriv. guest)

arch/x86/kernel/apic/ipi.c

@@ -184,18 +184,13 @@ void default_send_IPI_single_phys(int cpu, int vector)
 
 void default_send_IPI_mask_sequence_phys(const struct cpumask *mask, int vector)
 {
-	unsigned long query_cpu;
 	unsigned long flags;
+	unsigned long cpu;
 
-	/*
-	 * Hack. The clustered APIC addressing mode doesn't allow us to send
-	 * to an arbitrary mask, so I do a unicast to each CPU instead.
-	 * - mbligh
-	 */
 	local_irq_save(flags);
-	for_each_cpu(query_cpu, mask) {
+	for_each_cpu(cpu, mask) {
 		__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid,
-				query_cpu), vector, APIC_DEST_PHYSICAL);
+				cpu), vector, APIC_DEST_PHYSICAL);
 	}
 	local_irq_restore(flags);
 }
@@ -203,18 +198,15 @@ void default_send_IPI_mask_sequence_phys(const struct cpumask *mask, int vector)
 void default_send_IPI_mask_allbutself_phys(const struct cpumask *mask,
 						 int vector)
 {
-	unsigned int this_cpu = smp_processor_id();
-	unsigned int query_cpu;
+	unsigned int cpu, this_cpu = smp_processor_id();
 	unsigned long flags;
 
-	/* See Hack comment above */
-
 	local_irq_save(flags);
-	for_each_cpu(query_cpu, mask) {
-		if (query_cpu == this_cpu)
+	for_each_cpu(cpu, mask) {
+		if (cpu == this_cpu)
 			continue;
 		__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid,
-				 query_cpu), vector, APIC_DEST_PHYSICAL);
+				 cpu), vector, APIC_DEST_PHYSICAL);
 	}
 	local_irq_restore(flags);
 }
@@ -283,7 +275,6 @@ void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
 	local_irq_restore(flags);
 }
 
-/* must come after the send_IPI functions above for inlining */
 static int convert_apicid_to_cpu(int apic_id)
 {
 	int i;