[tip:irq/core] x86/uv: Use default_cpu_mask_to_apicid_and()

[tip-bot for Thomas Gleixner]

Commit-ID:  bbcf9574bc6fb85d22f2718d48da7f98830a7870
Gitweb:     http://git.kernel.org/tip/bbcf9574bc6fb85d22f2718d48da7f98830a7870
Author:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Tue, 20 Jun 2017 01:37:41 +0200
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Thu, 22 Jun 2017 18:21:21 +0200

x86/uv: Use default_cpu_mask_to_apicid_and()

Same functionality except the extra bits ored on the apicid.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Link: http://lkml.kernel.org/r/20170619235446.482841015@xxxxxxxxxxxxx

---
 arch/x86/kernel/apic/x2apic_uv_x.c | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index b487b3a..fd5bb20 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -530,23 +530,12 @@ uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
 			  const struct cpumask *andmask,
 			  unsigned int *apicid)
 {
-	int unsigned cpu;
+	int ret = default_cpu_mask_to_apicid_and(cpumask, andmask, apicid);
 
-	/*
-	 * We're using fixed IRQ delivery, can only return one phys APIC ID.
-	 * May as well be the first.
-	 */
-	for_each_cpu_and(cpu, cpumask, andmask) {
-		if (cpumask_test_cpu(cpu, cpu_online_mask))
-			break;
-	}
-
-	if (likely(cpu < nr_cpu_ids)) {
-		*apicid = per_cpu(x86_cpu_to_apicid, cpu) | uv_apicid_hibits;
-		return 0;
-	}
+	if (!ret)
+		*apicid |= uv_apicid_hibits;
 
-	return -EINVAL;
+	return ret;
 }
 
 static unsigned int x2apic_get_apic_id(unsigned long x)